EP2570861A1 - Clock barrel assembly with reduced core diameter - Google Patents

Abstract

The assembly (1) has an adjusting unit to adjust a longitudinal play between the assembly and a plate (10)/bridge (11) carrying the assembly. The adjusting unit is formed by a wedging/stroke limiting unit to wedge or limit stroke of a drum (3) and/or a cover (7) with respect to the plate/the bridge to constitute a chamber enclosing a barrel spring (2) or by a guiding unit to guide pivoting of the drum or/and the cover into the plate and/or the bridge to constitute the chamber. The adjusting unit is formed by the limiting and guiding units to limit the play in direction of swivel axis (D). An independent claim is also included for a clockwork movement.

Description

Field of the invention

The invention relates to a barrel assembly for a mechanical watch with reduced bung diameter.

The invention also relates to a watch movement comprising at least one such barrel assembly.

The invention also relates to a timepiece comprising at least one such movement and / or at least one such barrel assembly.

The invention relates to the field of watchmaking, and more particularly the field of energy storage barrels, for feeding a movement, a ring, or other functionality of a room watchmaking.

Background of the invention

To increase the power reserve, by increasing the number of turns of a mainspring, one solution consists of a decrease in the diameter of the barrel shaft and the associated bung, so as to increase the space available in the drum. for the spring.

The ratio of the bead radius to the thickness of the spring is usually between 10 and 20, and the invention proposes to lower this ratio below 10, and preferably in the range between 5 and 10.

Sizing should not be done lightly, indeed a risk of breakage exists if the diameter of the plug is too small.

In the conventional architecture of the barrels, a ratchet is mounted axially on a barrel axis or on a bung, via a square, the ratchet being generally fixed by an axial screw. The size of this screw and that of the square thus condition a minimum diameter of a pivoting surface. A shoulder abutting with this pivoting surface limits axial fretting of the shaft or the bung relative to a plate or bridge carrying a stone or the like.

A diameter even greater than that of this shoulder is necessary for a pivoting guide surface of the drum on the shaft or on the bung, combined with a shoulder limiting axial fretting of the drum. The respect of minimal sections of matter implies a quotation chain which results in a large size, difficult to reduce. In particular, it is not enough to reduce all the sizing, because the sections of material are then insufficient to ensure fatigue resistance.

Summary of the invention

Because of these physical limitations to the dimensioning of the various components, it is necessary to consider other barrel architectures than the conventional architecture that has just been described.

The invention takes into account several solutions to achieve this reduction of the bung diameter.

An important constraint is to ensure the disassembly of the assembly, for a possible exchange of the mainspring.

For this purpose, the invention relates to a watch-barrel assembly, comprising at least one torsion-mounted barrel-mounted mainspring between a barrel drum at one end and at a second end a receiving surface that includes a plug of barrel coaxial with said drum about a pivot axis, characterized in that the maximum radius of said bung relative to said pivot axis is less than nine times the maximum thickness of said spring, and further characterized in that said barrel assembly comprises means for adjusting the longitudinal gap between said barrel assembly and at least one plate or a carrying or carrying bridge of said barrel assembly, said means of adjustment being constituted either by means of setting or limitation of stroke, with respect to said plate or said bridge, said drum and / or a cover fixed on said drum to form with it a chamber enclosing said spring, or else constituted by means for pivotally guiding, directly in a said platen and / or in a said bridge, of said drum and / or of a lid fixed on said drum to form with it a chamber enclosing said spring, or constituted by the combination of said stalling or stroke limiting means and said pivoting guide means, in the direction of said pivot axis, to limit the frost between said barrel and said at least one platinum or bridge.

According to a characteristic of the invention, said adjustment means are constituted by means of setting or limiting stroke comprising a wedge washer interposed between on the one hand a said plate or a said bridge, and on the other hand said drum or a lid fixed on said drum to form with it a chamber enclosing said spring.

According to a feature of the invention, said lock washer is guided by a bearing that includes said bung.

According to a characteristic of the invention, said adjustment means are constituted by pivotally direct guiding means in a said plate and / or in a said bridge of said drum and a lid fixed on said drum to form with it a chamber enclosing said spring.

According to a characteristic of the invention, said adjustment means are constituted by at least one projecting protrusion of an external surface of said drum facing a said plate or a said bridge, and / or by at least one projecting protrusion of an outer surface of a said platen or a said bridge that comprises said assembly and facing an outer surface of said drum.

