EP3889688B1 - Motor member for a timepiece - Google Patents

Motor member for a timepiece Download PDF

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Publication number
EP3889688B1
EP3889688B1 EP21168538.3A EP21168538A EP3889688B1 EP 3889688 B1 EP3889688 B1 EP 3889688B1 EP 21168538 A EP21168538 A EP 21168538A EP 3889688 B1 EP3889688 B1 EP 3889688B1
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EP
European Patent Office
Prior art keywords
drum
organ
timepiece
drive
fixed element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP21168538.3A
Other languages
German (de)
French (fr)
Other versions
EP3889688A1 (en
Inventor
Gilles Parquet
Fabien GRIVET
Vasco BELO
Bruno Herrera
Matthijs VAN STRAATEN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Richemont International SA
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Richemont International SA
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Publication date
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Publication of EP3889688A1 publication Critical patent/EP3889688A1/en
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Publication of EP3889688B1 publication Critical patent/EP3889688B1/en
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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B1/00—Driving mechanisms
    • G04B1/10—Driving mechanisms with mainspring
    • G04B1/16—Barrels; Arbors; Barrel axles
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B1/00—Driving mechanisms
    • G04B1/10—Driving mechanisms with mainspring
    • G04B1/14—Mainsprings; Bridles therefor
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B1/00—Driving mechanisms
    • G04B1/10—Driving mechanisms with mainspring
    • G04B1/18—Constructions for connecting the ends of the mainsprings with the barrel or the arbor
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B33/00—Calibers
    • G04B33/06—Calibers of extremely flat shape
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B33/00—Calibers
    • G04B33/14—Calibers of which the mainsprings or barrels are easily removable
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B29/00—Frameworks
    • G04B29/02—Plates; Bridges; Cocks
    • G04B29/022—Bridges

