CH706418A2 - watchmaking balancer shaft. - Google Patents

Abstract

The invention relates to a balance wheel shaft (1) comprising, around a pivot axis (D): a main bearing surface (5) of a rocker arm (2), a first lateral surface for radial bearing of said balance wheel (2), a bearing seat (6), a bearing (7) of a spiral hoop (70). Said ferrule bearing (7) and said main bearing (5) are spaced apart and keep said ferrule (70) and said rocker (2) at a distance, said shaft (1) having a second axial bearing surface (82) of said spiral shell (70), located at or at a plate (8) between said ferrule bearing (7) and said main bearing (5), or at a radial shoulder included therein shaft (1) beyond the projection of said main span (5) on said pivot axis (D).

Description

Field of the invention

The invention relates to a watch pendulum shaft, comprising, around a pivot axis: a main bearing for the radial centering of a rocker, and, connected to said main bearing, a first lateral bearing surface extending substantially radially to receive axially a said rocker, a plateau span for the radial centering of a plateau bush, a ferrule bearing for the radial centering of a spiral shell.

The invention also relates to a pendulum clock equipped with a bare balance wheel whose hub is mounted on such a shaft.

The invention further relates to a sprung balance assembly comprising such a balance equipped with a plateau pin and a plateau notch.

The invention also relates to a watchmaking assortment comprising such a sprung-balance assembly, and comprising an anchor arranged to cooperate with said plate pin and said tray notch.

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

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

The invention relates to the field of watch mechanisms, and more particularly the field of assortments with sprung balance and anchor escapement mechanism.

Background of the invention

In a conventional mechanism, a balance shaft carries a rocker fixed by its serge, and a ferrule constituting the movable attachment point of a spiral spring also attached to a plate or a bridge. On the opposite side to the one carrying the ferrule, the balance shaft carries, moving away from the balance beam serge, firstly a large plateau carrying a plateau pin which cooperates with the fork of an anchor, then a small plate with a notch cooperating with a sting of the same anchor to prevent accidental movements of the fork.

It is necessary to sufficiently size the safeties in the transverse direction of movement, that is to say parallel to the pivot axes of the balance and the anchor. Special attention must be paid to safety between the surface of the large plate facing the anchor, and the corresponding face of the anchor rod carrying the horns defining the anchor fork. It is the same between the end of the plateau pin, also called ellipse, and the face of the dart turned towards this ankle. The same attention must be paid to safety between the other side of the dart and the platinum carrier of the assortment.

It is understood that too large dimensioning of these safeties affects the total thickness of the movement, constant component section.

It is therefore to find a compromise between the operating safety, to avoid any risk of collision, and the total thickness of the movement.

The movement of components, to ensure safety, is not always easy, due to the presence of the various bridges, the balance rod, and other mechanisms with which there is a risk of interference , for example the date discs, which constitute a barrier prohibiting the movement of stones or incablocs to ensure these safeties, in particular because of the necessary security between the balance rod and the oscillating mass, which is provided by position sidewalks frozen, and which prohibit axially moving the balance rod.

Also, the conventional solution is to ensure security and sufficient sharing, to the detriment of the thickness of the movement.

Summary of the invention

The invention proposes to improve the safety between a balance-spiral assembly equipped and an escapement mechanism anchor. The design of a particular type of balance is intended to allow a better relative balancing of security and sharing between them. The invention has a versatile character, to be applicable to the transformation of existing movements, by modifying or replacing the smallest possible number of components. Finally, by the optimization it brings, the invention makes it easier to achieve extra-flat movements.

For this purpose, the invention relates to a watch balance shaft, comprising, around a pivot axis: a main bearing for the radial centering of a rocker, and, connected to said main bearing, a first lateral bearing surface extending substantially radially to receive axially a said rocker, a plateau span for the radial centering of a plateau bush, a ferrule bearing for the radial centering of a spiral shell, characterized in that said ferrule bearing and said main bearing are spaced apart from each other and arranged to keep at a distance one of the further a ferrule mounted on said ferrule scope and a rocker mounted on said main bearing and in that said shaft has a second lateral bearing surface for receiving in axial abutment a spiral ferrule mounted on said ferrule bearing, said second lateral bearing surface being located, or else at a leveling point situated between said ferrule bearing surface and said main bearing surface, or else at a radial shoulder that comprises said shaft beyond the projection of said main bearing surface on said pivot axis.

According to a feature of the invention, said shaft is integral and comprises a lateral abutment surface for receiving axial support of a pendulum plate socket mounted on said tray span, so as to maintain said sleeve of platform remote from a rocker mounted on said main surface and held in abutment on said first side surface.

According to a feature of the invention, one of its components comprises a lip of small section to form a locking rivet of a hub of a said beam mounted on said main scope.