According to a characteristic of the invention, said adjustment means are constituted by at least one protruding protrusion of an external surface of a lid fixed on said drum to constitute with it a chamber enclosing said spring, facing a said platinum or at a said bridge, and / or at least one protruding protrusion of an outer surface of a said plate or a said bridge that includes said assembly and facing an outer surface of a said cover.

According to one characteristic of the invention, said adjustment means are completed by at least one protruding projection of an outer surface of a ratchet carried by said bung facing a said plate or a said bridge, and / or by least one protruding protrusion of an outer surface of a said platen or a said deck that includes said assembly and facing an outer surface of said ratchet.

The invention also relates to a watchmaking movement comprising at least one such barrel assembly for energy storage with an incorporated input, or else a ratchet integral pivotally mounted to said bung, or by a fixed mounted toothing of drum in pivoting of said drum and an output constituted respectively, or by a toothing of drum mounted integral pivotally of said drum, or by a ratchet integral pivotally of said bung.

The invention also relates to a timepiece comprising at least one such clockwork movement and / or at least one such barrel assembly for energy storage with an incorporated input, or else a ratchet mounted pivotally to said bonde, or by a toothing drum mounted pivotally integral with said drum, and an outlet respectively constituted by a toothing drum mounted integral pivoting said drum, or by a ratchet integral pivotally of said bung.

Brief description of the drawings

• la figure 1 représente, de façon schématisée et en coupe dans un plan passant par son axe de pivotement, un barillet d'horlogerie, selon une variante de l'invention,
• la figure 2 représente, de façon schématisée et en coupe dans un plan passant par son axe de pivotement, un barillet avec une bonde classique, et la figure 3 illustre une transformation de cet ensemble barillet et de cette bonde selon une variante de l'invention avec une rondelle de calage,
• les figures 4 à 6 représentent, de façon schématisée, partielle, et en coupe dans un plan passant par son axe de pivotement, un barillet selon des variantes de l'invention, avec des appuis sous forme de filets, respectivement entre un pont et le rochet sur la figure 4, et entre d'une part un pont porteur d'un filet et le tambour, et d'autre part entre une platine et le couvercle du barillet, ce couvercle étant porteur d'un filet, sur la figure 5, et entre le tambour et un pont avec filet sur le tambour sur la figure 6,
• la figure 7 représente, de façon schématisée et en coupe dans un plan passant par son axe de pivotement, un barillet avec une bonde classique, et la figure 8 illustre une transformation de cet ensemble barillet et de cette bonde selon une variante de l'invention avec une bonde étagée en deux parties,
• la figure 9 représente, sous forme d'un schéma-blocs, une pièce d'horlogerie comportant un mouvement et un ensemble barillet selon l'invention,
• les figures 10 à 16 représentent, de façon schématisée et en coupe dans un plan passant par leur axe de pivotement, différentes variantes de barillet d'horlogerie selon l'invention,
• la figure 10 avec bonde monobloc guidée dans deux pierres de la platine et d'un pont, cette bonde portant tambour et couvercle, le tambour présentant sur une face externe un filet agencé pour coopérer en appui avec la pierre du pont supérieur,
• la figure 11 est analogue à la figure 10, et comporte une rondelle de réglage chassée sur la bonde et agencée pour venir en appui sur une face du couvercle,
• la figure 12 avec bonde monobloc guidée dans deux pierres de la platine et d'un pont, cette bonde portant tambour et couvercle, le tambour présentant sur une face externe un filet agencé pour coopérer en appui avec la pierre du pont supérieur, et le couvercle présentant un filet similaire pour coopérer avec la pierre de platine, le ressort comportant une première spire élargie,
• la figure 13 avec bonde en deux parties, dont l'une appelée arbre de barillet est guidée dans une pierre d'un pont et porte le tambour, et dont l'autre appelée bonde est guidée dans une pierre d'une platine et porte le couvercle, le couvercle présentant sur une face externe un filet agencé pour coopérer en appui avec la pierre de la platine, le ressort comportant une spire élargie, autre que la première spire,
• la figure 14 analogue à la figure 12 avec bonde monobloc guidée dans deux pierres de la platine et d'un pont, cette bonde portant tambour et couvercle, le tambour présentant sur une face externe un filet agencé pour coopérer en appui avec la pierre du pont supérieur, et le couvercle présentant un filet similaire pour coopérer avec la pierre de platine, le tambour et le couvercle serrés sur des épaulements de la bonde, le rochet étant vissé sur la bonde qui est filetée,
• la figure 15 avec bonde monobloc guidée dans deux pierres de la platine et d'un pont, cette bonde portant tambour et couvercle et comportant une collerette agencée pour coopérer en appui avec une face interne du tambour,
• la figure 16 analogue à la figure 14 avec bonde monobloc portant tambour et couvercle, lesquels sont guidés chacun dans une pierre de la platine et d'un pont, le tambour présentant sur une face externe un filet agencé pour coopérer en appui avec la pierre du pont supérieur, et le couvercle présentant un filet similaire pour coopérer avec la pierre de platine, le tambour et le couvercle serrés sur des épaulements de la bonde, le rochet étant vissé sur la bonde qui est filetée.