Definitions

  • the present invention relates to the field of watchmaking. It relates, more particularly, to a motor member of reduced size.
  • a barrel comprises a hollow drum comprising a cylindrical wall closed on one side by a bottom made integral with it, and on the other side by a cover, in order to form a housing for a spiral spring.
  • the outer end of the spiral spring is linked by a fixed or sliding flange to the cylindrical wall of the drum, and the inner end of the spring is linked to a bung associated with a barrel arbor.
  • the outer wall of the drum is typically provided with a toothing in order to drive a going train, and the shaft is integral with a ratchet wheel, which is used for winding the spring. It is also known to drive the going train via the shaft and wind the spring via the drum.
  • smooth drums, devoid of teeth are known, which drive the going train via a chain and a spindle system.
  • the conventional cylinder mentioned above is mounted on the frame by its center, in particular directly or indirectly via the shaft.
  • This arrangement is relatively bulky, and requires a certain height between the frame elements located on either side of the barrel in order to ensure that the barrel does not come into contact with neighboring components.
  • the patent CH26510 omits the cover of the drum, the housing for the spring being delimited on one side by the bottom of the drum, and on the other side by a frame element of the movement, in particular the plate.
  • the motor member of this document proposes a drum also closed on one side by a frame element, in which the shaft is made in one piece with a wheel which is located completely within the thickness of this frame element, in a recess provided in the latter.
  • the drums of all the embodiments mentioned above are supported by their center, which requires that the drum has a bottom integral with its side wall.
  • the document CH 334702 reveals several variants of barrels in which the drum consists of a ring guided at its peripheral wall by means of three pairs of rollers distributed around the periphery of the drum. This drum has neither cover or back, and the housing for the mainspring is defined on its lower and upper faces by bridges of the movement frame.
  • the barrels disclosed in the latter document lead to a significant reduction in height compared to a conventional barrel, the use of pairs of rollers located around the drum increases the diameter of the barrel, and increases the complexity of the motor member. Furthermore, the rollers are rotatable, and therefore require axes of rotation. There are therefore four axes (the arbor and those of the three pairs of rollers) which must be well aligned when mounting the barrel bridge on the plate, which causes some difficulty in mounting it.
  • the document FR 2229087 reveals a drive member in which the drum is supported radially by a recess formed in the bottom of the case, this bottom serving as a frame element.
  • the drum is open on both sides, and the housing thus defined to house the spring is closed on the one hand by the bottom and on the other hand by the toothed wheel.
  • This arrangement is even simpler and more compact than those mentioned above, but the gear wheel is supported on both sides. The compactness of the motor member as well as its simplicity can therefore be further improved.
  • An object of the invention is therefore to provide a motor member in which the aforementioned defects are at least partially overcome.
  • the invention relates to a motor member for a timepiece which comprises a mainspring such as a spiral spring, and a drum delimiting an outer wall of a housing housing said mainspring.
  • the outer end of the mainspring is linked to the drum, which is arranged to pivot around an axis of rotation.
  • the drum has the shape of a toothed annular crown.
  • the drive member further comprises a toothed wheel, which can for example serve as a ratchet wheel, secured to a bung to which an inner end of said mainspring is connected.
  • a toothed wheel which can for example serve as a ratchet wheel, secured to a bung to which an inner end of said mainspring is connected.
  • One face of said housing is intended to be defined by a fixed element of said timepiece against which said drum is intended to be mounted, such as a frame element, a back cover, or a crystal.
  • said plug and said toothed wheel are made in one piece.
  • This construction leads to a significant reduction in size compared to barrels of the prior art.
  • the separate drain is thus rendered superfluous, which reduces the number of parts.
  • the toothed wheel and the plug are manufactured in such a way monobloc makes it possible to bring the wheel closer to the drum, without having to leave room to compensate for the tolerances necessary when using two separate parts integral with each other.
  • drum and said mainspring also come in one piece, which reduces the number of parts of the motor member and facilitates its assembly.
  • the other face of said housing that is to say the one opposite the fixed element, is defined by said toothed wheel, which minimizes the number of components and support elements necessary for the construction of the driving member, and therefore increases its simplicity and compactness.
  • said drum is positioned and guided radially and axially via a barrel bridge.
  • the barrel bridge may comprise at least one guide member projecting from said barrel bridge in a direction substantially parallel to said axis of rotation, and therefore perpendicular to the plane of the motor member.
  • At least one guide member is preferably fixed, but can also be mobile.
  • a compact guide system is thus proposed, which is easy to mount because the guide elements are carried by the barrel bridge and therefore do not require any additional support.
  • the drum may comprise a shoulder arranged to abut against the latter in order to position it radially and axially with respect to the bridge.
  • said at least one guide member can fit entirely inside a locus consisting of a cylinder of infinite height whose diameter is defined by the peaks of the teeth of said drum. In other words, the guide member does not extend radially beyond the tops of the teeth of the drum.
  • said at least one guide member may comprise a plurality of studs, preferably made of stone.
  • studs which are simple fixed elements which do not rotate, does not require any axis of rotation for the guide member(s), which makes the assembly simple and easy to implement.
  • ball rollers or the like can be used, at the cost of increased complexity and component count.
  • said drum may comprise a plurality of stones or guide studs intended to abut against said fixed element.
  • a low friction drum stop system is thus proposed.
  • said drum is supported by a ball bearing.
  • the friction undergone by the drum during its rotations can therefore be minimized, while keeping the thickness of the drive member to a minimum.
  • the ball bearing can be bidirectional or unidirectional. This last possibility allows the drum to operate as a ratchet, without requiring any pawl, for the case where the driving member is wound up by the drum.
  • said ball bearing comprises a first groove located on the outer wall of said drum and a second groove facing said first groove, said second groove being located on the inner wall of an outer ring arranged to be fixed to said fixed element. , the grooves thus defining an annular cavity. A plurality of balls are housed in this annular cavity. A compact construction is thus proposed.
  • the motor member as defined above is integrated into a clock movement that comprises said fixed element.
  • said toothed wheel can be pivotally mounted on a fixed shaft extending from the fixed element or from the barrel bridge.
  • said fixed element can be a frame element of a timepiece movement of said timepiece such as a plate or a bridge, or a crystal that includes a timepiece on the back side or on the dial side, or else a bottom that includes said timepiece.
  • said barrel bridge can be integrated into a frame element or into a back that includes said timepiece.
  • THE figures 1 to 7 represent a first variant of a motor member 1 according to the invention.
  • Motor member 1 is mounted on a fixed element 3 of a timepiece in which the motor member is implemented.
  • This fixed element 3 can be a plate or a bridge, or else a bottom on which the motor member 1 is directly or indirectly mounted.
  • the drive member comprises a drum 5 having peripheral toothing 6.
  • This drum 5 has no cover and bottom, and defines a cylindrical housing in which is arranged a mainspring 7.
  • the latter is of conventional shape, spiral, and is linked at its outer end to the inner wall of the drum 5, and at its inner end to a bung 9.
  • the latter came in one piece with a toothed wheel 11 which serves as a ratchet wheel in the illustrated embodiment, but which can also be used to drive the gears, the drum 5 serving as a ratchet in such a case.
  • the toothed wheel 11 extends superimposed on the spring 7, and serves as a barrel cover, but the bung can be made of a separate piece secured to the toothed wheel 11.
  • the plug 9 is pivoted around a fixed shaft 13, and is held on the latter by means of a screw 15 or the like which bears against the fixed shaft 13
  • the plug 9 comprises a hook 9a for connection with the inner end of the mainspring 7 formed directly in the plug 9, for example by means of wire spark erosion or sinking. Alternatively, it can be made by broaching or traditional milling.
  • the toothed wheel 11 acts as a cover for the barrel, which is not integral in rotation with the drum 5, as known for example in the document CH 28684 .
  • the drum 5 On its side opposite to the toothed wheel 11, the barrel is closed by a surface of the fixed element 3.
  • the drum 5 as such has no bottom and cover, and is only a simple toothed ring.
  • the drum 5 is positioned axially and radially by guide elements 17 distributed around the periphery of the drum 5.
  • these guide elements 17 are, in the variant shown, studs, made here in the form of stones, driven into a barrel bridge 19, and which abut against a shoulder 21 provided on the drum 5.
  • An advantage of using of stones, such as rubies, for studs is the low coefficient of friction of this material, but other materials are possible.
  • the studs 17 can be made of hard metal, polymer or ceramic, and, in the case of metal, can be integral with the barrel bridge 19.
  • the studs can be replaced by a continuous or discontinuous surface of the barrel bridge 19, or by ball bearings.
  • the studs 17 extend from the barrel bridge 19 in a direction parallel to the axis of rotation of the drum 5, and do not extend radially beyond the peripheral toothing 6 of the drum 5. Indeed, the elements of guide 17 are inscribed in the diameter of the drum 5, which reduces the size in the plane of the drum 5 with respect to the document CH 334702 aforementioned.
  • the drum 5 can simply abut against the surface of the fixed element 3 and slide on the latter during its pivoting.
  • the drum 5 comprises guide stones 23 driven into corresponding housings and extending in the direction of the fixed part 3. These guide stones reduce the contact surface between the drum 5 and the part fixed 3 as well as the coefficient of friction.
  • the barrel bridge 19 also comprises a winding pawl 25 which cooperates in a known manner with the toothing of the toothed wheel 11. Furthermore, the underside of the barrel bridge 19 comprises a recess 27 which serves to allow a mobile of the going train (not shown) to mesh with peripheral toothing 6 of drum 5.
  • Barrel bridge 19 is fixed to fixed element 3 by means of screws 29 engaged in threaded tubes 31, which project from the upper face of fixed element 3. These tubes 31 serve as than studs of centering for the barrel bridge 19, and ensure its positioning on the fixed element 3.
  • the bridge can be fixed to the fixed element 3 by means of other fixing methods such as clipping, riveting or gluing.
  • FIG. 8 to 10 illustrate a second variant of a motor member 1 according to the invention. This variant differs from that of figures 1 to 7 chiefly in that its construction is the reverse of that of the latter.
  • the fixed element 3 is a crystal, which can be located either on the dial side or on the back side, and delimits the housing of the mainspring 7 on one of its sides.
  • the barrel bridge 19 can be a separate element, secured to the plate or to the back, or can come in one piece with one of these.
  • bridge used rather means a functional part of the structure of the engine member 1 which can be part of another element such as a plate or a bottom
  • the barrel bridge 19 of this variant comprises a hollow 20 in its bottom, in which the toothed wheel 11 is located, which is pivoted around a fixed shaft 13 that comprises said bridge 19.
  • the axial positioning of the toothed wheel 11 is secured on one side by a stop 33, and on the other side by the glass 3.
  • the drum 5 is superimposed on the toothed wheel 11, and is guided in rotation and axially by guide elements 17 similar to those of the first variant, and which also extend from the barrel bridge 19 in the direction of the fixed element 3 in a direction parallel to the axis of rotation of the drum 5.
  • the guide elements 17 cooperate with the shoulder 21 located on the drum 5 in order to ensure the positioning of the latter.
  • the guide elements 17 are located in blind holes 35 which are deeper than necessary to receive the guide elements 17 in order to allow the watchmaker to adjust the height of the latter according to his needs.
  • the blind holes 35 may have a sufficient depth to receive the guide elements 17 to the bottom of the holes 35.
  • the axial positioning of the toothed wheel 11 can be ensured not by the glass 3, but by the drum 5 which can serve as an axial stop.
  • FIG 11 illustrates a variant of the drum 5 and of the mainspring 7 which can be implemented in connection with all the aforementioned embodiments.
  • the drum 5 as well as the mainspring 7 form a one-piece assembly, made in one piece.
  • the inner end of the mainspring 7 also includes a ferrule 7a allowing a kinematic connection with the toothed wheel 11, but this ferrule 7a can of course be omitted.
  • the ferrule comprises a polygonal opening, but other known shapes are also possible.
  • a mainspring 7 of this type can be made of metal, or of silicon-based material (for example amorphous, monocrystalline or polycrystalline silicon, its mono- or polycrystalline oxide, carbide or nitride), alumina, polymer , a composite or the like.
  • silicon-based material for example amorphous, monocrystalline or polycrystalline silicon, its mono- or polycrystalline oxide, carbide or nitride, alumina, polymer , a composite or the like.
  • the construction of the motor member 1 of the invention comprises many contact surfaces between moving parts, it could be advantageous to provide a polishing or fine diamond grinding of the contact surfaces, or to carry out a surface treatment such as as a deposit of DLC (carbon in the form of diamond), nanostructuring, teflon coating, electroplating or ion implantation on one or more surfaces intended to be subjected to friction.
  • a surface treatment such as as a deposit of DLC (carbon in the form of diamond), nanostructuring, teflon coating, electroplating or ion implantation on one or more surfaces intended to be subjected to friction.
  • THE figures 12 to 14 further illustrate a variant of a motor member 1 according to the invention.
  • the toothed wheel 11 is supported on a fixed shaft 13 in a manner similar to the variant of the figures 1 to 3 , and the housing for the mainspring is defined on both sides by the toothed wheel 11 as well as a fixed element 3 of the timepiece, such as a frame element.
  • the drum 5 is maintained in its axial and radial positions by means of a ball bearing 37.
  • This ball bearing 37 consists of a first groove 38a provided on the outer wall of the drum 5, and of a second groove 38b formed in the inner face of an outer ring 39.
  • the two grooves 38a, 38b face each other in order to define a cavity, and balls (not shown) take place in this cavity in a generally known way.
  • the first groove 38a is formed by a first bevelled surface 5a provided on the outer face of the drum 5, which is adjacent to a second bevelled surface 41a with which an inner ring 41 is provided. , welded or otherwise secured to the outer face of the drum 5, but it is also possible to form the first groove 38a directly in the body of the drum 5, which would therefore be in one piece.
  • the outer ring 39 is held in place by a bridge 19 as well as screws 43, which hold it against a shoulder 45 provided on the fixed element 3 to which it is thus fixed.
  • the drum 5 is thus suspended by the ball bearing 37, and does not come into contact either with the fixed element 3, or with the toothed wheel 11. Consequently, and contrary to the other variants described above, no member additional guidance is required. The friction undergone by the drum during its pivoting can thus be reduced to a minimum value. Moreover, this variant has an exceptionally thin thickness.
  • THE figures 12 to 14 also illustrate the arrangement of the gears with the toothed wheel 11 and with the drum 5.
  • a reference 47 which is in the same plane as the toothed wheel 11 which meshes with the latter, as well as another reference 49 which is in the same plane as the teeth 6 of the drum 5 and also meshes with it.
  • the references 47, 49 therefore pass on either side of the outer ring 39.
  • the motor member can be wound up by the drum 5 without requiring any ratchet, thereby reducing the number of components used in construction. Furthermore, this arrangement eliminates the overtension during the winding of the mainspring 7 through the dead angle of a one-way bearing.
  • THE figures 15 to 16 illustrate an additional variant of a motor member 1 according to the invention.
  • This variant differs from that of figures 1 to 7 mainly in that the drum 5 is positioned radially by guide elements carried or integral with the fixed element 3, and axially on the one hand by the fixed element 3, on the other hand by the toothed wheel 11.
  • the fixed element 3 comprises a recess 22 in which the drum 5 is placed.
  • the side wall 22a of this recess 22 forms a guide element making it possible to position the drum 5 radially and to limit the position of the drum 5 axially in a first direction.
  • Other shapes of guide elements are also possible, such as for example studs integral with the fixed element 3 which take place in a circular groove provided in the underside of the drum 5 or vice versa, or a system of one or several circular grooves or rails distributed between the fixed element 3 and the drum 5, which interact for the same purpose.
  • the drum 5 simply abuts against the surface of the fixed element 3 and slides on the latter during its pivoting.
  • guide members 17 such as stones on the drum 5 or on the fixed element 3, or to arrange a ball bearing in the underside of the drum 5 in order to reduce friction.
  • the axial displacement of the drum 5 is limited by the toothed wheel 11.
  • the latter is supported on a fixed shaft 13 in a manner similar to the variant of the figures 1 to 3 , and said toothed wheel 11 has a sufficiently large outer diameter to cover or overlap, at least partially, an area of drum 5.
  • This at least partial overlap makes it possible to define a second axial stop for drum 5 in the direction opposite to the axial stop previously defined by the hollow of the fixed element 3. In other words, the drum 5 is held sandwiched between the fixed element 3 and the toothed wheel 11.
  • this variant offers a reduced number of parts and makes it possible to dispense with the presence of a barrel bridge.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Electromechanical Clocks (AREA)

Description

Domaine techniqueTechnical area

La présente invention se rapporte au domaine de l'horlogerie. Elle concerne, plus particulièrement, un organe moteur à encombrement réduit.The present invention relates to the field of watchmaking. It relates, more particularly, to a motor member of reduced size.

