EP3822708A1 - Timepiece mechanism comprising a device for rotating one element by another - Google Patents

Timepiece mechanism comprising a device for rotating one element by another Download PDF

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Publication number
EP3822708A1
EP3822708A1 EP20191752.3A EP20191752A EP3822708A1 EP 3822708 A1 EP3822708 A1 EP 3822708A1 EP 20191752 A EP20191752 A EP 20191752A EP 3822708 A1 EP3822708 A1 EP 3822708A1
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EP
European Patent Office
Prior art keywords
circle
male element
diameter
members
inscribed
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.)
Pending
Application number
EP20191752.3A
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German (de)
French (fr)
Inventor
Didier VUILLEMIN
Jean-Baptiste LE BRIS
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Patek Philippe SA Geneve
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Patek Philippe SA Geneve
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Publication date
Application filed by Patek Philippe SA Geneve filed Critical Patek Philippe SA Geneve
Publication of EP3822708A1 publication Critical patent/EP3822708A1/en
Pending legal-status Critical Current

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    • 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
    • G04B13/00—Gearwork
    • G04B13/02—Wheels; Pinions; Spindles; Pivots
    • 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
    • G04B13/00—Gearwork
    • G04B13/02—Wheels; Pinions; Spindles; Pivots
    • G04B13/021—Wheels; Pinions; Spindles; Pivots elastic fitting with a spindle, axis or shaft