Other characteristics and advantages of the invention will appear better on reading the detailed description which follows, with reference to the appended drawings, in which:

• the figure 1 represents, schematically and in section in a plane passing through its pivot axis, a watch cylinder, according to a variant of the invention,
• the figure 2 represents, schematically and in section in a plane passing through its pivot axis, a barrel with a conventional bung, and the figure 3 illustrates a transformation of this barrel assembly and this bung according to a variant of the invention with a wedging washer,
• the Figures 4 to 6 represent, schematically, partially, and in section in a plane passing through its pivot axis, a cylinder according to variants of the invention, with support in the form of nets, respectively between a bridge and the ratchet on the figure 4 , and between on the one hand a bridge carrying a net and the drum, and on the other hand between a plate and the lid of the barrel, this lid being a carrier of a net, on the figure 5 , and between the drum and a deck with net on the drum on the figure 6 ,
• the figure 7 represents, schematically and in section in a plane passing through its pivot axis, a barrel with a conventional bung, and the figure 8 illustrates a transformation of this barrel assembly and this bung according to a variant of the invention with a bored plug in two parts,
• the figure 9 represents, in the form of a block diagram, a timepiece comprising a movement and a barrel assembly according to the invention,
• the Figures 10 to 16 show, schematically and in section in a plane passing through their pivot axis, different watch cylinder variants according to the invention,
• the figure 10 with monobloc plug guided in two stones of the plate and a bridge, this bung carrying drum and cover, the drum having on one external face a net arranged to cooperate in support with the stone of the upper bridge,
• the figure 11 is analogous to the figure 10 , and comprises a setting washer driven on the bung and arranged to bear on one face of the cover,
• the figure 12 with monobloc plug guided in two stones of the plate and a bridge, this bung carrying drum and cover, the drum having on one external face a net arranged to cooperate in support with the stone of the upper deck, and the cover having a net similar to cooperate with the platinum stone, the spring having a first enlarged turn,
• the figure 13 with a bung in two parts, of which one called barrel shaft is guided in a stone of a bridge and carries the drum, and whose other called bonde is guided in a stone of a plate and carries the lid, the cover having on one external face a net arranged to cooperate in support with the stone of the plate, the spring comprising an enlarged turn, other than the first turn,
• the figure 14 analogous to figure 12 with monobloc plug guided in two stones of the plate and a bridge, this bung carrying drum and cover, the drum having on one external face a net arranged to cooperate in support with the stone of the upper deck, and the cover having a net similar to cooperate with the platinum stone, the drum and the cover tight on the shoulders of the bung, the ratchet being screwed on the bung which is threaded,
• the figure 15 with monobloc plug guided in two stones of the plate and a bridge, this bung carrying drum and cover and having a flange arranged to cooperate in support with an inner face of the drum,
• the figure 16 analogous to figure 14 with one-piece bung carrying drum and lid, which are each guided in a stone of the plate and a bridge, the drum having on one outer face a net arranged to cooperate in support with the stone of the upper deck, and the cover having a similar net to cooperate with the platinum stone, the drum and the cover tight on shoulders of the bung, the ratchet being screwed on the bung which is threaded.

Detailed Description of the Preferred Embodiments

The invention relates to the field of watchmaking, and more particularly the field of energy storage barrels, for feeding a movement, a ring, or other functionality of a room watchmaking.

The invention takes into account several solutions to achieve a decrease in the bung diameter, which allows to increase the energy stored in the barrel.

The different routes proposed by the invention can be combined with each other, to obtain an optimal result depending on the space available, the position of the ratchet, the presence or absence of a lid for closing the cylinder, this function can also be devolved to the ratchet.