Etat de la techniqueState of the art

Actuellement, l'organe moteur le plus communément utilisé dans des pièces d'horlogerie mécaniques est le barillet. Typiquement, un barillet comporte un tambour creux comprenant une paroi cylindrique fermée d'un côté par un fond venu d'une pièce avec elle, et de l'autre côté par un couvercle, afin de former un logement pour un ressort spiral. L'extrémité extérieure du ressort spiral est liée par une bride fixe ou glissante à la paroi cylindrique du tambour, et l'extrémité intérieure du ressort est liée à une bonde associée à un arbre de barillet. La paroi extérieure du tambour est typiquement pourvue d'une denture afin d'entraîner un rouage de finissage, et l'arbre est solidaire d'une roue à rochet, qui sert pour le remontage du ressort. Il est également connu d'entraîner le rouage de finissage par l'intermédiaire de l'arbre et de remonter le ressort via le tambour. Par ailleurs, des tambours lisses, dépourvus de denture, sont connus, qui entraînent le rouage de finissage par l'intermédiaire d'une chaîne et d'un système de fusée.Currently, the driving member most commonly used in mechanical timepieces is the barrel. Typically, a barrel comprises a hollow drum comprising a cylindrical wall closed on one side by a bottom made integral with it, and on the other side by a cover, in order to form a housing for a spiral spring. The outer end of the spiral spring is linked by a fixed or sliding flange to the cylindrical wall of the drum, and the inner end of the spring is linked to a bung associated with a barrel arbor. The outer wall of the drum is typically provided with a toothing in order to drive a going train, and the shaft is integral with a ratchet wheel, which is used for winding the spring. It is also known to drive the going train via the shaft and wind the spring via the drum. Furthermore, smooth drums, devoid of teeth, are known, which drive the going train via a chain and a spindle system.

Le barillet classique mentionné ci-dessus est monté sur le bâti par son centre, notamment directement ou indirectement par l'intermédiaire de l'arbre. Cet agencement est relativement encombrant, et nécessite une certaine hauteur entre les éléments de bâti situés de part et d'autre du barillet afin d'assurer que le barillet n'entre pas en contact avec des composants voisins.The conventional cylinder mentioned above is mounted on the frame by its center, in particular directly or indirectly via the shaft. This arrangement is relatively bulky, and requires a certain height between the frame elements located on either side of the barrel in order to ensure that the barrel does not come into contact with neighboring components.

Des solutions à ce problème ont déjà été proposées dans l'art antérieur. À titre d'exemple, le brevet CH26510 omet le couvercle du tambour, le logement pour le ressort étant délimité sur un côté par le fond du tambour, et sur l'autre côté par un élément de bâti du mouvement, notamment la platine.Solutions to this problem have already been proposed in the prior art. For example, the patent CH26510 omits the cover of the drum, the housing for the spring being delimited on one side by the bottom of the drum, and on the other side by a frame element of the movement, in particular the plate.

Une solution encore plus compacte a été proposée dans le document CH 46863 . L'organe moteur de ce document propose un tambour également fermé d'un côté par un élément de bâti, dans lequel l'arbre est venu d'une pièce avec une roue qui est située totalement dans l'épaisseur de cet élément de bâti, dans un évidement prévu dans ce dernier.An even more compact solution has been proposed in the document CH 46863 . The motor member of this document proposes a drum also closed on one side by a frame element, in which the shaft is made in one piece with a wheel which is located completely within the thickness of this frame element, in a recess provided in the latter.

Les tambours de tous les modes de réalisation mentionnés ci-dessus sont supportés par leur centre, ce qui nécessite que le tambour comporte un fond solidaire de sa paroi latérale. Le document CH 334702 dévoile plusieurs variantes de barillets dans lesquels le tambour est constitué d'une bague guidée à sa paroi périphérique par l'intermédiaire de trois paires de galets reparties autour de la périphérie du tambour. Ce tambour ne comporte ni couvercle, ni fond, et le logement pour le ressort moteur est défini sur ses faces inférieure et supérieure par des ponts du bâti du mouvement.The drums of all the embodiments mentioned above are supported by their center, which requires that the drum has a bottom integral with its side wall. The document CH 334702 reveals several variants of barrels in which the drum consists of a ring guided at its peripheral wall by means of three pairs of rollers distributed around the periphery of the drum. This drum has neither cover or back, and the housing for the mainspring is defined on its lower and upper faces by bridges of the movement frame.

Bien que les barillets dévoilés dans ce dernier document entraînent une réduction de hauteur significative par rapport à un barillet conventionnel, l'utilisation de paires de galets situées autour du tambour augmente le diamètre du barillet, et augmente la complexité de l'organe moteur. Par ailleurs, les galets sont rotatifs, et nécessitent donc des axes de rotation. Il y a donc quatre axes (l'arbre et ceux des trois paires de galets) qui doivent être bien alignés lors du montage du pont de barillet sur la platine, ce qui entraîne une certaine difficulté pour son montage.Although the barrels disclosed in the latter document lead to a significant reduction in height compared to a conventional barrel, the use of pairs of rollers located around the drum increases the diameter of the barrel, and increases the complexity of the motor member. Furthermore, the rollers are rotatable, and therefore require axes of rotation. There are therefore four axes (the arbor and those of the three pairs of rollers) which must be well aligned when mounting the barrel bridge on the plate, which causes some difficulty in mounting it.

Finalement, le document FR 2229087 dévoile un organe moteur dans lequel le tambour est supporté radialement par une creusure ménagée dans le fond du boîtier, ce fond servant en tant qu'élément de bâti. Le tambour est ouvert sur ses deux côtés, et le logement ainsi défini pour loger le ressort est fermé d'une part par le fond et d'autre part par la roue dentée. Cet agencement est encore plus simple et plus compact que ceux mentionnés ci-dessus, mais la roue dentée est supportée sur les deux côtés. La compacité de l'organe moteur ainsi que sa simplicité peuvent donc encore être améliorées.Finally, the document FR 2229087 reveals a drive member in which the drum is supported radially by a recess formed in the bottom of the case, this bottom serving as a frame element. The drum is open on both sides, and the housing thus defined to house the spring is closed on the one hand by the bottom and on the other hand by the toothed wheel. This arrangement is even simpler and more compact than those mentioned above, but the gear wheel is supported on both sides. The compactness of the motor member as well as its simplicity can therefore be further improved.

D'autres organes moteurs sont également dévoilés par les documents CH46863 et EP2577404 .Other motor organs are also revealed by the documents CH46863 And EP2577404 .

Un but de l'invention est par conséquent de proposer un organe moteur dans laquelle les défauts susmentionnés sont au moins partiellement surmontés.An object of the invention is therefore to provide a motor member in which the aforementioned defects are at least partially overcome.

Divulguation de l'inventionDisclosure of Invention

De façon plus précise, l'invention concerne un organe moteur pour pièce d'horlogerie qui comprend un ressort moteur tel qu'un ressort spiral, et un tambour délimitant une paroi extérieure d'un logement logeant ledit ressort moteur. L'extrémité extérieure du ressort moteur est liée au tambour, qui est agencé pour pivoter autour d'un axe de rotation. Par ailleurs, le tambour présente la forme d'une couronne annulaire dentée.More specifically, the invention relates to a motor member for a timepiece which comprises a mainspring such as a spiral spring, and a drum delimiting an outer wall of a housing housing said mainspring. The outer end of the mainspring is linked to the drum, which is arranged to pivot around an axis of rotation. Furthermore, the drum has the shape of a toothed annular crown.