Definitions

  • the present invention relates to a watch mechanism comprising at least two members and a device for driving in rotation one of said members by the other comprising a male element carried by one of said members and a female element carried by the other. said members and arranged to cooperate with said male element.
  • Such a drive device is for example used to transmit a torque from a ratchet to a barrel shaft, the male element being a square provided on the barrel shaft and the female element being a square hole of corresponding shape. , with the clearance necessary for assembly, hollowed out in the ratchet board and in which fits the square of the barrel shaft.
  • a square has sharp edges, so that the interface between the two members can be damaged, the contact being made between edges and surfaces.
  • the stresses linked to the contact between edges and surfaces are concentrated at the level of the interface. Consequently, when the torques at this interface are high, for example in the case of a barrel shaft and a ratchet stressed during a winding of a timepiece to supply said part with energy, the risk breaking the shaft at the level of the ratchet is very high when said shaft is twisted by the ratchet. This risk is increased when the diameter of the barrel shaft is reduced.
  • the contact pressure at the interface between the two members is high, so that it is not possible to use members made of a fragile material, such as silicon or ceramics.
  • the square is an assembly which requires a lot of play, which induces great imprecision, which is detrimental in certain applications. This is why a person skilled in the art avoids using a square to assemble two members between which a torque must be transmitted.
  • a square male element requires quarter turns to index the female element, which will cause additional wear when one of the members must be rotated relative to the other until the position assembly is found.
  • the present invention aims to remedy these drawbacks by proposing a device for driving in rotation a member of a watch mechanism by another member making it possible to improve the mechanical strength of the member subjected to torsion by the other member. , in order to increase the torque transmitted before breaking.
  • the present invention also aims to provide a device for driving in rotation a member of a watch mechanism by another member making it possible, in addition to increasing the torque transmitted before breaking, to reduce the contact pressure at the interface. in order to guarantee the integrity of the organs.
  • the present invention relates to a watch mechanism comprising at least two members and a device for driving in rotation one of said members by the other comprising a male element carried by one of said members and a female element carried. by the other of said members and arranged to cooperate with said male element.
  • the male element has, in cross section, a shape generally defining a first outer circle of outer diameter D and of center C and comprising at least one flat or a hollow, symmetrical with respect to an axis passing through the center C of the outer circle, and directed towards the center C so as to be tangent to a second inscribed inner circle of center C and of inscribed diameter d such that the difference between the outer diameter D and the inscribed diameter d is greater than or equal to 8% and strictly less than 20% of the outside diameter D.
  • the female element has, in cross section, the same shape as that of the male element arranged to receive and cooperate with said male element in order to transmit a torque from one to the other. of said organs.
  • the shape presented by the male and female elements according to the invention makes it possible to transmit more torque before breaking from one member to the other than a square.
  • the hollow is circular and has a radius defining a point equal to the sum of the radius of the inner inscribed circle and the radius of the circular hollow, said point being less than 300% of the radius of the inner inscribed circle.
  • This shape presented by the male and female elements according to the invention also makes it possible to minimize the contact pressure at the interface of the components, and thus to be able to use fragile materials for their construction.
  • the present invention also relates to a timepiece comprising a mechanism as defined above.
  • the present invention also relates to timepiece equipment comprising a mechanism as defined above.
  • the present invention relates to a watch mechanism comprising at least two members 1, 2 and a device for driving in rotation one of said members by the other comprising a male element carried by one of said members and a female element carried by the other of said members and arranged to cooperate with said male element, one of said members 1, 2 rotating the other member.
  • the member 1 is a shaft or a rod defining a longitudinal axis and carrying at its end the male element 1a and the member 2 has a hollowed out indentation constituting the female element 2a in which the element male 1a is introduced to ensure torque transmission.
  • the member 1 is for example a barrel shaft, the member 2 being a ratchet arranged to be mounted on the end of the barrel shaft, as shown in the figure. figure 1 , in order to transmit a torque to the barrel shaft, by means of the winding stem actuated by a user, allowing the winding of the timepiece.
  • the members 1 and 2 carrying the male and female elements can be formed by other pairs of watch members, such as a winding stem and its sliding pinion, or a winding stem and a cooperating key. with the winding stem for winding and / or setting the time a timepiece, or any other component of the watch mechanism and a tool provided to cooperate with said component.