A first solution is to ensure the frolicking between drum and cover by the mainspring, transferring to the spring this frolicking adjustment function, in particular by equipping the spring protruding areas, such as dots, more rolled areas wide, flange reported, or the like. It is then possible to remove the bearing shoulders of the drum and cover on the barrel shaft or on the bung.

A second solution is to make a bung in several parts, including two or three parts. This solution makes it possible in particular to make a bung of diameter smaller than the diameter of pivoting of the drum. Advantageously, the plug is introduced through the bore of the drum. A shaft or a bung in two parts, or more, facilitates the machining of hook of hook of the shell of the mainspring.

The bung may include, for the ratchet drive, a conventional square, or a thread. Or, in a non-limiting way, in a second variant

The bung can still include one or more washers or diameter catch rings for its guidance in platinum and bridge.

Another solution is to chase on the bung a setting washer of the drum-lid frog. This washer is mounted so as to avoid, for an intervention on the cylinder, any disassembly of a bridge.

Yet another solution is to provide pivoting in the bridges for the drum and / or the cover, instead of performing this pivoting at the barrel shaft or the plug. Advantageously, both the drum and the lid are pivoted in a plate and a bridge.

The different variants proposed by the invention ensure ease of machining, ease of assembly, ease of disassembly, and control of axial debates between the various components and with respect to the bridges.

• l'ébat du barillet "seul", d'une part,
• l'ébat du barillet avec la ou les ébauches, ci-après réduites pour la simplicité de l'exposé et de façon non limitative à une platine et à un pont, d'autre part.

Two types of frolics are to be considered:

• the frenzy of the barrel "alone", on the one hand,
• the frolicking of the barrel with the blank or drafts, hereinafter reduced for the simplicity of the presentation and in a nonlimiting manner to a plate and a bridge, on the other hand.

These antics add up and we must take into account these two frolics in the construction.

The invention lies immediately in the search for the smallest possible bung diameter. In this case, the invention seeks to propose new solutions to take back one or the other of these antics, or both.

• un contact entre le tambour de barillet ou/et le couvercle de barillet d'une part, et d'autre part une portée de la bonde, ou de l'arbre de barillet selon l'architecture de la bonde ;
• la mise en contact, en une ou plusieurs surfaces, du ressort de barillet d'une part, avec d'autre part le tambour de barillet ou/et le couvercle de barillet.

For this purpose, the invention is designed to allow the implementation of alternative solutions, for the recovery of the frog barrel "alone":

• a contact between the barrel drum and / or the barrel cover on the one hand, and on the other hand a range of the bung, or the barrel shaft according to the architecture of the bung;
• contacting, in one or more surfaces, the mainspring on the one hand, and on the other hand the barrel drum and / or the barrel lid.

• la première spire interne du ressort, en contact avec la surface de réception de la bonde, est plus haute que les autres spires ;
• une autre spire, suffisamment éloignée de la bonde pour ne pas coopérer avec une portée de la bonde, mais pour coopérer directement avec une surface intérieure du tambour, ou du couvercle, ou similaire, est plus haute que les autres spires ;
• certaines spires sont est plus hautes que les autres spires ;
• au moins une spire de hauteur supérieure aux autres est rapportée sur le ressort ;
• ou bien, pour assurer un contact de limitation d'ébat entre le ressort et une paroi interne de la chambre, le tambour ou/et le couvercle comporte ou comportent une ou plusieurs protubérances, ressauts, filets ou similaires, sur une face intérieure tournée vers le ressort. On appelle ici « filet » une surface, de préférence de révolution, saillante depuis une

surface, pour coopérer en appui sur une surface voisine d'un autre composant pour maintenir ces surfaces à distance l'une de l'autre lorsque le rattrapage des jeux du mécanisme, sous l'effet de la pesanteur ou d'une accélération due à un mouvement de l'utilisateur, pousse ces composants l'un vers l'autre.In this embodiment with contact between the spring and one or more of the internal surfaces of the chamber in which this spring is enclosed (that this chamber is constituted by a drum and a lid, or by a drum and a ratchet, or by a drum and a bridge), several variants are possible:

• the first inner turn of the spring, in contact with the receiving surface of the bung, is higher than the other turns;
• another turn, sufficiently far from the bung to not cooperate with a range of the bung, but to cooperate directly with an inner surface of the drum, or cover, or the like, is higher than the other turns;
• some turns are higher than the other turns;
• at least one turn higher than the others is reported on the spring;
• or, to provide a frost-limiting contact between the spring and an inner wall of the chamber, the drum and / or the cover comprises or comprise one or more protuberances, projections, threads or the like, on an inner face facing towards the spring. Here is called "net" a surface, preferably of revolution, protruding from a

surface, to cooperate in support on a neighboring surface of another component to maintain these surfaces at a distance from each other when the catch of the games of the mechanism, under the effect of gravity or acceleration due to a movement of the user pushes these components towards each other.