L'organe moteur comprend en outre une roue dentée, qui peut par exemple servir de roue à rochet, solidaire d'une bonde à laquelle une extrémité intérieure dudit ressort moteur est liée.The drive member further comprises a toothed wheel, which can for example serve as a ratchet wheel, secured to a bung to which an inner end of said mainspring is connected.

Une face dudit logement est destinée à être définie par un élément fixe de ladite pièce d'horlogerie contre lequel ledit tambour est destiné à être monté, tel qu'un élément de bâti, un fond, ou une glace.One face of said housing is intended to be defined by a fixed element of said timepiece against which said drum is intended to be mounted, such as a frame element, a back cover, or a crystal.

Selon l'invention ladite bonde et ladite roue dentée sont venues d'une pièce. Cette construction entraîne une diminution d'encombrement significative par rapport aux barillets de l'art antérieur. La combinaison d'une roue dentée venu d'une pièce avec la bonde (et donc compacte) avec un tambour formé d'une couronne annulaire dentée et donc dépourvu non seulement de couvercle mais aussi de fond, permet une construction très mince La bonde séparée est ainsi rendue superflue, ce qui diminue le nombre de pièces. Par ailleurs, le fait que la roue dentée et la bonde sont fabriquées de façon monobloc permet de rapprocher la roue au tambour, sans devoir laisser de la place pour compenser les tolérances nécessaires lorsqu'on utilise deux pièces distinctes solidaires l'une de l'autre.According to the invention, said plug and said toothed wheel are made in one piece. This construction leads to a significant reduction in size compared to barrels of the prior art. The combination of a toothed wheel made in one piece with the drain (and therefore compact) with a drum formed of an annular toothed ring and therefore devoid not only of cover but also of bottom, allows a very slim construction The separate drain is thus rendered superfluous, which reduces the number of parts. Furthermore, the fact that the toothed wheel and the plug are manufactured in such a way monobloc makes it possible to bring the wheel closer to the drum, without having to leave room to compensate for the tolerances necessary when using two separate parts integral with each other.

Pour le surplus, ledit tambour et ledit ressort moteur sont également venus d'une pièce, ce qui réduit le nombre de pièces de l'organe moteur et facilite son montage.Furthermore, said drum and said mainspring also come in one piece, which reduces the number of parts of the motor member and facilitates its assembly.

Avantageusement, l'autre face dudit logement, c'est-à-dire celle opposée à l'élément fixe, est définie par ladite roue dentée, ce qui minimise le nombre de composants et d'éléments de support nécessaires pour la construction de l'organe moteur, et augmente donc sa simplicité et sa compacité.Advantageously, the other face of said housing, that is to say the one opposite the fixed element, is defined by said toothed wheel, which minimizes the number of components and support elements necessary for the construction of the driving member, and therefore increases its simplicity and compactness.

Avantageusement, ledit tambour est positionné et guidé radialement et axialement par l'intermédiaire d'un pont de barillet. À ce titre, le pont de barillet peut comprendre au moins un organe de guidage s'étendant en saillie dudit pont de barillet selon une direction sensiblement parallèle audit axe de rotation, et donc perpendiculaire au plan de l'organe moteur. Au moins un organe de guidage est de préférence fixe, mais peut également être mobile. Un système de guidage compact est ainsi proposé, qui est facile à monter car les éléments de guidage sont portés par le pont de barillet et ne nécessitent donc aucun support supplémentaire. Afin de coopérer avec l'organe de guidage, le tambour peut comporter un épaulement agencé pour buter contre ce dernier afin de le positionner radialement et axialement par rapport au pont.Advantageously, said drum is positioned and guided radially and axially via a barrel bridge. As such, the barrel bridge may comprise at least one guide member projecting from said barrel bridge in a direction substantially parallel to said axis of rotation, and therefore perpendicular to the plane of the motor member. At least one guide member is preferably fixed, but can also be mobile. A compact guide system is thus proposed, which is easy to mount because the guide elements are carried by the barrel bridge and therefore do not require any additional support. In order to cooperate with the guide member, the drum may comprise a shoulder arranged to abut against the latter in order to position it radially and axially with respect to the bridge.

Afin de rendre l'organe moteur encore plus compact, particulièrement en ce qui concerne son diamètre, ledit au moins un organe de guidage peut s'inscrire entièrement à l'intérieur d'un lieu géométrique constitué d'un cylindre de hauteur infinie dont le diamètre est défini par les sommets de la denture dudit tambour. En d'autres termes, l'organe de guidage ne s'étend pas radialement au-delà des sommets des dents du tambour.In order to make the motor member even more compact, particularly as regards its diameter, said at least one guide member can fit entirely inside a locus consisting of a cylinder of infinite height whose diameter is defined by the peaks of the teeth of said drum. In other words, the guide member does not extend radially beyond the tops of the teeth of the drum.

Avantageusement, ledit au moins un organe de guidage peut comprendre une pluralité de plots, de préférence en pierre. L'utilisation de plots, qui sont des éléments simples fixes qui ne tournent pas, ne nécessite aucun axe de rotation pour le ou les organes de guidage, ce qui rend l'ensemble simple et facile à mettre en oeuvre. Alternativement, des rouleaux à billes ou similaires peuvent être utilisés, au prix d'une augmentation de la complexité et du nombre de composants.Advantageously, said at least one guide member may comprise a plurality of studs, preferably made of stone. The use of studs, which are simple fixed elements which do not rotate, does not require any axis of rotation for the guide member(s), which makes the assembly simple and easy to implement. Alternatively, ball rollers or the like can be used, at the cost of increased complexity and component count.

Avantageusement, ledit tambour peut comporter une pluralité de pierres ou plots de guidage destinées à buter contre ledit élément fixe. Un système de butée du tambour de faible frottement est ainsi proposé.Advantageously, said drum may comprise a plurality of stones or guide studs intended to abut against said fixed element. A low friction drum stop system is thus proposed.

Avantageusement, dans une autre variante, ledit tambour est soutenu par un roulement à billes. Les frottements subis par le tambour lors de ses rotations peuvent donc être minimisés, tout en maintenant l'épaisseur de l'organe moteur à un minimum. Le roulement à billes peut être bidirectionnel, ou unidirectionnel. Cette dernière possibilité permet au tambour de fonctionner en tant que rochet, sans nécessiter aucun cliquet, pour le cas où l'organe moteur est remonté par le tambour.Advantageously, in another variant, said drum is supported by a ball bearing. The friction undergone by the drum during its rotations can therefore be minimized, while keeping the thickness of the drive member to a minimum. The ball bearing can be bidirectional or unidirectional. This last possibility allows the drum to operate as a ratchet, without requiring any pawl, for the case where the driving member is wound up by the drum.

Avantageusement, ledit roulement à billes comprend une première rainure se situant sur la paroi extérieure dudit tambour et une deuxième rainure en regard de ladite première rainure, ladite deuxième rainure se situant sur la paroi intérieure d'une bague extérieure agencé pour être fixé audit élément fixe, les rainures définissant ainsi une cavité annulaire. Une pluralité de billes sont logés dans cette cavité annulaire. Une construction compacte est ainsi proposée.Advantageously, said ball bearing comprises a first groove located on the outer wall of said drum and a second groove facing said first groove, said second groove being located on the inner wall of an outer ring arranged to be fixed to said fixed element. , the grooves thus defining an annular cavity. A plurality of balls are housed in this annular cavity. A compact construction is thus proposed.

Avantageusement, l'organe moteur comme défini ci-dessus est intégré à un mouvement d'horlogerie que comporte ledit élément fixe.Advantageously, the motor member as defined above is integrated into a clock movement that comprises said fixed element.

Avantageusement, ladite roue dentée peut être montée pivotant sur un arbre fixe s'étendant de l'élément fixe ou du pont de barillet.Advantageously, said toothed wheel can be pivotally mounted on a fixed shaft extending from the fixed element or from the barrel bridge.

Avantageusement, ledit élément fixe peut être un élément de bâti d'un mouvement horloger de ladite pièce d'horlogerie tel qu'une platine ou un pont, ou une glace que comporte une pièce d'horlogerie côté fond ou côté cadran, ou bien un fond que comporte ladite pièce d'horlogerie.Advantageously, said fixed element can be a frame element of a timepiece movement of said timepiece such as a plate or a bridge, or a crystal that includes a timepiece on the back side or on the dial side, or else a bottom that includes said timepiece.

Dans le cas où l'élément fixe est une glace de la pièce d'horlogerie, ledit pont de barillet peut être intégré à un élément de bâti ou à un fond que comporte ladite pièce d'horlogerie.In the case where the fixed element is a crystal of the timepiece, said barrel bridge can be integrated into a frame element or into a back that includes said timepiece.