The invention also relates to a pendulum clock equipped with a bare balance wheel whose hub is mounted on such a shaft, characterized in that said hub is mounted by a bore which comprises on said main bearing, in support by a first bearing surface on said first lateral bearing surface and held at a second face axially opposed to said first bearing face, or by a rivet resulting from a local deformation of a lip said shaft, or by an irreversible immobilization of said shaft on said hub at a fastening zone, said equipped balance comprising a plate pin and a plateau notch, said plate pin being mounted on said hub or on a tray sleeve driven on a said tray span, and said tray notch being provided on said shaft or on a tray socket driven on said plate reach water.

The invention also relates to a sprung-balance assembly comprising such a balance equipped with a plateau pin and a plateau notch, characterized in that it comprises, mounted with clamping on said shaft and abutment abutment on said second lateral surface, a spiral shell to which is attached at least one spiral spring.

The invention also relates to a watchmaking assortment comprising such a balance-spiral assembly, and comprising an anchor arranged to cooperate with said plate pin and said tray notch, characterized in that said anchor is pivotally mounted around an anchor axis parallel to the axis of pivoting of said shaft and comprises horns arranged to cooperate with said plate pin as close to said main span, and a dart arranged to cooperate with said plate notch at the furthest from said main span, and in that said anchor comprises a rod whose pivot defines said anchor axis, said rod carrying said dart in its alignment, and carrying a set of said horns reported in a substantially parallel plane to a plane defined by said rod and said dart.

The invention also relates to a watch movement comprising at least one such assortment, characterized in that it comprises a platinum carrier of a first anchor stone, and an anchor bridge carrying a second anchor stone, between which stones is guided in pivoting said anchor, said plate carrying a first shock-absorbing balance guide, and said movement comprising a balance bridge carrying a second anti-shock balance guide, between which anti-shock bearings shocks is guided in pivoting said sprung-balance assembly, and in that said dart is closer than said horns of said one of said shock-guiding which is furthest from said spiral spring.

The invention also relates to a watch movement comprising at least one such assortment, characterized in that it comprises a carrier plate of a first anchor stone, and an anchor bridge carrying a second anchor stone, between which stones is guided in pivoting said anchor, said plate carrying a first shock-absorbing balance guide, and said movement comprising a balance bridge carrying a second anti-shock balance guide, between which anti-shock bearings shocks is pivotally guided said sprung-balance assembly, and in that said dart is closer than said horns of said one of said shock-resistant guide which is farthest from said spiral spring.

The invention also relates to a timepiece comprising at least one such clockwork movement.

Brief description of the drawings

Other features and advantages of the invention will appear on reading the detailed description which follows, with reference to the accompanying drawings, in which: <tb> fig. 1 <sep> represents, schematically, partially, and in section passing through the axis of pivoting of a rocker arm and by the axis of pivoting of an anchor with which this pendulum cooperates, a clockwork movement comprising a sprung balance assembly and an anchor escapement mechanism, with a first preferred embodiment of a pendulum according to the invention; <tb> fig. 2 <sep> shows, schematically, partially, and in section passing through its axis of pivoting, a second variant of balance according to the invention; <tb> fig. 3 <sep> shows, schematically, partially, and in section passing through its pivot axis, a third embodiment of the balance according to the invention; <tb> fig. 4 and FIG. 5 <sep> show, schematically, partially, and in section passing through its pivot axis, respectively a fourth tray variant reported in FIG. 4, and a fifth variant with a one-piece shaft with a plate integrated in FIG. 5; <tb> fig. 6 <sep> shows, schematically, partially, and in section passing through its pivot axis, a sixth variant of the balance according to the invention; <tb> fig. 7 <sep> shows, schematically, partially, and in section passing through its axis of pivoting, a seventh pendulum variant according to the invention; <tb> fig. 8 <sep> represents, schematically, partially, and in section passing through its pivot axis, an eighth armature variant according to the invention; <tb> fig. 9 <sep> represents, schematically, partially, and in section passing through its axis of pivoting, a ninth pendulum variant according to the invention; <tb> fig. 10 <sep> represents, in the form of a block diagram, a timepiece comprising a clockwork movement with a balance-sprung assembly and an anchor escapement mechanism, with a balance according to the invention.

Detailed Description of the Preferred Embodiments

The invention relates to the field of watch mechanisms, and more particularly the field of assortments with sprung balance and anchor escapement mechanism.

The invention proposes to improve the safety between a balance-spiral assembly equipped and an escapement mechanism anchor.

The invention relates first of all to a clock balance shaft 1, illustrated by FIGS. 1 and 2 to 9, respectively presenting a first preferred variant and other non-limiting variants of the invention.

Clock balance shaft 1 comprises, around a pivot axis D: a main bearing surface 5 or 65 for the radial centering of a rocker 2, and, connected to the main bearing surface 5 or 65, a first lateral bearing surface 81 or 66 extending substantially radially to receive a rocker 2 in axial abutment , a plateau span 6 for the radial centering of a plateau bush 60, a ferrule bearing 7 for the radial centering of a spiral shell 70.