  • the element the male can be carried by the driven member, the female element being provided on the driving member, or conversely the male element can be carried by the driving member, the female element then being provided on the driven member.
  • the male element 1a is cut and shaped at the end of the member 1 so that it has, in cross section, a shape generally defining an outer circle 4 of outer diameter D and of center C, its outer contour being partially coincident with said outer circle 4, and comprising, opening out at its outer periphery, at least one hollow 6 corresponding to a first embodiment according to figures 4 and 5 , or at least one dish 6 corresponding to a second embodiment according to figure 9 , symmetrical with respect to an axis 8 passing through the center C of the outer circle 4.
  • the hollow 6 may be of circular shape, of radius R, and of center C 'located outside the outer circle 4.
  • the hollow 6 may have another shape, for example a V-shaped polygonal shape with two sides or a U-shaped shape with three identical or different sides.
  • the hollow or the flat 6 is directed towards the center C so as to be tangent to an inner inscribed circle 10 of center C, concentric to the outer circle 4, and of inscribed diameter d such that the difference between the outer diameter D and the diameter inscribed d is greater than or equal to 8% and less than 20% of the outside diameter D.
  • said hollow 6 is concave and directed towards the center C, towards the inside of the male element 1a, so as to present an apex 6a defining said inner inscribed circle 10, said apex 6a of the hollow 6 being defined as the point of hollow 6 which is tangent to the inner inscribed circle 10.
  • the difference between the outside diameter D and the inscribed diameter d is between 10% and 19% of the outside diameter D, and more preferably between 12% and 19% of the outside diameter D, and more specifically between 13% and 15%. % of the outside diameter D in the case of a dish.
  • the outer diameter D preferably corresponds to the diameter of the shaft 1, which may be of the order of 1 mm for a barrel shaft.
  • the hollow 6 when the hollow 6 is circular in shape, its radius R defines a point P equal to the sum of the radius of the inner inscribed circle 10 and the radius R of the circular hollow 6.
  • said point P may be less than 300%, and preferably less than 200%, of the radius of the inner inscribed circle 10.
  • said point P is less than 150% of the radius of the inner inscribed circle 10.
  • the circular hollow 6 may have a radius R chosen so that the center C 'of said circular hollow 6 is situated between the inner inscribed circle 10 and the outer circle 4, as shown in FIG. figure 7 .
  • the cross-sectional shape of the male element 1a comprises at least two hollows or plates 6, identical, arranged around the inner inscribed circle 10 sufficiently close to one of the l 'other to form between them a convex radial protuberance 12, connecting them to each other by their opposite edges.
  • Said protuberance 12 therefore extending in the direction of the outside of the male element 1a along an axis 14 passing through the center C of the outer circle 4, said protuberance 12 being symmetrical with respect to said axis 14.
  • the protuberance 12 has an apex 12a coincides with an arc of a circle of the outer circle 4.
  • a protuberance 12 having an apex 12a coincident with with an arc of the outer circle 4 is particularly advantageous in terms of manufacturing and machining precision. The same applies to the corresponding protuberance 18 of the female element 2a.
  • the arc of a circle, defined by the angular sector ⁇ (cf. figure 5 ) corresponding to the width of the protuberances 12 is such that the angle ⁇ is between 5 ° and 340 °, preferably greater than or equal to 10 °, even more preferably greater than or equal to 15 °, preferably greater than or equal to 20 °, depending on the number of protrusions and hollows or flats.
  • the angle ⁇ is between 10 ° and 50 °, and between 20 ° and 40 ° for a configuration with four protrusions and four flats as shown on figure 9 .
  • the imprint made in the member 2 constituting the female element 2a has, in cross section, the same shape as that of the male element 1a defined above, arranged to receive and cooperate with said male element 1a in order to transmit a torque from one to the other of said members 1 and 2.
  • the female element 2a comprises alternately hollows 16 and protuberances 18 contiguous by their two sides to one of these hollows 16, the hollows 16 having the same shape as the hollows 6 described above and the hollows 6. protrusions 18 having the same shape as the protrusions 12 described above, so that the female element 2a follows the contours of the male element 1a over its entire cross section, said male element 1a fitting together or s 'fitting perfectly into the female element 2a. Only the dimensions of the female element 2a are adapted so as to provide the clearance just necessary for mounting the male element 1a in the female element 2a.
  • the shape and dimensions of the cross section of the female element 2a are advantageously chosen. so that the adjustment between the male 1a and female 2a elements is tighter at the level of the arcuate portions that include the protuberances 12, 18. In fact, the machining of these portions is very precise and a tight fit to this level therefore promotes good concentricity of the male 1a and female 2a elements. This results in improved constant torque transmission. This is particularly advantageous in the case where the member 1 is a barrel shaft and the member 2 a ratchet, and even more particularly when such members are used in a series assembly of barrels.