Brève description des dessinsBrief description of the drawings

D'autres détails de l'invention apparaîtront plus clairement à la lecture de la description qui suit, faite en référence aux dessins annexés dans lesquels :

  • La figure 1 est une vue en coupe d'une première variante d'un organe moteur selon l'invention ;
  • La figure 2 est une vue agrandie de la moitié gauche de la figure 1 ;
  • La figure 3 est une vue en perspective de l'organe moteur de la figure 1 ;
  • La figure 4 représente le pont de barillet en perspective, vu des deux côtés ;
  • La figure 5 représente le tambour en perspective, vu des deux côtés ;
  • La figure 6 représente une partie de l'élément de bâti sur lequel l'organe moteur de la figure 1 est monté ;
  • La figure 7 représente la roue dentée de la première variante en perspective, vu des deux côtés ;
  • La figure 8 est une vue en coupe d'une deuxième variante d'un organe moteur selon l'invention ;
  • La figure 9 est une vue agrandie de la moitié gauche de la figure 7 ;
  • La figure 10 est une vue éclatée de ladite deuxième variante d'un organe moteur ;
  • La figure 11 est une vue perspective d'une variante du tambour et du ressort moteur ;
  • La figure 12 est une vue perspective coupée d'encore une variante d'un organe moteur selon l'invention ;
  • La figure 13 est une vue élargie d'un détail de la figure 12 ;
  • La figure 14 est une vue en plan de la variante de la figure 12 ;
  • La figure 15 est une vue en perspective d'encore une variante d'un organe moteur selon l'invention ; et
  • La figure 16 est une vue en coupe de la variante de la figure 15.
Other details of the invention will appear more clearly on reading the following description, made with reference to the appended drawings in which:
  • There figure 1 is a sectional view of a first variant of a drive member according to the invention;
  • There figure 2 is an enlarged view of the left half of the figure 1 ;
  • There picture 3 is a perspective view of the engine of the figure 1 ;
  • There figure 4 shows the barrel bridge in perspective, seen from both sides;
  • There figure 5 represents the drum in perspective, seen from both sides;
  • There figure 6 represents a part of the frame element on which the engine member of the figure 1 has climbed ;
  • There figure 7 shows the toothed wheel of the first variant in perspective, seen from both sides;
  • There figure 8 is a sectional view of a second variant of a drive member according to the invention;
  • There figure 9 is an enlarged view of the left half of the figure 7 ;
  • There figure 10 is an exploded view of said second variant of a motor member;
  • There figure 11 is a perspective view of a variant drum and mainspring;
  • There figure 12 is a cutaway perspective view of yet another variant of a drive member according to the invention;
  • There figure 13 is an enlarged view of a detail of the figure 12 ;
  • There figure 14 is a plan view of the variant of the figure 12 ;
  • There figure 15 is a perspective view of yet another variant of a drive member according to the invention; And
  • There figure 16 is a cross-sectional view of the variant of the figure 15 .

Modes de réalisation de l'inventionEmbodiments of the Invention

Les figures 1 à 7 représentent une première variante d'un organe moteur 1 selon l'invention. L'organe moteur 1 est monté sur un élément fixe 3 d'une pièce d'horlogerie dans laquelle l'organe moteur est mis en oeuvre. Cet élément fixe 3 peut être une platine ou un pont, ou bien un fond sur lequel l'organe moteur 1 est directement ou indirectement monté.THE figures 1 to 7 represent a first variant of a motor member 1 according to the invention. Motor member 1 is mounted on a fixed element 3 of a timepiece in which the motor member is implemented. This fixed element 3 can be a plate or a bridge, or else a bottom on which the motor member 1 is directly or indirectly mounted.

L'organe moteur comporte un tambour 5 présentant une denture périphérique 6. Ce tambour 5 est dépourvu de couvercle et de fond, et définit un logement cylindrique dans lequel est disposé un ressort moteur 7. Ce dernier est de forme conventionnelle, en spiral, et est lié à son extrémité extérieure à la paroi intérieure du tambour 5, et à son extrémité intérieure à une bonde 9. Cette dernière est venue d'une pièce avec une roue dentée 11 qui sert de roue à rochet dans le mode de réalisation illustré, mais qui peut également servir pour l'entraînement des rouages, le tambour 5 servant de rochet dans un tel cas. La roue dentée 11 s'étend en superposition du ressort 7, et sert de couvercle de barillet, mais la bonde peut être constituée d'une pièce séparée solidarisée à la roue dentée 11. La bonde 9 est pivotée autour d'un arbre fixe 13, et est maintenue sur ce dernier au moyen d'une vis 15 ou similaire qui s'appuie contre l'arbre fixe 13. Comme mieux visible sur la figure 7 la bonde 9 comprend un crochet 9a pour la liaison avec l'extrémité intérieure du ressort moteur 7 formé directement dans la bonde 9, par exemple au moyen d'électroérosion à fil ou d'un enfonçage. Alternativement, il peut être réalisé par brochage ou fraisage traditionnel.The drive member comprises a drum 5 having peripheral toothing 6. This drum 5 has no cover and bottom, and defines a cylindrical housing in which is arranged a mainspring 7. The latter is of conventional shape, spiral, and is linked at its outer end to the inner wall of the drum 5, and at its inner end to a bung 9. The latter came in one piece with a toothed wheel 11 which serves as a ratchet wheel in the illustrated embodiment, but which can also be used to drive the gears, the drum 5 serving as a ratchet in such a case. The toothed wheel 11 extends superimposed on the spring 7, and serves as a barrel cover, but the bung can be made of a separate piece secured to the toothed wheel 11. The plug 9 is pivoted around a fixed shaft 13, and is held on the latter by means of a screw 15 or the like which bears against the fixed shaft 13 As best seen on the figure 7 the plug 9 comprises a hook 9a for connection with the inner end of the mainspring 7 formed directly in the plug 9, for example by means of wire spark erosion or sinking. Alternatively, it can be made by broaching or traditional milling.

La roue dentée 11 fait office de couvercle pour le barillet, qui n'est pas solidaire en rotation du tambour 5, comme connu par exemple dans le document CH 28684 .The toothed wheel 11 acts as a cover for the barrel, which is not integral in rotation with the drum 5, as known for example in the document CH 28684 .

Sur son côté opposé à la roue dentée 11, le barillet est fermé par une surface de l'élément fixe 3. Le tambour 5 en tant que tel est dépourvu de fond et de couvercle, et n'est qu'un anneau denté simple.On its side opposite to the toothed wheel 11, the barrel is closed by a surface of the fixed element 3. The drum 5 as such has no bottom and cover, and is only a simple toothed ring.

Le tambour 5 est positionné axialement et radialement par des éléments de guidage 17 répartis autour de la périphérie du tambour 5. Comme mieux visible sur les figures 3 et 4, ces éléments de guidage 17 sont, dans la variante représentée, des plots, réalisés ici sous forme de pierres, chassés dans un pont de barillet 19, et qui butent contre un épaulement 21 prévu sur le tambour 5. Un avantage de l'utilisation de pierres, telles que des rubis, pour les plots est le faible coefficient de frottements de ce matériau, mais d'autres matériaux sont possibles. Par exemple, les plots 17 peuvent être en métal dur, polymère ou céramique, et, dans le cas de métal, peuvent être venus de matière avec le pont de barillet 19. Alternativement, les plots peuvent être remplacés par une surface continue ou discontinue du pont de barillet 19, ou par des roulements à billes. Les plots 17 s'étendent du pont de barillet 19 selon une direction parallèle à l'axe de rotation du tambour 5, et ne s'étendent pas radialement au-delà de la denture périphérique 6 du tambour 5. En effet, les éléments de guidage 17 sont inscrits dans le diamètre du tambour 5, ce qui réduit l'encombrement dans le plan du tambour 5 par rapport au document CH 334702 susmentionné.The drum 5 is positioned axially and radially by guide elements 17 distributed around the periphery of the drum 5. As best seen on the figure 3 And 4 , these guide elements 17 are, in the variant shown, studs, made here in the form of stones, driven into a barrel bridge 19, and which abut against a shoulder 21 provided on the drum 5. An advantage of using of stones, such as rubies, for studs is the low coefficient of friction of this material, but other materials are possible. For example, the studs 17 can be made of hard metal, polymer or ceramic, and, in the case of metal, can be integral with the barrel bridge 19. Alternatively, the studs can be replaced by a continuous or discontinuous surface of the barrel bridge 19, or by ball bearings. The studs 17 extend from the barrel bridge 19 in a direction parallel to the axis of rotation of the drum 5, and do not extend radially beyond the peripheral toothing 6 of the drum 5. Indeed, the elements of guide 17 are inscribed in the diameter of the drum 5, which reduces the size in the plane of the drum 5 with respect to the document CH 334702 aforementioned.