According to the invention, the scope of the shell 7 and the main surface 5 or 65 are spaced apart from each other, and arranged to maintain at a distance from one another a ferrule 70 mounted on the scope of shell 7 and a rocker 2 mounted on the main scope 5 or '65. And the shaft 1 comprises a second lateral bearing surface 82 or 68 for receiving in axial abutment a spiral shell 70 mounted on the bearing surface 7. This second lateral bearing surface 82 or 68 is located, or at the level of a plate 8 located between the ferrule bearing 7 and the main bearing 5 or 65, or at a radial shoulder that includes the shaft 1 beyond the projection of the main bearing 5 or 65, on the pivot axis D.

This tree 1 comprises: a main bearing 5 in FIGS. 1, 4, 5, 6 and 7, where this main surface is directly formed on an axis 11 or a shouldered hub 110 constituting the heart of the shaft 1. This main bearing is referenced 65 in FIGS. 2, 3, 8 and 9wherein this main bearing is provided on a component attached to this axle 11 or hub 110, this added component being a plate bushing 60 in FIGS. 2 and 3, or a spacer sleeve 111 in FIGS. 8 and 9. In either case, this main surface serves for the radial centering of the hub 20 of a rocker 2. The shaft 1 comprises, connected to the main span 5 or 65, a first lateral surface of 'support. This first lateral bearing surface is referenced 81 in FIG. 1 and in FIGS. 6 to 9, where it is constituted by a side surface of a collar called plate 8. This first bearing surface is referenced 66 in FIGS. 2 to 5. In either case, this first lateral bearing surface extends substantially radially, and preferably radially perpendicular to the pivot axis D of the shaft 1, to receive axial abutment the hub 20 of a balance 2, a plateau span 6 for the radial centering of a plateau bush a ferrule bearing 7 for the radial centering of a spiral shell 70.

In all the variants illustrated here, the balance shaft 1 is carrying spacing means, constituted either by a shoulder of an axis 11 or a shouldered hub 110 constituting the heart of this shaft 1, either by a component attached to the latter, such as plate 8, bushing 111, or reported plateau bushing 60. These spacing means make it possible to avoid the direct support of the ferrule 70 on the beam strut as in the classical configurations.

The shaft 1 comprises a second lateral bearing surface for receiving in axial abutment a spiral shell 70 mounted on the bearing surface 7. This second bearing surface is referenced 82 in FIG. 1and in figs. 6 to 9, where it constitutes the lateral surface of the plate 8 opposite to the first lateral bearing surface 81. The second lateral bearing surface is referenced 68 in FIGS. 2 to 5, where it is constituted, in FIGS. 2 and 3 by an end surface of a plate bush 60 driven on a straight axis 11, and in FIGS. 4 and 5 by a shoulder of a flange of a shouldered hub 110 specific to these variants.

The invention seeks to increase security. A classic obstacle, associated with a usual assembly with the successive stacking of a ferrule resting on a serge, itself resting on a plate in turn resting on a plateau bush, lies in the high bulk of the plate located between the serge and the plateau sleeve (or the large plateau of the plateau ankle). The invention therefore proposes several configurations to eliminate this attitude between the serge and the tray, and to bring them as close as possible to one another, while ensuring the required safety.

Several configurations are possible for the reception of a balance hub 20 2: - fig. 1illustrates a first mode with a shaft 1 which comprises a shouldered hub 110, which incorporates a plate-forming flange 8. One of the lateral surfaces of this plate 8 constitutes a first lateral bearing surface 81 for axial abutment support a balance rod 20 driven on the main bearing 5 of the shoulder hub 110. This main bearing 5 is immediately adjacent to this plate 8. The shouldered hub 110 further comprises a lateral abutment surface 9 for receiving axial support of a bushing The stopper side surface 9 is then arranged to hold the tray sleeve 60 away from the hub 20 of a rocker 2 mounted on the main bearing surface. and maintained in abutment on the first lateral surface 81, and in preventing any contact between this plate socket 60 and this rocker 2. In this variant of FIG. tray 60 does not participate in the positioning or maintenance of the hub 20, and may be independent of the shaft 1. It is the same for the variants illustrated in FIGS. 7 to 9, - in figs. 2 to 5, on the other hand, the plate bushing 60 is necessarily part of the rocker shaft 1, because it participates in the support of the hub 20. The plate bushing 60 is a component attached to a straight axis 11 on figs. 2 and 3, on a shouldered hub 110 in FIG. 4. In the variant of FIG. 5, the plateau sleeve, or at least the small plate 63, is integrated with such a stepped hub 110 which carries the hub 20 directly.

In the case of FIGS. 2 to 4, the shaft 1 is thus in two parts and comprises a tray bushing 60 driven on the tray span 6 that includes an axis 11, the plate 60 being arranged to constitute a bearing abutment of a mounted balance 2 on the main surface 5 and maintained in abutment on the first lateral surface 81.