  • More play can typically be left between the male 1a and female 2a elements at the level of the other portions of the outline of said elements 1a, 2a, in particular at the level of the portions comprising flats such as flats 6, the machining of which is generally less. precise, as shown in figure 9 .
  • the male element 1a and the female element 2a comprise at least three hollows or flats 6, 16 alternating with at least three protuberances 12, 18 respectively, regularly distributed around their respective inner inscribed circle.
  • the male element 1a and the female element 2a comprise between four and eight hollows or dishes 6, 16 regularly distributed around their respective inner inscribed circle, and preferably at least five hollows 6, 16 and five protuberances 12, 18.
  • the male element 1a and the female element 2a comprise six recesses 6, 16 alternating with six protuberances 12, 18, regularly distributed around their respective inner inscribed circle, as shown. on the figures 1 to 7 .
  • the male element 1a and the female element 2a comprise four plates 6, 16 alternating with four protuberances 12, 18, regularly distributed around their respective inner inscribed circle, as shown in the figures. figures 8 and 9 .
  • the two embodiments of the invention can be combined so that the male element and its corresponding female element can respectively have in cross section a shape which comprises at least one hollow and at least one flat.
  • the hollows may be different from one another, while respecting the conditions of the inner inscribed circle.
  • the protuberances 12 form longitudinal ridges 20 connected to the surface of the body of the shaft 1 and the hollows or flats 6 are connected to the surface of the body of the shaft by shoulders 22, as shown. the figure 2 .
  • the shoulders 22 serve as stops to block the member 2 mounted on the member 1 in position.
  • the figures 5 to 7 show different variants of the first embodiment of the invention, obtained by varying the difference between the outside diameter D and the inscribed diameter d as well as the pointing, the male and female elements having six recesses 6 alternating with six protuberances 12, regularly distributed around the inner inscribed circle 10.
  • the angle ⁇ (cf. figure 5 ) between the tangent passing through the point of connection of a hollow 6 and the adjacent protuberance 12 and the axis of symmetry 14 of said adjacent protuberance 12 is greater than 22 ° and preferably greater than 25 °.
  • the difference between the outside diameter D and the inscribed diameter d is 18%, and in the variant of the figure 6 , the difference between the outside diameter D and the inscribed diameter d is 14%.
  • the pointing P is less than 200% of the radius of the inner inscribed circle 10.
  • the pointing P is less than 150% of the radius of the inner inscribed circle 10. More specifically, the pointing P of the variant of the figure 7 , for which the center C 'of the circular hollow 6 lying between the inner inscribed circle 10 and the outer circle 4, is of the order of 120% of the radius of the inner inscribed circle 10.
  • the torque transmitted before rupture of the barrel shaft for the male / female elements of the present invention is greater than that obtained with the comparative male / female elements of square shape.
  • the male / female elements of the present invention therefore make it possible to increase the strength of the member carrying the male element with respect to a square assembly traditionally used in watchmaking.
  • the contact pressure for the male / female members of the present invention is lower than that obtained with the comparative square shaped male / female members.
  • the male / female elements of the present invention therefore make it possible to reduce the contact pressure at the interface of the components 1 and 2 compared to a square assembly traditionally used in watchmaking. Wear at the interface of components 1 and 2 is therefore reduced.
  • the variant of the figure 6 which has a difference between the outside diameter D and the inscribed diameter d less than that of the figures 5 and 7 makes it possible to obtain a torque transmitted before breaking greater than that obtained with the variants of figures 5 and 7 .
  • the variant of the figure 7 makes it possible to obtain a contact pressure lower than that obtained with the variant of the figure 5 .
  • the indexing of the members 1 and 2 for example the indexing of the ratchet relative to the barrel shaft, will be easier than with a square assembly.
  • the identical shapes of the cross section of the male element and of the female element make it possible to improve the guidance between these elements, for example compared to a conventional coupling using a shaft and a ratchet having a square-shaped hole.
  • the square coupling causes a lot of play while with the present invention, the play is tightened, the flatness of the ratchet on the shaft for example being improved.
  • the mechanism of the invention can be used for two organs incorporated in a movement or when one of the organs is incorporated in the movement and the other organ being external to the movement, such as a winding rod and a key cooperating with the winding stem for winding and / or setting the time a timepiece, or any other component of the watch mechanism and a tool provided to cooperate with said component, such as a screw provided in the movement and a screwdriver arranged to cooperate with the screw, the assembly then constituting watchmaking equipment.