En principe, le tambour 5 peut simplement buter contre la surface de l'élément fixe 3 et glisser sur ce dernier lors de ses pivotements. Cependant, afin de réduire les frottements, le tambour 5 comporte des pierres de guidage 23 chassées dans des logements correspondants et s'étendant en direction de la partie fixe 3. Ces pierres de guidage réduisent la surface de contact entre le tambour 5 et la partie fixe 3 ainsi que le coefficient de frottements.In principle, the drum 5 can simply abut against the surface of the fixed element 3 and slide on the latter during its pivoting. However, in order to reduce friction, the drum 5 comprises guide stones 23 driven into corresponding housings and extending in the direction of the fixed part 3. These guide stones reduce the contact surface between the drum 5 and the part fixed 3 as well as the coefficient of friction.

Le pont de barillet 19 comporte également un cliquet d'armage 25 qui coopère de manière connue avec la denture de la roue dentée 11. Par ailleurs, la face inférieure du pont de barillet 19 comporte un évidement 27 qui sert pour permettre à un mobile du rouage de finissage (non illustré) d'engrener avec la denture périphérique 6 du tambour 5.The barrel bridge 19 also comprises a winding pawl 25 which cooperates in a known manner with the toothing of the toothed wheel 11. Furthermore, the underside of the barrel bridge 19 comprises a recess 27 which serves to allow a mobile of the going train (not shown) to mesh with peripheral toothing 6 of drum 5.

Le pont de barillet 19 est fixé sur l'élément fixe 3 par l'intermédiaire de vis 29 engagées dans des tubes taraudés 31, qui s'étendent en saillie de la face supérieure de l'élément fixe 3. Ces tubes 31 servent en tant que plots de centrage pour le pont de barillet 19, et assurent son positionnement sur l'élément fixe 3. Alternativement, le pont peut être fixé à l'élément fixe 3 par l'intermédiaire d'autres méthodes de fixation telles que du clipsage, du bouterollage ou du collage.Barrel bridge 19 is fixed to fixed element 3 by means of screws 29 engaged in threaded tubes 31, which project from the upper face of fixed element 3. These tubes 31 serve as than studs of centering for the barrel bridge 19, and ensure its positioning on the fixed element 3. Alternatively, the bridge can be fixed to the fixed element 3 by means of other fixing methods such as clipping, riveting or gluing.

Les figures 8 à 10 illustrent une deuxième variante d'un organe moteur 1 selon l'invention. Cette variante diffère de celle des figures 1 à 7 principalement en ce que sa construction est l'inverse de celle de cette dernière.THE figures 8 to 10 illustrate a second variant of a motor member 1 according to the invention. This variant differs from that of figures 1 to 7 chiefly in that its construction is the reverse of that of the latter.

Dans cette variante, l'élément fixe 3 est une glace, qui peut être située soit côté cadran, soit côté fond, et délimite le logement du ressort moteur 7 sur l'un de ses côtés. Le pont de barillet 19 peut être un élément séparé, solidarisé à la platine ou au fond, ou peut être venu d'une pièce avec l'un de ces derniers. Le terme « pont » utilisé signifie plutôt une partie fonctionnelle de la structure de l'organe moteur 1 qui peut faire partie d'un autre élément tel qu'une platine ou un fondIn this variant, the fixed element 3 is a crystal, which can be located either on the dial side or on the back side, and delimits the housing of the mainspring 7 on one of its sides. The barrel bridge 19 can be a separate element, secured to the plate or to the back, or can come in one piece with one of these. The term "bridge" used rather means a functional part of the structure of the engine member 1 which can be part of another element such as a plate or a bottom

Le pont de barillet 19 de cette variante comprend un creux 20 dans son fond, dans lequel se situe la roue dentée 11, qui est pivotée autour d'un arbre fixe 13 que comporte ledit pont 19. Le positionnement axial de la roue dentée 11 est assuré d'un côté par une butée 33, et de l'autre côté par la glace 3.The barrel bridge 19 of this variant comprises a hollow 20 in its bottom, in which the toothed wheel 11 is located, which is pivoted around a fixed shaft 13 that comprises said bridge 19. The axial positioning of the toothed wheel 11 is secured on one side by a stop 33, and on the other side by the glass 3.

Le tambour 5 se superpose à la roue dentée 11, et est guidé en rotation et axialement par des éléments de guidage 17 semblables à ceux de la première variante, et qui s'étendent également depuis le pont de barillet 19 en direction de l'élément fixe 3 selon une direction parallèle à l'axe de rotation du tambour 5. Comme pour l'autre variante, les éléments de guidage 17 coopèrent avec l'épaulement 21 situé sur le tambour 5 afin d'assurer le positionnement de ce dernier.The drum 5 is superimposed on the toothed wheel 11, and is guided in rotation and axially by guide elements 17 similar to those of the first variant, and which also extend from the barrel bridge 19 in the direction of the fixed element 3 in a direction parallel to the axis of rotation of the drum 5. As for the other variant, the guide elements 17 cooperate with the shoulder 21 located on the drum 5 in order to ensure the positioning of the latter.

Les éléments de guidage 17 se situent dans des trous borgnes 35 qui sont plus profonds que nécessaire pour recevoir les éléments de guidage 17 afin de permettre l'horloger d'ajuster la hauteur de ces derniers selon ses besoins. Alternativement, les trous borgnes 35 peuvent présenter une profondeur suffisante pour recevoir les éléments de guidage 17 jusqu'au fond des trous 35.The guide elements 17 are located in blind holes 35 which are deeper than necessary to receive the guide elements 17 in order to allow the watchmaker to adjust the height of the latter according to his needs. Alternatively, the blind holes 35 may have a sufficient depth to receive the guide elements 17 to the bottom of the holes 35.

Sur l'autre face du tambour 5, le guidage de ce dernier est simplement assuré par l'élément fixe 3 contre lequel le tambour 5 bute. Néanmoins, on peut envisager de prévoir des pierres de guidage 23 dans le tambour qui s'étendent en direction de la glace 3 de manière analogue à la variante des figures 1 à 7.On the other face of the drum 5, the latter is simply guided by the fixed element 3 against which the drum 5 abuts. Nevertheless, it is possible to envisage providing guide stones 23 in the drum which extend in the direction of the crystal 3 in a manner analogous to the variant of the figures 1 to 7 .

Le montage de cette variante s'effectue dans l'ordre suivant :

  • montage de la roue dentée 11 sur l'axe fixe 13 ;
  • montage du tambour 5 en superposition de la roue dentée 11 ;
  • montage du ressort moteur 7 dans le tambour 5 et accroche de celui-ci sur la bonde 9 de la roue dentée 11 ;
  • montage de la glace.
This variant is assembled in the following order:
  • assembly of the toothed wheel 11 on the fixed axis 13;
  • assembly of the drum 5 superimposed on the toothed wheel 11;
  • assembly of the mainspring 7 in the drum 5 and hooks the latter on the bung 9 of the toothed wheel 11;
  • assembly of the ice.

Dans une variante non représentée, le positionnement axial de la roue dentée 11 peut être assuré non par le verre 3, mais par le tambour 5 qui peut servir de butée axiale.In a variant not shown, the axial positioning of the toothed wheel 11 can be ensured not by the glass 3, but by the drum 5 which can serve as an axial stop.

La figure 11 illustre une variante du tambour 5 et du ressort moteur 7 qui peut être mise en oeuvre en relation avec tous les modes de réalisation susmentionnés. Le tambour 5 ainsi que le ressort moteur 7 forment un ensemble monobloc, venu d'une pièce. L'extrémité interne du ressort moteur 7 comprend également une virole 7a permettant une liaison cinématique avec la roue dentée 11, mais cette virole 7a peut bien évidemment être omise. Dans l'exemple illustré, la virole comprend une ouverture polygonale, mais d'autres formes connues sont également possibles. Un ressort moteur 7 de ce type peut être fabriqué en métal, ou en matière à base de silicium (par exemple du silicium amorphe, monocristallin ou polycristallin, son oxyde, carbure ou nitrure mono- ou polycristallin), de l'alumine, du polymère, une composite ou similaire.There figure 11 illustrates a variant of the drum 5 and of the mainspring 7 which can be implemented in connection with all the aforementioned embodiments. The drum 5 as well as the mainspring 7 form a one-piece assembly, made in one piece. The inner end of the mainspring 7 also includes a ferrule 7a allowing a kinematic connection with the toothed wheel 11, but this ferrule 7a can of course be omitted. In the example illustrated, the ferrule comprises a polygonal opening, but other known shapes are also possible. A mainspring 7 of this type can be made of metal, or of silicon-based material (for example amorphous, monocrystalline or polycrystalline silicon, its mono- or polycrystalline oxide, carbide or nitride), alumina, polymer , a composite or the like.