In FIG. 2, as in fig. 3, the shaft 1 is in two parts and comprises a plate bush 60 driven on the tray span 6 that includes a straight axis 11, the plate 60 having a first lateral bearing surface 66 constituting a bearing abutment a rocker 2 mounted on the main bearing 65 which also comprises the plateau bushing 60.

In FIG. 4, the shaft 1 is in two parts and comprises a plate bush 60 driven on the tray surface 6 that comprises a shouldered hub 110, the plate 60 having a first lateral bearing surface 66 constituting a bearing abutment a rocker 2 mounted on the main surface 5 that includes a flange 67 of the shouldered hub 110.

The variant of FIG. It is distinguished from that of fig. 1, in that it has no attitude on the side of the shell 70, and that the only axial support of the hub 20 is on a bearing surface 66 of the hub shoulder 110. The shaft 1 is integral and comprises a shouldered hub 110 including a flange 61 has a first lateral bearing surface 66 constituting a bearing abutment of a rocker 2 mounted on the main bearing 5 which also includes the flange 61.

Preferably, to facilitate assembly, the tray centering surface 6 has a maximum diameter less than or equal to the minimum diameter of the main surface 5 or 65.

In the embodiment of FIGS. 2 to 4, a tray bushing 60 is driven on the tray span 6, and has at least the first bearing side surface 66 connected to the main span. This main scope is constituted, or in FIG. 4a main bearing 5 that includes a flange 67 protruding radially from the axis 11 as, or in FIGS. 2 and 3 by a bearing 65 that includes the plate 60 adjacent to the first lateral bearing surface 66.

In a preferred embodiment, the shaft 1 is integral and has a lateral abutment surface 9 for receiving axial support of a balance plate sleeve 60 mounted on the tray span 6, so as to maintain the tray sleeve 60 remote from a rocker 2 mounted on the main surface 5 and held in abutment on the first side surface 81.

Thus, in the first embodiment of FIG. 1, the shaft 1 is a shoulder hub 110 integral and comprises, on either side of the main span 5: a plate 8 of diameter greater than that of the main surface 5, having the first lateral surface 81 to receive axially a rocker 2, and the second lateral surface 82 to receive in axial abutment a spiral shell 70 mounted on the scope of ferrule 7, a lateral abutment surface 9 of diametral bulkiness less than or equal to that of the main surface 5, for the reception in support of a balance plate sleeve 60 mounted on the plateau surface 6.

[0043] Preferably, this tree 1 comprises: a first axial side 51 of the main bearing 5 which is arranged for centering a rocker 2 according to a pivot axis D of the shaft 1, and away from the main bearing 5: at least one tray surface 6 for centering at least one tray on the pivot axis D, the tray surface 6 being of diameter less than or equal to that of the main surface 5, first 3 pivoting guide means about the pivot axis D, whose diametral size is less than or equal to the diameter of the tray span 6, a second axial side 52, opposite to the first axial side 51, of the main bearing surface 5 and moving away from it: the ferrule bearing 7 for centering at least one spiral shell according to the pivot axis D, second 4 guide means pivoting about the pivot axis D, whose diametral size is less than or equal to the diameter of the ferrule scope 7.

Advantageously and specific to the invention: the first lateral bearing surface 81 which is arranged to abut the serge of a rocker 2, and the second lateral bearing surface 82 constitute two faces of the plate 8 opposite axially along the pivot axis D the abutment lateral surface 9 is projecting axially with respect to the main bearing 5 towards the tray span 6.

In a preferred embodiment, the main surface 5 comprises, a first axial side 51 facing the tray surface 6, a lip 53 of small section to constitute, by riveting or riveting or the like, a rivur 54 blocking a hub 20 of a rocker 2 mounted on the main bearing 5 abuts against the first side surface 81. FIG. 1 shows two details, with, to the left of the pivot axis D, the rivet 53 as it is manufactured, substantially parallel to the axis D, so as to allow the mounting of the hub 20 of the balance 2. To the right of the pivot axis D, this rivet, on the other hand, is shown in the folded-down position on the hub 20 under the reference 54. On these details, a discharge groove is seen allowing the material to creep during the formation operation of the river 54.

As an alternative to the formation of a rivet, it is possible to fix the balance rod by other means, in particular by clamping on the shaft or on the carrier component of the main bearing, by laser welding, by brazing, by bonding, by local deformation of the shaft or the main bearing bearing component, these methods being in no way limiting.

In the variants of FIGS. 2 to 4, to support the hub 20, the shaft 1 is in two parts and comprises a tray bushing 60 driven on the tray surface 6 that includes an axis 11.

