CH706404B1 - An equipped shaft comprising a smooth pendulum clock shaft and a clockwork movement comprising such an equipped shaft. - Google Patents

Abstract

The invention relates to an equipped shaft (1E) comprising a smooth shaft (11) clock balance. It comprises, driven on said shaft (11), a plate sleeve (60) carrying a notch (64), and a spacer sleeve (111) having a first lateral bearing surface (81) constituting an axial abutment support of a rocker to be mounted on a main bearing (65) cylindrical of said sleeve (111). The invention also relates to a pendulum equipped with a clock-bearing having a hub (20) is mounted on said main bearing (65), supported by a lateral surface on said first lateral surface (81), a pendulum assembly- spiral comprising such a balance equipped and clamped on said shaft (11) and in abutment abutment on a second lateral bearing surface (82) of said sleeve (111) facing the opposite side to said first bearing surface (81), a spiral shell (70) to which is attached a spiral spring, and a watchmaking assortment comprising such a set and an anchor, as well as a watch movement comprising at least one such assortment. , and a timepiece comprising at least one such movement.

Description

Description: [0001] The invention relates to an equipped shaft comprising a smooth shaft of a watch wheel.

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

The invention further relates to a sprung balance assembly comprising such a balance equipped with a tray notch in a tray sleeve.

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 [0008] In a conventional mechanism, a balance shaft carries a rocker fixed by a hub of its serge, and held in abutment on a face of a first side of a central plate that includes the 'tree. On this first side, beyond the hub, a ferrule fitted on the shaft near a first end of this shaft constitutes the mobile attachment point of a spiral spring also attached to a plate or a bridge . On the second side of the shaft opposite to that carrying the ferrule, the balance shaft carries, moving away from the middle plate, first of all a large plateau carrying a plateau pin which cooperates with the fork of an anchor, then a small plate having a notch cooperating with a sting of the same anchor to prevent the 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.

On many movements, anchor / pendulum shares are insufficient, which generates a risk of collision, and these shares are generally unbalanced.

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

It is therefore a question of finding a compromise between the operational 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 beam, 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.

US 2010/157 743 in the name of ROGER DUBUIS describes a particular fastening method of spiral to the ferrule with pairing of a spring to a pendulum, and the mounting of the balance spring on the balance with a collar selected from a collection of collars corresponding to different distances of fixing of the inner turn relative to the axis. The balance therefore comprises a removable collar for fixing the hairspring. This balance has a middle plate, on either side of which are supported, on one side the balance wheel beyond which is driven a ferrule, and a second side a socket with the two plates and the ankle.

The document CH 270 582 A in the name of BRENDLER describes a conical balance shaft on which is fitted a first sleeve which carries, on a first side, a rocker bearing on a first face of the first sleeve forming a first plate , and immobilized by a first rivet on the side of a first end of the shaft, the first rivur forming a second plate on which is supported a ferrule itself immobilized by a rivet at the first end of the first sleeve. The first bushing still carries, on a second side, a second bushing resting on a second face of the first bushing and carrier of the balance plates and immobilized by a rivet on the side of a second end of the first bushing and corresponding to a second end of the tree.

The document FR 1 216 100 A in the name of PIZON describes several executions of pendulums. In a first embodiment, a rocker has, on either side of a plate, a first side the rocker bearing on one side and immobilized by the shell driven on the shaft, and a second side a double tray mounted on a conical bearing of the shaft. The other embodiments comprise a bushing with a double monobloc plate with a plate carrying the balance bearing on a face of the plate on the opposite side to the plates, the shell is supported on one face of the sleeve without contact with the balance, and is mounted, as appropriate, directly on the sleeve or on a threaded shaft on which is mounted the sleeve.

The document CH 95 065 in the name of KOEHN describes a balance comprising, mounted on a smooth shaft single shoulder, a sleeve having, beyond the two plates, a bearing plate of the rocker immobilized by a rivet on the side opposite the trays, the ferrule being driven further on the sleeve.