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  • General Physics & Mathematics (AREA)
  • Transmission Devices (AREA)

Abstract

La présente invention propose un mécanisme horloger comprenant au moins deux organes et un dispositif d'entrainement en rotation de l'un desdits organes par l'autre comprenant un élément mâle (1a) porté par l'un desdits organes et un élément femelle (2a) porté par l'autre desdits organes (2) et agencé pour coopérer avec ledit élément mâle (1a). L'élément mâle (1a) présente, en section transversale, une forme définissant globalement un cercle extérieur de diamètre extérieur D et de centre C et comprenant au moins un creux ou un plat (6), symétrique par rapport à un axe passant par le centre C du cercle extérieur et dirigé vers le centre C de manière à être tangent à un cercle inscrit intérieur de centre C et de diamètre inscrit d tel que la différence entre le diamètre extérieur D et le diamètre inscrit d est supérieure ou égale à 8% et inférieure à 20% du diamètre extérieur D. L'élément femelle (2a) présente, en section transversale, la même forme que celle de l'élément mâle (1a) agencée pour recevoir et coopérer avec ledit élément mâle (1a) afin de transmettre un couple de l'un à l'autre desdits organes. La forme en section transversale de l'élément mâle (1a) comprend au moins deux creux ou plats (6) disposés autour du cercle inscrit intérieur (10) pour former entre eux une protubérance (12) les reliant l'un à l'autre, ladite protubérance (12) présentant un sommet (12a) confondu avec un arc du cercle extérieur (4).The present invention provides a watch mechanism comprising at least two members and a device for driving in rotation one of said members by the other comprising a male element (1a) carried by one of said members and a female element (2a ) carried by the other of said members (2) and arranged to cooperate with said male element (1a). The male element (1a) has, in cross section, a shape generally defining an outer circle of outer diameter D and center C and comprising at least one hollow or a flat (6), symmetrical with respect to an axis passing through the center C of the outer circle and directed towards the center C so as to be tangent to an inner inscribed circle with center C and inscribed diameter d such that the difference between the outer diameter D and the inscribed diameter d is greater than or equal to 8% and less than 20% of the outer diameter D. The female element (2a) has, in cross section, the same shape as that of the male element (1a) arranged to receive and cooperate with said male element (1a) in order to transmitting a torque from one of said organs to the other. The cross-sectional shape of the male element (1a) comprises at least two hollows or flats (6) arranged around the inner inscribed circle (10) to form between them a protuberance (12) connecting them to each other , said protuberance (12) having an apex (12a) coincident with an arc of the outer circle (4).

Description

La présente invention concerne un mécanisme horloger comprenant au moins deux organes et un dispositif d'entrainement en rotation de l'un desdits organes par l'autre comprenant un élément mâle porté par l'un desdits organes et un élément femelle porté par l'autre desdits organes et agencé pour coopérer avec ledit élément mâle.The present invention relates to a watch mechanism comprising at least two members and a device for driving in rotation one of said members by the other comprising a male element carried by one of said members and a female element carried by the other. said members and arranged to cooperate with said male element.

Un tel dispositif d'entrainement est par exemple utilisé pour transmettre un couple d'un rochet à un arbre de barillet, l'élément mâle étant un carré prévu sur l'arbre de barillet et l'élément femelle étant un trou carré de forme correspondante, avec le jeu nécessaire pour le montage, creusé dans la planche du rochet et dans lequel s'emboite le carré de l'arbre de barillet.Such a drive device is for example used to transmit a torque from a ratchet to a barrel shaft, the male element being a square provided on the barrel shaft and the female element being a square hole of corresponding shape. , with the clearance necessary for assembly, hollowed out in the ratchet board and in which fits the square of the barrel shaft.

L'utilisation d'un carré pour transmettre une force entre deux organes présente plusieurs inconvénients. Notamment, un carré possède des arêtes vives, de sorte que l'interface entre les deux organes peut être détériorée, le contact se faisant entre des arêtes et des surfaces. De plus, les contraintes liées au contact entre des arêtes et des surfaces se concentrent au niveau de l'interface. En conséquence, lorsque les couples à cette interface sont importants, par exemple dans le cas d'un arbre de barillet et d'un rochet sollicités lors d'un remontage d'une pièce d'horlogerie pour alimenter ladite pièce en énergie, le risque de casser l'arbre au niveau du rochet est très élevé lorsque ledit arbre est sollicité en torsion par le rochet. Ce risque est accru lorsque le diamètre de l'arbre de barillet est réduit. Par ailleurs, avec un assemblage par carré, la pression de contact à l'interface entre les deux organes est importante, de sorte qu'il n'est pas possible d'utiliser des organes réalisés dans un matériau fragile, tel que le silicium ou la céramique.The use of a square to transmit a force between two organs has several drawbacks. In particular, a square has sharp edges, so that the interface between the two members can be damaged, the contact being made between edges and surfaces. In addition, the stresses linked to the contact between edges and surfaces are concentrated at the level of the interface. Consequently, when the torques at this interface are high, for example in the case of a barrel shaft and a ratchet stressed during a winding of a timepiece to supply said part with energy, the risk breaking the shaft at the level of the ratchet is very high when said shaft is twisted by the ratchet. This risk is increased when the diameter of the barrel shaft is reduced. Furthermore, with a square assembly, the contact pressure at the interface between the two members is high, so that it is not possible to use members made of a fragile material, such as silicon or ceramics.