In the case of FIG. 4, the hub 20 which carries the plate pin 62. The plate sleeve 60, which is attached to the axis 11, is arranged to constitute a bearing abutment of a rocker 2 mounted in radial support on the main bearing 5 of the axis 11, and maintained in axial support on a bearing surface 66 of a flange 61 of the plateau bushing 60, similar to the usual large plateau, but not carrying the plateau pin.

In figs. 2 and 3, the hub 20 is in radial abutment on a bearing surface 65 of the plate 60, and in axial bearing on a bearing surface 66 of a collar 61 of the plate bushing 60. This collar 61, in FIG. 2 constitutes the usual large plate bearing the pin 62. On the other hand, in FIG. 3, the flange does not constitute the usual large plate carrying the plate pin 62, since, similarly to the variant of FIG. 4, it is also the hub 20 which carries this pin 62 in this variant.

FIG. 5 illustrates a one-piece version with a stepped hub 110, integrated tray. The hub 20 carries the plate pin 62, and bears axially on a surface 66 of a flange 61 of the shouldered hub 110, and bears radially on a bearing surface 5 of this shouldered hub 110.

In the embodiments of FIGS. 1 and 2, the plate bushing 60 comprises a large plate 61 which carries a plate pin 62, and is integral with a small plate 63 having a plate notch 64 and further than it from the main bearing, referenced 5 in fig. 1, 65 in FIG. 2.

In the embodiments of FIGS. 3 and 4, the hub 20 of the rocker 2 carries a plateau pin 62. The plate 60 comprises a large plate 61 carrying the first lateral bearing surface 66, and which is integral with a small plate 63 having a notch 64 and further away from the main span 5, 65.

In FIG. 6, the shaft 1 is in two parts and comprises a plate 8 driven on a rectilinear range 113 that comprises a shouldered hub 110, between the main surface 5 and the ferrule bearing 7, the plate 8 having a first lateral surface of support 81 and a second lateral bearing surface 82. And the rectilinear bearing surface 113 comprises, from a first axial side 51 facing the tray span 6, a lip 53 of small section to constitute a locking rivet 54. a hub 20 of a rocker 2 mounted on the main surface 5. The shouldered hub 110 has a shoulder face 112 constituting an axial abutment for a plateau bushing 60 mounted on the plateau surface 6 that comprises the stepped hub 110.

The variant of FIG. 6comporte a trimmed plate 8 on a stepped hub 110. The spiral shell 70 is also driven on this shouldered hub 110, in axial support on the plate 8 which itself bears on the balance hub 20. This hub 20 is maintained on the opposite side by a rivet 54, as in the version of FIG. 1. An insert plate 60 insert, having a large plate 61 and a small plate 63 usual, is driven on the shouldered hub 110, bearing on a shoulder face 112.

In FIG. 7, the shaft 1 is in three parts and comprises, intended to be driven on a rectilinear range 113 that includes a rectilinear axis 11 on either side of a rocker 2 mounted on the main surface 5 of the rectilinear seat 113 , a plate 8 having a first lateral bearing surface 81 and a second lateral bearing surface 82, and a spacer ring 208 constituting an axial abutment for a plateau bushing 60 mounted on the bearing surface 6 of the scope rectilinear 113.

The variant of FIG. 7concerns a shaft 1 having a rectilinear smooth axis 11, on which are driven the ferrule 70, in axial support on the plate 8, itself in axial bearing on the hub 20, in axial support on a spacer ring 208 with an added plateau bush 60, comprising a large tray 61 and a small tray 63 usual, carrying the plateau pin 62 and the notch 64.

In FIG. 8, the shaft 1 is in two parts and has a spacing sleeve 111 between the ferrule bearing 7 and the tray bearing 6, the spacer sleeve 111 having a plate-like flange 8 having the main span 65 and the first lateral bearing surface 81, the spacer sleeve being driven on a rectilinear bearing surface 113 which comprises a rectilinear axis 11 between the main bearing surface 5 and the ferrule bearing surface 7, this plate 8 further comprising a second lateral bearing surface 82, and the spacer sleeve 111 constituting an axial stop for a plateau bushing 60 mounted on the plateau span 6.

The variant of FIG. 8concerne a shaft 1 having a rectilinear smooth axis 11, on which are driven the ferrule 70, axially supported on a spacing sleeve 111. This spacing sleeve 111 comprises, under a collar plate 8, the main span 65 d radial support of the hub 20, and a first lateral bearing surface 81 for the axial support of the hub 20, on the opposite side to the ferrule 70. The bushing 111 is axially supported on a reported plateau bushing 60, comprising a large tray 61 and a small tray 63 usual, carrying the plate pin 62 and the notch 64.

In FIG. 9, the shaft 1 is in three parts and comprises, driven side by side on a rectilinear bearing 113 that includes a straight axis 11, a plate 8 having a first lateral bearing surface 81 and a second lateral bearing surface 82 , and a spacer sleeve 111 carrying the main span 65, the spacer sleeve 111 constituting an axial stop for a plateau bushing 60 mounted on the plateau span 6.