• un contact entre d'une part une portée de la bonde ou de l'arbre de barillet (selon la constitution de la bonde), et d'autre part une pierre ou un élément de guidage que comporte une platine ou un pont de l'ébauche;
• un contact entre d'une part le tambour de barillet ou/et le couvercle de barillet, et d'autre part une pierre, ou un moyen de guidage similaire, chassée dans une platine ou un pont, par l'intermédiaire d'une ou plusieurs protubérances, ressauts, filets ou similaires, ménagée ou ménagées sur une face du tambour ou/et du couvercle
• un contact entre d'une part le tambour de barillet ou/et le couvercle de barillet, et d'autre part une pierre, ou un moyen de guidage similaire, chassée dans une platine ou un pont, par l'intermédiaire d'une ou plusieurs protubérances, ressauts, filets ou similaires, ménagée ou ménagées sur une face de la platine ou/et du pont.

As regards the recovery of the frolicking of the complete barrel with the blank in which this barrel assembly is incorporated, the invention proposes several variants:

• a contact between on the one hand a range of the bung or the barrel shaft (according to the constitution of the bung), and secondly a stone or a guide element that comprises a plate or a bridge of the draft;
• contact between, on the one hand, the barrel drum and / or the barrel lid, and on the other hand a stone, or similar guiding means, driven into a platen or a bridge, via one or a plurality of protuberances, projections, threads or the like, arranged or arranged on one face of the drum and / or the cover
• contact between, on the one hand, the barrel drum and / or the barrel lid, and on the other hand a stone, or similar guiding means, driven into a platen or a bridge, via one or several protuberances, projections, nets or the like, arranged or formed on one side of the plate and / or the bridge.

The figures illustrate certain particular embodiments among the multiple combinations that can be made according to the invention.

This watch barrel assembly 1 comprises at least one torsion-mounted mainspring 2 mounted between a barrel drum 3 at a first end 21 and at a second end 22 a receiving surface 5 comprising a plug 4 of barrel. This plug 4 is coaxial with the drum 3 about a pivot axis D. According to the invention, the maximum radius of the plug 4 with respect to the pivot axis D is less than nine times the maximum thickness of the spring 2. In particular the embodiments illustrated allow to obtain a ratio close to five.

According to the invention, this barrel assembly 1 comprises means for adjusting the longitudinal gap 6 between the barrel assembly 1 and at least one plate 10 or a bridge 11 carrying or carrying this barrel assembly 1.

• ou bien constitués par des moyens de calage ou de limitation de course, par rapport à la platine 10 ou au pont 11, du tambour 3 ou/et d'un couvercle 7 fixé sur le tambour 3 pour constituer avec lui une chambre 32 enfermant le ressort 2,
• ou bien constitués par des moyens de guidage en pivotement, directement dans une platine 10 ou/et dans un pont 11, du tambour 3 ou/et d'un tel couvercle 7 fixé sur le tambour 3 pour constituer avec lui une chambre 32 enfermant le ressort 2,
• ou bien constitués par la combinaison de ces moyens de calage ou de limitation de course et de ces moyens de guidage en pivotement, selon la direction de l'axe de pivotement D, pour limiter l'ébat entre l'ensemble barillet 1 et cette ou ce au moins une platine 10 ou pont 11.

These adjustment means are:

• or constituted by means for setting or limiting the stroke, with respect to the plate 10 or to the bridge 11, of the drum 3 and / or of a lid 7 fixed on the drum 3 to constitute with it a chamber 32 enclosing the spring 2,
• or else constituted by pivotally guiding means, directly in a plate 10 and / or in a bridge 11, of the drum 3 or / and of such a cover 7 fixed on the drum 3 to form with it a chamber 32 enclosing the spring 2,
• or else constituted by the combination of these means for setting or limiting the stroke and for these pivoting guide means, in the direction of the pivot axis D, to limit the play between the barrel assembly 1 and this or this at least one plate 10 or bridge 11.

In the variant of the figure 3 these adjustment means are constituted by means for setting or limiting stroke comprising a wedge washer 70 interposed between a plate 10 or a bridge 11, and the drum 3 or a cover 7 fixed on the drum 3 to constitute with it a chamber 32 enclosing the spring 2.