De plus, le carré est un assemblage qui demande beaucoup de jeu, ce qui induit une grande imprécision, préjudiciable dans certaines applications. C'est pourquoi l'homme du métier évite d'utiliser un carré pour assembler deux organes entre lesquels un couple doit être transmis.In addition, the square is an assembly which requires a lot of play, which induces great imprecision, which is detrimental in certain applications. This is why a person skilled in the art avoids using a square to assemble two members between which a torque must be transmitted.

En outre, un élément mâle carré nécessite de réaliser des quarts de tour pour indexer l'élément femelle, ce qui va entrainer une usure supplémentaire lorsque l'un des organes doit être tourné par rapport à l'autre jusqu'à ce que la position d'assemblage soit trouvée.In addition, a square male element requires quarter turns to index the female element, which will cause additional wear when one of the members must be rotated relative to the other until the position assembly is found.

La présente invention vise à remédier à ces inconvénients en proposant un dispositif d'entrainement en rotation d'un organe d'un mécanisme horloger par un autre organe permettant d'améliorer la tenue mécanique de l'organe sollicité en torsion par l'autre organe, afin d'augmenter le couple transmis avant rupture.The present invention aims to remedy these drawbacks by proposing a device for driving in rotation a member of a watch mechanism by another member making it possible to improve the mechanical strength of the member subjected to torsion by the other member. , in order to increase the torque transmitted before breaking.

La présente invention vise également à proposer un dispositif d'entrainement en rotation d'un organe d'un mécanisme horloger par un autre organe permettant, en plus d'augmenter le couple transmis avant rupture, de réduire la pression de contact à l'interface afin de garantir l'intégrité des organes.The present invention also aims to provide a device for driving in rotation a member of a watch mechanism by another member making it possible, in addition to increasing the torque transmitted before breaking, to reduce the contact pressure at the interface. in order to guarantee the integrity of the organs.

A cet effet, la présente invention concerne un mécanisme horloger comprenant au moins deux organes et un dispositif d'entrainement en rotation de l'un desdits organes par l'autre comprenant un élément mâle porté par l'un desdits organes et un élément femelle porté par l'autre desdits organes et agencé pour coopérer avec ledit élément mâle.To this end, the present invention relates to a watch mechanism comprising at least two members and a device for driving in rotation one of said members by the other comprising a male element carried by one of said members and a female element carried. by the other of said members and arranged to cooperate with said male element.

Selon l'invention, l'élément mâle présente, en section transversale, une forme définissant globalement un premier cercle extérieur de diamètre extérieur D et de centre C et comprenant au moins un plat ou un creux, symétrique par rapport à un axe passant par le centre C du cercle extérieur, et dirigé vers le centre C de manière à être tangent à un deuxième cercle inscrit intérieur de centre C et de diamètre inscrit d tel que la différence entre le diamètre extérieur D et le diamètre inscrit d est supérieure ou égale à 8% et strictement inférieure à 20% du diamètre extérieur D.According to the invention, the male element has, in cross section, a shape generally defining a first outer circle of outer diameter D and of center C and comprising at least one flat or a hollow, symmetrical with respect to an axis passing through the center C of the outer circle, and directed towards the center C so as to be tangent to a second inscribed inner circle of center C and of inscribed diameter d such that the difference between the outer diameter D and the inscribed diameter d is greater than or equal to 8% and strictly less than 20% of the outside diameter D.