The document CH 474 101 in the name of MADE BALANCIERS REUNIES described, fitted on a smooth shaft, a sleeve having a double plate, the large plate with the peg also serving as a direct support to the balance, which is immobilized from the opposite side by the ferrule driven on the socket.

The document GB 831 161 in the name of SMITH describes a monobloc balance, with, on one side of the serge, the ankle and the notch, and on the other side of the serge, an eccentric ferrule.

The document DE 2 427 021 SA1 in the name of EBAUCHES BETTLACH describes a balance shaft having a bearing plate of the notch, the beam of the skewer is supported on a face of the plate and carries the peg, the pendulum is held by the shell hunted on the tree.

The document US 1,423,446 to NEEDY describes several executions of pendulums. In a first embodiment, a shaft having a conical bearing surface supports a first bushing on which the rocker is held in abutment on a face opposite to the ferrule which bears on this first bushing, the first bushing is held on the conical shaft. locally threaded by a nut in a recess of the first socket, and a second socket with double plate and ellipse is fitted on a bearing of the shaft beyond the first sleeve. The other embodiment comprises a ring screwed on the shaft under the first sleeve for its maintenance.

The document CH 700 260 A2 in the name of CARTIER describes a one-piece shaft having a middle plate of a first side of which the beam of the skeigh is supported, and, beyond, the shell is fitted on another scope , the plate forming a large platform carrying the ankle and the shaft comprising the small plate of the second side opposite the balance. SUMMARY OF THE INVENTION [0024] The invention proposes to improve safety between an equipped balance-sprung assembly and an anchor escapement mechanism. 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 a given movement height, the invention aims to balance the share of the exhaust, and increase the security between the various components, to eliminate the risk of collisions.

The desired solution takes the greatest account of the cost of production, and strives to touch the minimum number of components.

For this purpose, the invention relates to an equipped shaft having a smooth shaft of a clockwork, characterized in that it comprises a plate sleeve carrying at least one tray notch, said tray sleeve being driven on a bearing surface of said smooth shaft, and in that said equipped shaft comprises a spacer bushing also driven on said bearing surface and having a first lateral bearing surface constituting an axial bearing abutment of a bare rocker to be mounted on a bearing main cylindrical that also includes said spacer sleeve.

The invention also relates to a pendulum clock equipped with a bare balance whose hub is mounted on such a shaft equipped, characterized in that said hub is mounted by a bore that comprises on said main bearing, in supported, by a lateral surface that it comprises, on said first lateral bearing surface.

The invention also relates to a sprung-balance assembly comprising such a balance equipped with a tray notch in the plateau bushing, characterized in that it comprises, mounted with clamping on said smooth shaft and abutment abutment on a second lateral bearing surface of said spacer sleeve, said second lateral bearing surface being turned on the opposite side to said first bearing surface, a spiral shell to which is attached at least one spiral spring, said sleeve spacing maintaining said hub and said ferrule at a distance from each other.

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 equipped shaft and comprises a set of 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 farther 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 in the same plane, and carrying the set of horns reported in a plane substantially parallel to that 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 carrying a first anchor stone, and an anchor bridge carrying a second anchor stone, between which stones is pivotally guided said anchor, said plate bearing a first shock-proof steering beam, and said movement comprising a balance bridge carrying a second shock-proof guide beam, between which anti-shock guides is pivotally guided said spiral-balance assembly, and in that said dart is closer than the horns of that of said anti-shock guides which is furthest from said spiral spring.