The variant of FIG. 9concerne a shaft 1 having a rectilinear smooth axis 11, on which are driven the shell 70, in axial support on a plate 8, itself in axial support on a spacing sleeve 111. The plate 8 has the first lateral surface bearing 81 for the axial support of the hub 20, on the opposite side to the ferrule 70. The bushing 111 comprises the main bearing surface 65 of radial support of the hub 20, and is axially supported on a reported plateau bushing 60, comprising a large plate 61 and a small plate 63 usual, carrying the plate pin 62 and the notch 64.

Preferably, in order to facilitate assembly, the tray centering surface 6 has a maximum diameter less than or equal to the minimum diameter of the main surface 5, and the shaft 1 has a lateral abutment surface 9 with a diametrical space requirement. less than or equal to that of the main surface 5, for the reception in support of a rocker plate 60 mounted on the tray span 6.

Naturally, the various illustrated variants lend themselves to a maintenance of the hub 20 by rivet, by local deformation of a plateau bushing 60, or a flange 67, or a shoulder hub 110, or of a spacer sleeve 111, this immobilization mode being shown only in FIGS. 1 and 4 for the sake of clarity. Preferably, the components concerned comprise, in the naked state, a lip extending parallel to the axis D, intended to form this rivet. Thus, in a particular embodiment of the shaft 1, one of its components comprises a lip 53 of small section to form a rivet 54 for locking a hub 20 of a rocker 2 mounted on the main surface 5 or 65 depending on the case.

The invention also relates to a pendulum equipped with a watch wheel clock 2 having a hub 2 having a hub 20 is mounted on such a shaft 1. The hub 20 is mounted, driven, by a bore 23 which it comprises on the main bearing 5, supported by a first bearing surface 21 on the first lateral bearing surface 81 of the plate 8. In the preferred embodiment of FIG. 1, the hub 20 is held at a second face 22 axially opposed to the first bearing face 21, or by a rivet 54 resulting from a local deformation of a lip 53 of the shaft 1, or by an irreversible immobilization of the shaft 1 on the hub 20 at a fixing zone.

This equipped balance 10 comprises a plateau pin 62 and a plateau notch 64, the plateau pin 62 being mounted on the hub 20 or on a plate socket 60 driven on a plateau range 6, and the notch plate 64 being formed on the shaft 1 or on a plateau sleeve 60 driven on the tray span 6.

Preferably, the shaft 1 comprises a lateral abutment surface 9 protruding axially, along the axis of pivoting D, with respect to the rivet 54 or to the fixing zone, for the reception axially supported by a balance plate socket 60, or a large plate 61 that includes this sleeve 60 mounted with clamping on the tray span 6, so as to maintain the tray sleeve 60 away from a rocker 2 mounted on the main scope 5 and maintained in abutment on the first lateral surface 81.

In a particular embodiment, the hub 20 is held by an irreversible immobilization welded or brazed or bonded to the shaft 1.

The invention also relates to a sprung-balance assembly 100 comprising such a rocker equipped 10, having a plate pin 62 and a notch plate 64. It comprises, mounted with clamping on the shaft 1 and abutment abutment on the second lateral surface 82 or 68, a spiral shell 70 to which is attached at least one spiral spring 71.

The invention also relates to a watchmaking assortment 200 comprising such a sprung-balance assembly 100, and comprising such a pendulum equipped 10 carrying a plateau pin 62 and a plateau notch 64, and still comprising an anchor 201 arranged to cooperate with the plate pin 62 and the plate notch 64. The anchor 201 is pivotally mounted about an anchor axis DA parallel to the pivot axis D of the shaft 1 and comprises horns 202 arranged to cooperate with the plate pin 62 as close as possible to the main bearing surface 5, and a stinger 203 arranged to cooperate with the plate notch 64 at the furthest point from the main bearing surface 5.

Preferably, the anchor 201 comprises a rod 204, integral or not with its pivot 205 defining the anchor axis DA, the rod 204 being a carrier of the stinger 203 in its alignment, and being a carrier of a game horns 202 reported in a plane substantially parallel to a plane defined by the rod 204 and the sting 203.

The invention also relates to a watch movement 300 comprising at least one such assortment 200; it comprises a plate 301 carrying a first anchor stone 306, and an anchor bridge 302 carrying a second anchor stone 307, between which stones 306, 307, is guided in pivoting the anchor 201. The plate 301 carries a first anti-shock balance guide 308, and the movement 300 comprises a balance bridge 303 carrying a second balance shock-preventing guide 309. Between these anti-shock guides 308, 309 is guided in pivoting the 100 balance-sprung assembly, and the dart 203 is closer than the horns 202 of that of the anti-shock guides 308, 309, which is farthest from the spiral spring 71.