Puisque la construction de l'organe moteur 1 de l'invention comprend de nombreuses surfaces de contact entre des pièces mobiles, il pourrait être avantageux d'apporter un polissage ou diamantage fin des surfaces de contact, ou d'effectuer un traitement de surface tel qu'un dépôt de DLC (carbone sous forme de diamant), une nanostructuration, un teflonnage, une galvanoplastie ou une implantation ionique sur l'une ou plusieurs surfaces destinée(s) à subir des frottements.Since the construction of the motor member 1 of the invention comprises many contact surfaces between moving parts, it could be advantageous to provide a polishing or fine diamond grinding of the contact surfaces, or to carry out a surface treatment such as as a deposit of DLC (carbon in the form of diamond), nanostructuring, teflon coating, electroplating or ion implantation on one or more surfaces intended to be subjected to friction.

Les figures 12 à 14 illustrent encore une variante d'un organe moteur 1 selon l'invention. Dans cette variante, la roue dentée 11 est supportée sur un arbre fixe 13 de manière similaire à la variante des figures 1 à 3, et le logement pour le ressort moteur est défini de ses deux faces par la roue dentée 11 ainsi qu'un élément fixe 3 de la pièce d'horlogerie, tel qu'un élément de bâti.THE figures 12 to 14 further illustrate a variant of a motor member 1 according to the invention. In this variant, the toothed wheel 11 is supported on a fixed shaft 13 in a manner similar to the variant of the figures 1 to 3 , and the housing for the mainspring is defined on both sides by the toothed wheel 11 as well as a fixed element 3 of the timepiece, such as a frame element.

Cependant, le tambour 5 est maintenu dans ses positions axiales et radiales par l'intermédiaire d'un roulement à billes 37. Ce roulement à billes 37 est constitué d'une première rainure 38a prévue sur la paroi extérieure du tambour 5, et d'une deuxième rainure 38b formé dans la face intérieure d'une bague extérieure 39. Les deux rainures 38a, 38b sont l'une en regard de l'autre afin de définir une cavité, et des billes (non illustrés) prennent place dans cette cavité de manière généralement connue.However, the drum 5 is maintained in its axial and radial positions by means of a ball bearing 37. This ball bearing 37 consists of a first groove 38a provided on the outer wall of the drum 5, and of a second groove 38b formed in the inner face of an outer ring 39. The two grooves 38a, 38b face each other in order to define a cavity, and balls (not shown) take place in this cavity in a generally known way.

Dans la variante illustrée, la première rainure 38a est formée d'une première surface biseautée 5a prévu sur la face extérieure du tambour 5, qui est adjacente à une second surface biseautée 41a dont est munie une bague intérieure 41. Cette dernière est chassée, collée, soudée ou solidarisée autrement à la face extérieure du tambour 5, mais il est également possible de former la première rainure 38a directement dans le corps du tambour 5, qui serait par conséquent monobloc.In the variant illustrated, the first groove 38a is formed by a first bevelled surface 5a provided on the outer face of the drum 5, which is adjacent to a second bevelled surface 41a with which an inner ring 41 is provided. , welded or otherwise secured to the outer face of the drum 5, but it is also possible to form the first groove 38a directly in the body of the drum 5, which would therefore be in one piece.

La bague extérieure 39 est maintenue en place par un pont 19 ainsi que des vis 43, qui la maintiennent contre un épaulement 45 prévu sur l'élément fixe 3 auquel elle est ainsi fixée.The outer ring 39 is held in place by a bridge 19 as well as screws 43, which hold it against a shoulder 45 provided on the fixed element 3 to which it is thus fixed.

Le tambour 5 est ainsi suspendu par le roulement à billes 37, et n'entre pas en contact ni avec l'élément fixe 3, ni avec la roue dentée 11. Par conséquent, et contrairement aux autres variantes décrites ci-dessus, aucun organe de guidage supplémentaire n'est nécessaire. Les frottements subis par le tambour lors de ses pivotements peuvent ainsi être réduits à une valeur minimum. Par ailleurs, cette variant présente une épaisseur exceptionnellement fine.The drum 5 is thus suspended by the ball bearing 37, and does not come into contact either with the fixed element 3, or with the toothed wheel 11. Consequently, and contrary to the other variants described above, no member additional guidance is required. The friction undergone by the drum during its pivoting can thus be reduced to a minimum value. Moreover, this variant has an exceptionally thin thickness.

Les figures 12 à 14 illustrent également l'agencement des engrenages avec la roue dentée 11 et avec le tambour 5. On voit clairement un renvoi 47 qui se trouve dans le même plan que la roue dentée 11 qui engrène avec cette dernière, ainsi qu'un autre renvoi 49 qui se trouve dans le même plan que la denture 6 du tambour 5 et engrène également y avec. Les renvois 47, 49 passent par conséquent de part et d'autre de la bague extérieure 39.THE figures 12 to 14 also illustrate the arrangement of the gears with the toothed wheel 11 and with the drum 5. One clearly sees a reference 47 which is in the same plane as the toothed wheel 11 which meshes with the latter, as well as another reference 49 which is in the same plane as the teeth 6 of the drum 5 and also meshes with it. The references 47, 49 therefore pass on either side of the outer ring 39.

Cet agencement présente encore d'autres possibilités pour d'autres variantes de construction. En premier lieu, les mêmes considérations par rapport à la configuration du ressort moteur 7 exposées ci-dessus (ressort monobloc avec le tambour 5, ressort conventionnel, etc.) s'appliquent également ici. Il est également possible de remonter l'organe moteur par son tambour 5 et d'utiliser la roue dentée 11 en tant que prise de force pour le mouvement.This arrangement also presents other possibilities for other variants of construction. Firstly, the same considerations with respect to the configuration of the mainspring 7 set out above (one-piece spring with the drum 5, conventional spring, etc.) also apply here. It is also possible to reassemble the motor member by its drum 5 and to use the toothed wheel 11 as a power take-off for the movement.

Dans ce dernier cas, si le roulement à billes 37 est de type unidirectionnel, l'organe moteur peut être remonté par le tambour 5 sans nécessiter aucun cliquet, réduisant ainsi le nombre de composants utilisés dans la construction. Par ailleurs, cet agencement élimine la surtension lors de l'armage du ressort moteur 7 par l'angle mort d'un roulement unidirectionnel.In the latter case, if the ball bearing 37 is of the unidirectional type, the motor member can be wound up by the drum 5 without requiring any ratchet, thereby reducing the number of components used in construction. Furthermore, this arrangement eliminates the overtension during the winding of the mainspring 7 through the dead angle of a one-way bearing.

Les figures 15 à 16 illustrent une variante supplémentaire d'un organe moteur 1 selon l'invention. Cette variante diffère de celle des figures 1 à 7 principalement en ce que le tambour 5 est positionné radialement par des éléments de guidage portés ou venues de matière avec l'élément fixe 3, et axialement d'une part par l'élément fixe 3, d'autre part par la roue dentée 11.THE figures 15 to 16 illustrate an additional variant of a motor member 1 according to the invention. This variant differs from that of figures 1 to 7 mainly in that the drum 5 is positioned radially by guide elements carried or integral with the fixed element 3, and axially on the one hand by the fixed element 3, on the other hand by the toothed wheel 11.

Plus précisément, l'élément fixe 3 comporte une creusure 22 dans lequel le tambour 5 vient se placer. La paroi latérale 22a de cette creusure 22 forme un élément de guidage permettant de positionner radialement le tambour 5 et de limiter axialement la position du tambour 5 dans une première direction. D'autres formes d'éléments de guidage sont également possibles, comme par exemple des plots solidaires de l'élément fixe 3 qui prennent place dans une rainure circulaire prévue dans la face inférieure du tambour 5 ou inversement, ou un système d'une ou plusieurs rainures ou rails circulaires distribués entre l'élément fixe 3 et le tambour 5, qui interagissent dans le même but.More specifically, the fixed element 3 comprises a recess 22 in which the drum 5 is placed. The side wall 22a of this recess 22 forms a guide element making it possible to position the drum 5 radially and to limit the position of the drum 5 axially in a first direction. Other shapes of guide elements are also possible, such as for example studs integral with the fixed element 3 which take place in a circular groove provided in the underside of the drum 5 or vice versa, or a system of one or several circular grooves or rails distributed between the fixed element 3 and the drum 5, which interact for the same purpose.

Dans la variante illustrée, le tambour 5 bute simplement contre la surface de l'élément fixe 3 et glisse sur ce dernier lors de ses pivotements. Cependant, il est également possible de prévoir des organes de guidage 17 tels que des pierres sur le tambour 5 ou sur l'élément fixe 3, ou d'agencer un roulement à billes dans la face inférieure du tambour 5 afin de réduire les frottements.In the variant illustrated, the drum 5 simply abuts against the surface of the fixed element 3 and slides on the latter during its pivoting. However, it is also possible to provide guide members 17 such as stones on the drum 5 or on the fixed element 3, or to arrange a ball bearing in the underside of the drum 5 in order to reduce friction.