The invention also relates to a timepiece comprising at least one such clockwork movement. BRIEF DESCRIPTION OF THE DRAWINGS [0034] Other features and advantages of the invention will appear on reading the detailed description which follows, with reference to the appended drawings, in which: FIG. 1 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 pendulum assembly; spiral and an anchor escapement mechanism, with a first embodiment of a pendulum neighbor of the invention; fig. 2 represents, schematically, partially, and in section passing through its axis of pivoting, a second embodiment of balance adjacent to the invention; fig. 3 represents, schematically, partially, and in section passing through its axis of pivoting, a third embodiment of balance adjacent to the invention; fig. 4 and FIG. 5 show, schematically, partially, and in section passing through its pivot axis, respectively a fourth tray embodiment reported in FIG. 4, and a fifth embodiment with one-piece shaft with integrated plate in FIG. 5; fig. 6 shows, schematically, partially, and in section passing through its axis of pivoting, a sixth embodiment of adjacent balance of the invention; fig. 7 shows, schematically, partially, and in section passing through its axis of pivoting, a seventh embodiment of balance adjacent to the invention; fig. 8 represents, schematically, partially, and in section passing through its axis of pivoting, an eighth embodiment of a beam which is that of the invention; fig. 9 shows, schematically, partially, and in section passing through its axis of pivoting, a ninth embodiment of balance adjacent to the invention; fig. 10 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; fig. 11 shows, schematically, partially, and in section passing through its axis of pivoting, a tenth embodiment of balance adjacent to the invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0035] The invention relates to the field of watch mechanisms, and more particularly to the field of sets with sprung balance and anchor escapement mechanism.

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

The invention relates first of all to a clock balance shaft 1, illustrated by FIGS. 1 to 9, showing different embodiments, FIG. 8 illustrating the embodiment of the invention.

Here is called "shaft 1" monolithic axial component guided by pivots at the plate and the bridge, which supports the other components of the sprung balance. According to its morphology, this tree 1 takes on the figures the designations 11 (smooth) or 110 (stepped).

Here is called "equipped shaft 1E" a subassembly, kit or preassembled, ready to receive a balance and a spiral shell, and comprising at least: such a shaft 1, and a bushing plate 60 bearing at less a notch plate 64. In some embodiments, as visible in Figs. 6 to 9, the equipped shaft 1E further comprises components which are to be assembled together with the balance and the spiral shell: trim plate 89, spacer sleeve 111, spacer ring 208, the function of which will be explained further.

A "equipped balance 10" is a shaft 1E equipped on which is assembled a naked beam 2.

The term "sprung balance assembly 100" is a combination consisting of a balance equipped with 10 and at least one spiral 7.

Clock balance shaft 1 comprises, around a pivot axis D: a main surface 65 for the radial centering of a bare beam 2, and, connected to the main surface 65, a first lateral bearing surface 81 extending substantially radially to receive axially a bent beam 2, - a plateau surface 6 for the radial centering of a plateau sleeve 60. This plateau sleeve 60 is understood here as a socket carrying at least one tray notch. - A ferrule bearing 7 for the radial centering of a spiral shroud 70. According to the invention, the ferrule bearing 7 and the main bearing 65 are spaced apart from each other, and arranged to maintain at a distance from one another a ferrule 70 mounted on the ferrule bearing surface 7 and a bare rocker arm 2 mounted on the main bearing surface 65. And the shaft 1 comprises a second lateral bearing surface 82 for receiving in axial abutment a spiral shroud 70 mounted on the ferrule bearing 7. This second lateral bearing surface 82 is located at a plate located between the ferrule bearing 7 and the main bearing 65.

The various embodiments comprise a main bearing referenced 65 in FIGS. 2, 3, 8 and 9 where this main surface is provided on a component attached to this axis 11 or hub 110, this reported component being a plate bush 60 in FIGS. 2 and 3, or a spacer sleeve 111 in FIGS. 8 and 9. In either case, this main surface serves to radially center the hub 20 of a bare rocker 2. The shaft 1 comprises, connected to the bearing surface 65, a first lateral bearing surface . This first lateral bearing surface is referenced 81 in FIG. 1 and in FIGS. 6 to 9, where it is constituted by a lateral surface of a trim plate 89 or a spacer sleeve 111. In either case, this first lateral bearing surface extends substantially radially. , preferably radially perpendicular to the axis D of the shaft 1, to receive axially the hub 20 of a bare beam 2.

In all the embodiments 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 thereto, such as plate 8, trim plate 89, spacer sleeve 111, spacer ring 208, or insert plate bushing 60. These spacing means make it possible to avoid the support Directly of the ferrule 70 on the balance rod as in conventional 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. 1 and in FIGS. 6 to 9, where it constitutes the lateral surface of the trim plate 89 opposite the first lateral bearing surface 81.