It is understood that the relative mounting of the dart and horns according to the invention, where the horns are mounted remotely, in a plane parallel to that of the fork which carries the dart, is the opposite of the usual assembly where the sting is reported parallel to the fork carrying the horns in the same plane as this one.

The invention also relates to a timepiece 1000 comprising at least one such watch movement 300.

The provisions relating to the maintenance of the balance beam, by the plate thus arranged according to FIGS. 1 or 6 to 9, or by the trays of FIGS. 2 to 4, allow to reverse the fixing system and positioning of 180 ° compared to the prior art. Without changing the positioning of the bridges, it is thus possible to increase the safety, especially between the balance rod and the oscillating weight, without increasing the height of the movement. To achieve the goal of balancing the sharing and increasing safety, between the large plate and the anchor rod, between the ellipse and the dart, and between the dart and the plate, it is necessary to combine the reversal of the support of the pendulum on its tree, the relative reversal of the positions of the dart and the horns on the anchor. This combination alone makes it possible to keep the relative positions of the other components of the movement: bridges, oscillating weight, date disc, incablocs.

The invention provides an economical solution to the control of the height of the movement, while ensuring high values of security and sharing, since it requires action on only two components: the balance shaft and the anchor.

The invention thus facilitates the production of ultra-flat movements, with components as rigid as in conventional movements, and without any risk during walking.

Claims (18)