Dans la direction opposée à la butée axiale définie par la creusure 22 de l'élément fixe 3, le déplacement axial du tambour 5 est limitée par la roue dentée 11. Cette dernière est supportée sur un arbre fixe 13 de manière similaire à la variante des figures 1 à 3, et ladite roue dentée 11 présente un diamètre extérieur suffisamment important pour recouvrir ou chevaucher, au moins partiellement, une zone du tambour 5. Ce recouvrement, au moins partiel, permet de définir une deuxième butée axiale pour le tambour 5 dans la direction opposée à la butée axiale précédemment définie par le creux de l'élément fixe 3. En d'autres mots, le tambour 5 est tenu en sandwich entre l'élément fixe 3 et la roue dentée 11.In the direction opposite to the axial stop defined by the hollow 22 of the fixed element 3, the axial displacement of the drum 5 is limited by the toothed wheel 11. The latter is supported on a fixed shaft 13 in a manner similar to the variant of the figures 1 to 3 , and said toothed wheel 11 has a sufficiently large outer diameter to cover or overlap, at least partially, an area of drum 5. This at least partial overlap makes it possible to define a second axial stop for drum 5 in the direction opposite to the axial stop previously defined by the hollow of the fixed element 3. In other words, the drum 5 is held sandwiched between the fixed element 3 and the toothed wheel 11.

Avantageusement, cette variante propose un nombre de pièces réduit et permet de s'affranchir de la présence d'un pont de barillet.Advantageously, this variant offers a reduced number of parts and makes it possible to dispense with the presence of a barrel bridge.

Bien que l'invention ait été décrite en liaison avec des modes de réalisation particuliers, il est bien évident qu'elle n'y est nullement limitée et qu'elle comprend tous les équivalents techniques des moyens décrits ainsi que leurs combinaisons si celles-ci entrent dans le cadre de l'invention comme définie par les revendications.Although the invention has been described in connection with particular embodiments, it is obvious that it is in no way limited thereto and that it includes all the technical equivalents of the means described as well as their combinations if these fall within the scope of the invention as defined by the claims.

Claims (14)

  1. Drive organ (1) for a timepiece comprising:
    - a drive spring (7);
    - a drum (5) delimiting an outer wall of a housing accommodating said drive spring (7), an outer end of said drive spring (7) being linked to said drum (5), said drum (5) being arranged to pivot about an axis of rotation and having the form of a toothed annular crown;
    - a toothed wheel (11) secured to a boss (9) to which an inner end of said drive spring (7) is linked;
    wherein an open face of said housing is intended to be closed by being positioned opposite a fixed element (3) of the timepiece against which said drum (5) is intended to be mounted,
    characterized in that said boss (9) and said toothed wheel (11) are made of a single piece, and in that said drum (5) and said drive spring (7) are made of a single piece.
  2. Drive organ (1) according to Claim 1, wherein said drum (5) is positioned and guided radially and axially by a barrel bridge (19) comprised by said drive organ (1) .
  3. Drive organ (1) according to Claim 2, wherein said barrel bridge (19) comprises at least one guide organ (17) extending protrudingly from said barrel bridge (19) in a direction substantially parallel to said axis of rotation.
  4. Drive organ (1) according to Claim 3, wherein said drum comprises a shoulder (21) arranged to abut against said at least one guide organ (17).
  5. Drive organ (1) according to one of Claims 3 and 4, wherein said at least one said guide organ (17) is inscribed entirely inside a geometrical location composed of a cylinder of infinite height whose diameter is defined by tips of the teeth (6) of said drum (5).
  6. Drive organ (1) according to one of Claims 3 and 4, wherein said at least one guide organ (17) comprises a plurality of studs, preferably jewels.
  7. Drive organ (1) according to one of Claims 1 to 6, wherein said drum (5) comprises a plurality of guide jewels (23) intended to abut against said fixed element.
  8. Drive organ (1) according to Claim 1, wherein said drum (5) is supported by a ball bearing (37).
  9. Drive organ (1) according to Claim 8, wherein said ball bearing comprises a first groove (38a) situated on the outer wall of said drum and a second groove (38b) opposite said first groove (38a), said second groove (38b) being situated on the inner wall of an outer ring (39) arranged to be fixed to said fixed element (3), a plurality of balls being accommodated in the cavity formed by said grooves (38a, 38b).
  10. Timepiece movement comprising a drive organ (1) according to one of Claims 1 to 9.
  11. Timepiece movement according to Claim 10, wherein said toothed wheel (11) is mounted to pivot on a fixed shaft (13) extending from one of the fixed element (3) or the barrel bridge (19).
  12. Timepiece movement according to one of Claims 10 and 11, wherein said fixed element (3) is a frame element of said movement.
  13. Timepiece comprising a timepiece movement according to one of Claims 10 to 12.
  14. Timepiece according to Claim 13, wherein said fixed element is a glass (3) comprised by said timepiece or a caseback comprised by said timepiece.
EP21168538.3A 2016-06-01 2017-05-17 Motor member for a timepiece Active EP3889688B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH00698/16A CH712519B8 (en) 2016-06-01 2016-06-01 Engine member for a timepiece.
EP17171580.8A EP3252540B1 (en) 2016-06-01 2017-05-17 Motor member for a time piece

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP17171580.8A Division EP3252540B1 (en) 2016-06-01 2017-05-17 Motor member for a time piece
EP17171580.8A Division-Into EP3252540B1 (en) 2016-06-01 2017-05-17 Motor member for a time piece

Publications (2)

Publication Number Publication Date
EP3889688A1 EP3889688A1 (en) 2021-10-06
EP3889688B1 true EP3889688B1 (en) 2023-04-26

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EP17171580.8A Active EP3252540B1 (en) 2016-06-01 2017-05-17 Motor member for a time piece
EP21168544.1A Pending EP3889689A1 (en) 2016-06-01 2017-05-17 Motor member for a timepiece
EP21168538.3A Active EP3889688B1 (en) 2016-06-01 2017-05-17 Motor member for a timepiece

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EP17171580.8A Active EP3252540B1 (en) 2016-06-01 2017-05-17 Motor member for a time piece
EP21168544.1A Pending EP3889689A1 (en) 2016-06-01 2017-05-17 Motor member for a timepiece

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CH (1) CH712519B8 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD1015914S1 (en) * 2022-06-29 2024-02-27 Turlen Holding Sa Watch movement

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH705491A2 (en) * 2011-09-15 2013-03-15 Montres Breguet Sa Assembly barrel for use in clockwork of clock element or keyless watch, has drum guided in swiveling manner around fulcrum pin by swiveling guidance unit that is arranged peripherally to cooperate with turntable or bridge
EP2577404B1 (en) * 2010-05-27 2016-10-05 Association Suisse pour la Recherche Horlogère (ASRH) Barrel spring
EP2437125B1 (en) * 2010-10-01 2019-09-04 Rolex S.A. Timepiece

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH26510A (en) 1902-11-08 1903-09-15 Henri Sandoz Watch barrel
CH28684A (en) 1903-07-23 1904-06-15 Meyer Graber C Watch barrel
CH46863A (en) * 1908-09-26 1910-04-16 Maire Favre E Long-life running watch
CH334702A (en) * 1957-12-03 1958-12-15 Rolex Montres Timepiece
CH678473A4 (en) * 1973-05-10 1976-03-31
IT1074807B (en) * 1976-02-18 1985-04-20 Bouchet Lassale Sa WATERPROOFING DEVICE FOR CLOCK BARREL
EP3021172A1 (en) * 2014-11-11 2016-05-18 Montres Breguet SA Motor member for a clock movement

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2577404B1 (en) * 2010-05-27 2016-10-05 Association Suisse pour la Recherche Horlogère (ASRH) Barrel spring
EP2437125B1 (en) * 2010-10-01 2019-09-04 Rolex S.A. Timepiece
CH705491A2 (en) * 2011-09-15 2013-03-15 Montres Breguet Sa Assembly barrel for use in clockwork of clock element or keyless watch, has drum guided in swiveling manner around fulcrum pin by swiveling guidance unit that is arranged peripherally to cooperate with turntable or bridge

Also Published As

Publication number Publication date
CH712519A1 (en) 2017-12-15
EP3889688A1 (en) 2021-10-06
EP3252540B1 (en) 2021-06-23
EP3889689A1 (en) 2021-10-06
CH712519B8 (en) 2023-03-31
EP3252540A1 (en) 2017-12-06
CH712519B1 (en) 2023-01-31

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