Preferably, this lock washer 70 is guided by a bearing 44 that includes the bung 4, and more particularly is driven on this scope.

In a variant, the adjustment means consist of pivoting guide means directly in a plate 10 and / or in a bridge 11 of the drum 3 and a cover 7 fixed on the drum 3 to constitute with it a chamber 32 enclosing the spring 2.

In the variant of the figure 6 , the adjustment means are constituted by at least one projection 202 projecting from an outer surface 30 of the drum 3 facing a plate 10 or said bridge 11, and / or, as visible on the figure 5 , by at least one projection 102 projecting from an outer surface of a plate 10 or a bridge 11 that includes the assembly 1, or belonging to a movement 100 or a timepiece 1000 receiving this barrel assembly 1 , and facing an outer surface 30 of the drum 3.

In the variant of the figure 5 , the adjustment means are constituted by at least one projection 207 projecting from an outer surface 76 of a cover 7 fixed on the drum 3 to constitute with it a chamber 32 enclosing the spring 2, facing a plate 10 or said bridge 11, or / and by at least one projection 107 projecting from an outer surface of a plate 10 or a bridge 11 that includes the assembly 1 and facing an outer surface 76 of such a lid 7 .

In the variant of the figure 5 , the adjustment means are completed by at least one projection 201, also visible on the figure 4 protruding from an outer surface 121 of a ratchet 12 carried by the bung 4 facing a plate 10 or a said bridge 11, and / or by at least one projection 101 projecting from an outer surface of a plate 10 or a bridge 11 that includes the assembly 1 and facing an outer surface 121 of the ratchet 12.

In a particular variant embodiment, the receiving surface 5 of the spring 2 is a surface of revolution with respect to the pivot axis D.

In a particular variant, the spring 2 is fixed to the bung 4 by friction.

In a preferred embodiment, the spring 2 is welded or brazed to the bung 4 so as to form a monoblock bung spring subassembly.

The Figures 4 to 6 illustrate supports in the form of nets, respectively between a bridge 11 and the ratchet 12 on the figure 4 , and between on the one hand a bridge 11 carrying a net 102 and the drum 3, and on the other hand between a plate 10 and the cover 7 of the cylinder 1. This cover 7 carries a net 207 on the figure 5 , which shows a plate 10 and a bridge 11 each carrying a thread, respectively 107 and 102, cooperating respectively with the lid 7 and the drum 3.

The support in the form of threads is formed between the drum 3 and a bridge 11, with a thread 202 on the drum 3 on the figure 6 .

The figure 8 illustrates a bung 4 step in two parts 4A and 4B, the latter 4B having a bearing surface 43 for guiding a bore 35 of the drum 3. The main part 4A is guided in a stone driven into the plate 10 at a range 182 at its lower end 87, guiding the cover 7 is on a bearing surface 44 of the flange 4A which cooperates with a bore 75 of the cover 7. The portion 4B is guided by a bearing 181 in a stone driven in the bridge 11 to its upper end 86. This figure illustrates a traditional attachment of the spring 2 on a hook 41.

The figure 10 illustrates an inverted configuration compared to that of the figure 5 , and this is the drum 3 of the figure 10 which carries a net 202, intended to cooperate in support with a stone 302 driven into a bridge 11, 302 stone whose bore guides a scope 43 of the bung. In this particular variant, this same cylindrical bearing surface 43 extends to ensure the pivoting guidance of the drum 3.

Putting the net on the stone makes it possible to control the friction torque between the net and the stone, and to keep it at a very low value.

On this figure 10 the play between the bung and the mounted barrel assembly is given by the limitation of the support of the drum 3 and the cover 7 on the bearing surfaces 43A and 43B of the bung 4.

The fretting of the barrel assembly relative to the blank is defined by the axial play of the plug 4, which is limited by the thread 202 of the drum 3 facing the stone 302.

This variant of the figure 10 is illustrated here with the bridge 11 interposed between the drum 3 and the ratchet 12.

The figure 11 also shows a thread 202 of the drum 3 arranged to cooperate with a stone 302 driven into a bridge 11.

The bung 4 door, driven on one of its bearing surfaces 44, a washer 70. The washer 70 is driven on height to ensure an axial space.

The prancing of the plug with respect to the barrel assembly is limited by the movement of this washer 70 with respect to a lower bearing face 73 of the lid 7.