1. Clock balance shaft (1) comprising, around a pivot axis (D): A main bearing surface (5; 65) for the radial centering of a rocker arm (2), and connected to said main bearing surface (5; 65), a first bearing surface (81; 66) extending substantially radially to receive in axial abutment a said pendulum (2), A plateau span (6) for the radial centering of a plateau bush (60), - a ferrule bearing (7) for the radial centering of a spiral shell (70), characterized in that said ferrule bearing (7) and said main bearing (5; 65) are spaced from each other and arranged to keep a ferrule (70) apart from each other (70). mounted on said ferrule bearing (7) and a rocker (2) mounted on said main bearing (5; 65) and in that said shaft (1) has a second lateral bearing surface (82; 68) for receiving axial stop a spiral shell (70) mounted on said ferrule bearing (7), said second lateral bearing surface (82; 68) being located, or at a plate (8) located between said bearing surface ferrule (7) and said main bearing (5; 65), or else at a radial shoulder that includes said shaft (1) beyond the projection of said main bearing (5; 65), on said axis pivoting (D). 2. Shaft (1) balance according to claim 1, characterized in that said shaft (1) is integral and has a lateral abutment surface (9) for receiving axial support of a balance plate bushing (60 ) mounted on said tray surface (6), so as to hold said tray sleeve (60) away from a rocker (2) mounted on said main bearing (5) and held in abutment on said first lateral surface (81); ). 3. Shaft (1) balance according to claim 1, characterized in that said shaft (1) is in two parts and comprises a tray sleeve (60) driven on said tray surface (6) that comprises a straight axis ( 11), said plate (60) having a first lateral bearing surface (66) constituting a bearing stop of a rocker (2) mounted on said main bearing (65) which also comprises said tray sleeve (60) . 4. shaft (1) beam according to claim 1, characterized in that said shaft (1) is in two parts and comprises a tray sleeve (60) driven on said tray surface (6) that comprises a stepped hub ( 110), said plate (60) having a first lateral bearing surface (66) constituting a bearing stop of a rocker (2) mounted on said main bearing (5) that comprises a collar (67) of said hub shouldered (110). 5. shaft (1) balance according to claim 1, characterized in that said shaft (1) is integral and comprises a shouldered hub (110), a flange (61) comprises a first bearing surface (66) constituting a support abutment of a rocker (2) mounted on said main bearing (5) also comprises said flange (61). 6. shaft (1) beam according to claim 1, characterized in that said shaft (1) is in two parts and comprises a plate (8) driven on a rectilinear range (113) that comprises a stepped hub (110), between said main surface (5) and said shell surface (7), said plate (8) having a said first lateral bearing surface (81) and a said second lateral bearing surface (82), and in that said rectilinear bearing (113) comprises, from a first axial side (51) facing said tray span (6), a lip (53) of small section to form a rivet (54) for blocking a hub (20). ) of said pendulum (2) mounted on said main bearing (5), and said shouldered hub (110) having a shoulder face (112) constituting an axial stop for a plateau bushing (60) mounted on said bearing plate (6) that includes said stepped hub (110). Balance shaft (1) according to claim 1, characterized in that said shaft (1) is in two parts and comprises a spacer sleeve (111) between said ferrule bearing (7) and said shelf span ( 6), said spacer sleeve (111) having a plate-like flange (8) having said main span (65) and said first lateral bearing surface (81), said spacer sleeve being driven in a rectilinear range ( 113) which comprises a rectilinear axis (11) between said main surface (5) and said shell surface (7), said plate (8) also comprising a said second lateral bearing surface (82), and said socket spacing (111) constituting an axial stop for a tray bushing (60) mounted on said tray span (6). 8. Shaft (1) balance according to claim 1, characterized in that said shaft (1) is in three parts and comprises, driven side by side on a rectilinear bearing (113) that comprises a rectilinear axis (11), a plate (8) comprising a said first lateral bearing surface (81) and a said second lateral bearing surface (82), and a spacing bushing (111) carrying said main bearing surface (65), said bushing spacer (111) constituting an axial stop for a tray bushing (60) mounted on said tray span (6). 9. Shaft (1) balance according to claim 1, characterized in that said shaft (1) is in three parts and comprises, intended to be driven on a rectilinear bearing (113) that comprises a straight axis (11) from and other a balance (2) mounted on said main surface (5) of said rectilinear seat (113), a plate (8) having a said first lateral bearing surface (81) and a said second lateral surface bearing (82), and a spacer ring (208) constituting an axial stop for a tray bushing (60) mounted on said tray span (6) of said rectilinear bearing (113). Balance shaft (1) according to one of the preceding claims, characterized in that said tray centering surface (6) has a maximum diameter less than or equal to the minimum diameter of said main span (5), and it comprises a lateral abutment surface (9) of diametral bulkiness less than or equal to that of said main surface (5), for reception in support of a rocker plate (60) mounted on said tray span (6). 11. Clock balance shaft (1) according to one of the preceding claims, characterized in that one of its components comprises a lip (53) of small section to form a rivet (54) of locking a hub (20) of said pendulum (2) mounted on said main bearing (5; 65). Clock equipped with clock (10) comprising a bare rocker (2), a hub (20) of which is mounted on a shaft (1) according to one of claims 1 to 11, characterized in that said hub (20) is mounted by a bore (23) which it comprises on said main bearing surface (5), supported by a first bearing face (21) on said first lateral support surface (81) and maintained at the level of a second face (22) axially opposed to said first bearing face (21), or by a rivet (54) resulting from a local deformation of a lip (53) of said shaft (1), or by a irreversibly immobilizing said shaft (1) on said hub (20) at an attachment zone, said equipped rocker (10) having a plateau pin (62) and a plateau notch (64), said plateau pin ( 62) being mounted on said hub (20) or on a tray sleeve (60) driven on a said tray span (6), and said plate notch water (64) being provided on said shaft (1) or on a tray sleeve (60) driven on said tray span (6). Equipped balance wheel (10) according to the preceding claim, characterized in that said shaft (1) comprises a lateral abutment surface (9) protruding axially along said pivot axis (D), relative to said rivet (54). or to said attachment zone, for axially bearing receiving a rocker plate bushing (60) mounted on said plateau span (6), so as to maintain said plateau bushing (60) at a distance from a rocker (2) mounted on said main bearing (5) and held in abutment on said first lateral surface (81). 14. equipped balance (10) according to one of claims 12 or 13, characterized in that said hub (20) is held by an irreversible immobilization welded or brazed or bonded to said shaft (1). 15. Spiral balance assembly (100) comprising a balanced beam (10) according to one of claims 12 to 14 comprising a plateau pin (62) and a plateau notch (64), characterized in that it comprises, mounted with clamping on said shaft (1) and abutting abutment on said second lateral surface (82), a spiral shell (70) to which is attached at least one spiral spring (71) 16. Assortment of timepieces (200) comprising a sprung balance assembly (100) according to the preceding claim, and comprising an anchor (201) arranged to cooperate with said plate pin (62) and said notch plate (64), characterized in that said anchor (201) is pivotally mounted about an anchor axis (DA) parallel to the pivot axis (D) of said shaft (1) and comprises horns (202) arranged to cooperate with said a plateau pin (62) nearest said main span (5), and a stinger (203) arranged to cooperate with said plateau notch (64) furthest from said main span (5), and in that said anchor (201) comprises a rod (204) whose pivot (205) defines said anchor axis (DA), said rod (204) carrying said dart (203) in its alignment, and carrying a set of said horns (202) attached in a plane substantially parallel to a plane defined by said rod (204) ) and said dart (203). 17. Watch movement (300) comprising at least one assortment (200) according to the preceding claim, characterized in that it comprises a plate (301) carrying a first anchor stone (306), and a bridge anchor (302) carrying a second anchor stone (307), between which stones (306; 307) is guided in pivoting said anchor (201), said plate (301) carrying a first anti-shock guide of balance wheel (308), and said movement (300) comprising a balance bridge (303) bearing a second balance shock-preventing guide (309), between which anti-shock guides (308; 309) is pivotally guided said pendulum assembly -spiral (100), and in that said dart (203) is closer than said horns (202) of said one of said shock-guiding (308; 309) which is furthest from said spiral spring (71). 18. Timepiece (1000) comprising at least one watch movement (300) according to the preceding claim.