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 thus proposes several configurations making it possible to bring the hub of the balance wheel and the plate together, by eliminating, in this zone, the traditional attitude between the serge and the plate, and to bring them as close as possible to one of the other, while ensuring the required security. The pure and simple removal of the plate is possible, but is not mandatory to fulfill the purpose of the invention. Indeed, the support surface function, traditionally assigned to the plate between hub and plate of the prior art, can be filled by other components as seen on the various embodiments.

Several configurations are possible for the reception of a hub 20 of the bare beam 2.

According to the invention, in FIG. 8, the shaft 1 is in two parts and has a spacing sleeve 111 between the ferrule bearing surface 7 and the bearing surface 6, the spacing sleeve 111 having a flange bearing plate and having the main bearing 65 and the first lateral bearing surface 81, the spacer bushing being driven over a rectilinear bearing surface 113 which comprises a rectilinear axis 11 between the main bearing surface 5 and the bearing surface 7, this trim plate 89 still having a second surface lateral support 82, and the spacer sleeve 111 constituting an axial stop for a plateau bushing 60 mounted on the plateau span 6.

The embodiment of the invention, of FIG. 8, relates to a shaft 1 having a rectilinear smooth shaft 11, on which is driven the ferrule 70, axially supported on a spacing sleeve 111. This spacing sleeve 111 comprises, under a flange forming a plate, the main span 65 radial support of the hub 20, and a first lateral bearing surface 81 for axial support of the hub 20, on the opposite side to the shell 70. The sleeve 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.

An advantageous embodiment of FIG. 8 is to fix the pin 62 on the bare balance 20, which saves the large plate 61, and to gain height axially, the spacing sleeve 111 then directly bearing on a bushing 60 limited to the small plate 63 provided with the notch 64.

In this embodiment of FIG. 8, the invention thus relates to an equipped shaft 1E comprising a smooth shaft 11 of a watch wheel, characterized in that it comprises a plateau bushing 60 carrying at least one plateau notch 64, this plateau bushing 60 being driven on a bearing surface 6 of the smooth shaft 11, and in that the equipped shaft 1E comprises a spacer sleeve 111 also driven on the bearing surface 6 and having a first lateral bearing surface 81 constituting an axial thrust bearing a naked beam 2 to be mounted on a main bearing 65 cylindrical that also includes the spacing sleeve 111.

In the embodiment of the invention illustrated in FIG. 8, the plateau sleeve 60 has a plateau pin 62.

In this embodiment of FIG. 8, the invention also relates to a pendulum equipped with a watchmaker 2 including a rocker 2 having a hub 20 is mounted on the shaft equipped 1 E, and the hub 20 is mounted by a bore 23 that has on the main scope 65, supported by a lateral surface on the first lateral bearing surface 81.

The spacing sleeve 111 is mounted in abutment abutment on the plateau bushing 60.

In a particular embodiment, not shown, the so-called plateau pin 62 is mounted on the hub 20.

In this embodiment of FIG. 8, the invention further relates to a sprung-balance assembly 100 comprising such an equipped balance 10 comprising a plate pin 62 and a plate notch 64. This balance-sprung assembly 100 comprises, mounted with clamping on the smooth shaft 11 and in abutment abutment on a second lateral bearing surface 82 of the spacer sleeve 111, the second lateral bearing surface 82 being turned away from the first bearing surface 81, a spiral shell 70 to which is attached at least one spiral spring 71, the spacer sleeve 111 holding the hub 20 and the ferrule 70 away from each other.

Naturally, the various embodiments illustrated lend themselves to a maintenance of the hub 20 by rivet, by local deformation of a plate bushing 60, or a collar 67, or a shoulder hub 110, or a spacing 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 bare beam 2 mounted on the main surface 5 or 65 as appropriate.

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 that it has 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 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 plateau bush 60 driven on a range of plate 6, and the notch plate 64 being formed on the shaft 1 or on a plateau sleeve 60 driven on the tray span 6.