The frog of the barrel vis-à-vis the blank is limited by the plug 4 with respect to the stone 702 of the plate 10 on the one hand, and the thread 202 of the drum 3 relative to the bridge 11 of somewhere else.

The figure 12 also shows a thread 202 of the drum 3 arranged to cooperate with a stone 302 driven into a bridge 11, and a thread 207 of the cover 7 arranged to cooperate with a stone 702 driven into the plate 10.

On this figure 12 , axial play of the barrel alone is provided by the spring 2 which has a projecting zone 23, here represented in the form of a first enlarged turn, cooperating directly, according to the position of the plug 4, with an inner surface 31 of the drum 3, or with an inner surface 71 of the lid 7.The barrel chat in the bridges is provided by the threads 202 or 207 on each side, outside the drum and the lid.

The figure 13 shows a thread 207 of the cover 7 arranged to cooperate with a stone 702 driven into the plate 10.

The bung is in two parts: the bung 4 proper carrier of the spring 2, fitted on a barrel shaft 18, with axial limitation by a bearing face 18A of the barrel shaft 18 and an antagonistic bearing face 49 of the bung 4.

The bung 4, carrier of the inner end 22 of the spring 2, has a bore bore 411 cooperating with a bearing surface 84 of a barrel shaft 18.

The recovery of the frog of the barrel alone is provided by the spring 2, which has a projecting zone 23, here an attached flange or a turn sufficiently far from the axis so as to bear on the inner surface 31 of the drum 3 rather than on a lower shoulder 189A of the barrel shaft.

While the frog of the barrel complete with the blank is provided, on one side by an upper shoulder 189B of the barrel shaft 18 arranged to bear in contact with the stone 302 of the bridge 11, and the other side by the contact of the thread 207 of the cover 7on the stone 702 of the plate 10.

The figure 14 still shows a thread 202 of the drum 3 arranged to cooperate with a stone 302 driven into a bridge 11, and a thread 207 of the cover 7 arranged to cooperate with a stone 702 driven into the plate 10.

The recovery of the complete barrel in the blanks is identical to the figure 12 while the recovery of the frog of the barrel alone vis-à-vis the rough is made by contact of a scope of the plug 4, respectively 407 with the lid 7 or 403 with the drum 3.

This figure 14 shows a ratchet 12 having a tapped thread on a thread that includes the bung 4.

The figure 15 illustrates an advantageous variant with a bung 4 having a lower flange 40, which is arranged to abut by a bearing face 401 on an inner face 31 of the drum 3.

The fretting of the bung with respect to the barrel assembly is limited by the displacement of the drum 3 and the cover 7 with respect to the bearing faces 40A and 407 of the bung 4.

The fretting of the barrel assembly relative to the blank is framed by the contacts between the opposite bearing faces 49A and 49B of the plug 4, with the stones 702 of the plate 10 and 302 of the bridge 11 respectively.

The bung 4 is advantageously made of several coaxial parts to simplify its machining.

The figure 16 illustrates a variant of the version of the figure 14 . In this version, the antics are repeated in the same way. But the guides are different with the pivoting of the drum 3 and the cover 7 are directly in the blank, respectively at the bridge 11 and the plate 10. This provision provides better control axial beat, because of the enlargement of the pivot diameter.

The invention also relates to a watchmaking movement 100 comprising at least one such barrel assembly 1 for storing energy with an incorporated input, or else a ratchet 12 pivotally mounted on the plug 4, or by a set of teeth drum 13 mounted pivotally mounted to the drum 3, and an outlet respectively formed, or by a toothing drum 13 mounted pivotally integral with the drum 3, or by a ratchet 12 mounted pivotally integral with the bung 4.

The invention also relates to a timepiece 1000 comprising at least one watch movement 100 and / or at least one such barrel assembly 1 for energy storage with an incorporated input, or a ratchet 12 mounted solidarity pivoting the bung 4, or by a toothing drum 13 mounted pivotally integral with the drum 3, and an output constituted respectively, or by a toothing drum 13 mounted to pivotally attached to the drum 3, or by a ratchet 12 mounted pivotally integral with the bung 4.

The invention provides the means for making a bung of very small diameter, and thus increase the storage capacity and the power reserve of a movement mechanism or ringing, or the like.

The control of lovemaking is important because it allows to limit the wear of the components, and to increase the reliability of the mechanisms.

Claims (12)

A watch cylinder assembly (1), comprising at least one torsion-mounted mainspring (2) mounted between a barrel drum (3) at a first end (21) and a surface (2) at a second end (22). receiving device (5) comprising a barrel plug (4) coaxial with said drum (3) about a pivot axis (D), characterized in that the maximum radius of said plug (4) with respect to said pivot axis (D) is less than nine times the maximum thickness of said spring (2), and further characterized in that said barrel assembly (1) comprises means for adjusting the longitudinal gap (6) between said barrel assembly (1 ) and at least one plate (10) or a bridge (11) carrying or carrying said barrel assembly (1), said adjustment means being either constituted by means for setting or limiting stroke, with respect to said plate (10) or said bridge (11), said drum (3) or / and a cover (7) fixed on said drum (3) to form with it a chamber (32) enclosing said spring (2), or constituted by pivoting guide means, directly in a said plate (10) and / or in a said bridge (11), said drum (3); ) or / and a cover (7) fixed on said drum (3) to form with it a chamber (32) enclosing said spring (2), or constituted by the combination of said means for setting or limiting stroke and said pivoting guide means, in the direction of said pivot axis (D), for limiting the play between said barrel assembly (1) and said at least one plate (10) or bridge (11). Barrel assembly (1) according to claim 1, characterized in that said adjustment means are constituted by means for setting or limiting stroke comprising a wedge washer (70) interposed between a said platinum (10) ) or a said bridge (11), and secondly said drum (3) or a cover (7) fixed on said drum (3) to form with it a chamber (32) enclosing said spring (2). Barrel assembly (1) according to claim 2, characterized in that said lock washer (70) is guided by a bearing surface (44) that includes said bung (4) Barrel assembly (1) according to claim 1, characterized in that said adjustment means are constituted by pivotally direct guiding means in a said plate (10) and / or in a said bridge (11) of said drum (3). ) and a cover (7) fixed on said drum (3) to form with it a chamber (32) enclosing said spring (2). Barrel assembly (1) according to claim 1, characterized in that said adjustment means are constituted by at least one projection (202) projecting from an outer surface (30) of said drum (3) facing a said platen (10). ) or a said bridge (11), or / and by at least one projection (102) projecting from an outer surface of a said plate (10) or a said bridge (11) that comprises the said assembly (1) ) and facing an outer surface (30) of said drum (3). Barrel assembly (1) according to claim 1, characterized in that said adjustment means are constituted by at least one projection (207) projecting from an outer surface (76) of a lid (7) fixed on said drum ( 3) to form with it a chamber (32) enclosing said spring (2), facing a said plate (10) or a said bridge (11), and / or by at least one projection (107) projecting from a outer surface of a said plate (10) or a said bridge (11) that comprises said assembly (1) and facing an outer surface (76) of a said cover (7). Barrel assembly (1) according to claim 5 or 6, characterized in that said adjustment means are completed by at least one projection (201) projecting from an outer surface (121) of a ratchet (12) carried by said bung (4) facing a said plate (10) or a said bridge (11), and / or by at least one projection (101) projecting from an external surface of a said plate (10) or a said bridge (11) that includes said assembly (1) and facing an outer surface (121) of said ratchet (12). Barrel assembly (1) according to one of the preceding claims, characterized in that said receiving surface (5) is a surface of revolution with respect to said pivot axis (D). Barrel assembly (1) according to one of the preceding claims, characterized in that said spring (2) is fixed to said bung (4) by friction. Barrel assembly (1) according to one of claims 1 to 8, characterized in that said spring (2) is welded or brazed to said bung (4) so as to form a monoblock spring-binder subassembly. Watchmaking movement (100) comprising at least one barrel assembly (1) according to one of the preceding claims for storing energy with an incorporated input, or else by a ratchet (12) mounted pivotally integral with said bung ( 4), or by a toothing drum (13) mounted pivotally integral with said drum (3), and an outlet constituted respectively, or by a toothing drum (13) mounted pivotally integral with said drum (3), or by a ratchet (12) pivotally mounted on said bung (4). Timepiece (1000) comprising at least one watch movement (100) according to claim 11 or / and at least one barrel assembly (1) according to one of claims 1 to 10 for storing energy with a an inlet constituted by either a ratchet (12) pivotably mounted to said bung (4), or by a toothing of drum (13) pivotably mounted to said drum (3), and an outlet constituted respectively, or by a toothing drum (13) mounted pivotally integral with said drum (3), or by a ratchet (12) mounted pivotally integral with said bung (4).

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