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 balance 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 pendulum-balance assembly 100, and comprising such a pendulum equipped with a plateau pin 62 and a plateau notch 64, and further 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 alignment in the same plane, and being a carrier a set of horns 202 reported in a plane substantially parallel to that defined by the rod 204 and the sting 203.

The invention further 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 beam guide 308, and the movement 300 comprises a balance bridge 303 carrying a second shockproof beam guide 309. Between these shockproof guides 308, 309 is pivotally guided the balance-spiral assembly

Claims (8)

100, and the dart 203 is closer than the horns 202 of that of the shockproof guides 308, 309, which is farthest from the spiral spring 71. It is understood that the relative assembly 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 dart is reported parallel to the carrier fork of the horns in the same plane as that -this. 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 rod, 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 and positioning system 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 sharings and increasing the safety, between the large plate and the anchor rod, between the ankle and the dart, and between the dart and the plate, it is necessary to combine with the reversal of the the support of the balance 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 an action on two components only: the balance shaft and the anchor. The invention has the advantage of constituting an interchangeable solution set, that is to say that the new anchor, reversed from its usual position, and the pendulum according to the invention can be mounted in a movement that we propose to improve, without modifying other components. This notion of interchangeability is economically very important. 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 1. Equipped shaft (1E) comprising a smooth shaft (11) of a watch wheel, characterized in that it comprises a plate sleeve (60) carrying at least one tray notch (64), said tray sleeve ( 60) being driven on a bearing surface (6) of said smooth shaft (11), and in that said equipped shaft (1E) comprises a spacer sleeve (111) also driven on said bearing surface (6) and having a first lateral surface bearing (81) constituting an axial bearing abutment of a bare rocker (2) to be mounted on a main bearing (65) cylindrical that also comprises said spacer sleeve (111). 2. equipped shaft (1E) according to claim 1, characterized in that said tray sleeve (60) comprises a plate pin (62). 3. Equipped pendulum (10) comprising a balancer (2) whose hub (20) is mounted on a shaft (1E) according to claim 2, characterized in that said hub (20) is mounted by a bore (23) that it comprises on said main bearing (65), supported by a lateral surface that it comprises, on said first lateral bearing surface (81). 4. Equipped pendulum (10) according to claim 3, characterized in that the spacer sleeve (111) is mounted abutment abutment on the tray sleeve (60). 5. sprung balance assembly (100) comprising a balanced beam (10) according to claim 3 or 4 comprising a tray notch (64) in the tray bushing (60), characterized in that it comprises, mounted with clamping on said smooth shaft (11) and in abutment abutment on a second lateral bearing surface (82) of said spacer sleeve (111), said second lateral bearing surface (82) facing away from said first bearing surface (81), a spiral shell (70) to which is attached at least one spiral spring (71), said spacer sleeve (111) holding said hub (20) and said ferrule (70) to distance from each other. A watchmaking assortment (200) having a sprung balance assembly (100) according to claim 5, and including an anchor (201) arranged to cooperate with said tray peg (62) and said tray notch (64), characterized in that said anchor (201) is pivotally mounted about an anchor axis (DA) parallel to the pivot axis (D) of said equipped shaft (1 E) and comprises a set of horns (202) arranged to cooperate with said plate pin (62) as close as possible to said main span (65), and a pin (203) arranged to cooperate with said plate notch (64) furthest from said main span (65), 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 alignment in the same plane, and being carrying the set of horns (202) reported in a plane substantially parallel to that defined by said wand (204) and said dart (203). 7. Watch movement (300) comprising at least one assortment (200) according to claim 6, characterized in that it comprises a plate (301) carrying a first anchor stone (306), and a bridge an anchor (302) carrying a second anchor stone (307), between which stones (306; 307) is pivotally guided said anchor (201), said plate (301) carrying a first anti-shock beam guide ( 308), and said movement (300) comprising a rocker bridge (303) carrying a second shock-proof rocker guide (309), between which anti-shock guides (308; 309) is pivotally guided said sprung-balance assembly (100), and in that said dart (203) is closer than the horns (202) of one of said shock-proof guides (308; 309) which is furthest from said spiral spring (71). 8. Timepiece (1000) comprising at least one watch movement (300) according to claim 7.