De plus, selon l'invention, l'élément femelle présente, en section transversale, la même forme que celle de l'élément mâle agencée pour recevoir et coopérer avec ledit élément mâle afin de transmettre un couple de l'un à l'autre desdits organes.In addition, according to the invention, the female element has, in cross section, the same shape as that of the male element arranged to receive and cooperate with said male element in order to transmit a torque from one to the other. of said organs.

La forme présentée par les éléments mâle et femelle selon l'invention permet de transmettre plus de couple avant rupture d'un organe à l'autre qu'un carré.The shape presented by the male and female elements according to the invention makes it possible to transmit more torque before breaking from one member to the other than a square.

D'une manière particulièrement avantageuse, le creux est circulaire et présente un rayon définissant un pointage égal à la somme du rayon du cercle inscrit intérieur et du rayon du creux circulaire, ledit pointage étant inférieur à 300% du rayon du cercle inscrit intérieur.In a particularly advantageous manner, the hollow is circular and has a radius defining a point equal to the sum of the radius of the inner inscribed circle and the radius of the circular hollow, said point being less than 300% of the radius of the inner inscribed circle.

Cette forme présentée par les éléments mâle et femelle selon l'invention permet en plus de minimiser la pression de contact à l'interface des organes, et ainsi de pouvoir utiliser des matériaux fragiles pour leur construction.This shape presented by the male and female elements according to the invention also makes it possible to minimize the contact pressure at the interface of the components, and thus to be able to use fragile materials for their construction.

La présente invention concerne également une pièce d'horlogerie comprenant un mécanisme tel que défini ci-dessus.The present invention also relates to a timepiece comprising a mechanism as defined above.

La présente invention concerne également un équipement d'horlogerie comprenant un mécanisme tel que défini ci-dessus.The present invention also relates to timepiece equipment comprising a mechanism as defined above.

D'autres caractéristiques et avantages de la présente invention apparaîtront à la lecture de la description détaillée suivante de plusieurs modes de réalisation de l'invention, donnés à titre d'exemples non limitatifs, et faite en référence aux dessins annexés dans lesquels :

  • la figure 1 est une vue isométrique d'un rochet monté sur un arbre de barillet selon un premier mode de réalisation de l'invention ;
  • la figure 2 est une vue isométrique d'une extrémité d'un arbre de barillet seul, présentant un élément mâle selon une première variante du premier mode de réalisation ;
  • la figure 3 est une vue de dessus du rochet seul, présentant un élément femelle selon la première variante correspondant à la figure 2 ;
  • la figure 4 est une vue de dessus de l'élément mâle de la figure 2 ;
  • les figures 5 à 7 sont des vues de dessus représentant d'autres variantes du premier mode de réalisation des éléments mâles et femelles de l'invention ;
  • la figure 8 est une vue de dessus d'un rochet monté sur un arbre de barillet selon un deuxième mode de réalisation de l'invention ; et
  • la figure 9 est une vue de dessus agrandie de l'élément mâle et de l'élément femelle de la figure 8.
Other characteristics and advantages of the present invention will become apparent on reading the following detailed description of several embodiments of the invention, given by way of non-limiting examples, and made with reference to the appended drawings in which:
  • the figure 1 is an isometric view of a ratchet mounted on a barrel shaft according to a first embodiment of the invention;
  • the figure 2 is an isometric view of one end of a single barrel shaft, showing a male element according to a first variant of the first embodiment;
  • the figure 3 is a top view of the ratchet alone, presenting a female element according to the first variant corresponding to the figure 2 ;
  • the figure 4 is a top view of the male element of the figure 2 ;
  • the figures 5 to 7 are top views showing other variants of the first embodiment of the male and female elements of the invention;
  • the figure 8 is a top view of a ratchet mounted on a barrel shaft according to a second embodiment of the invention; and
  • the figure 9 is an enlarged top view of the male element and the female element of the figure 8 .

En référence aux figures 1 à 3 et 8, la présente invention concerne un mécanisme horloger comprenant au moins deux organes 1, 2 et un dispositif d'entrainement en rotation de l'un desdits organes par l'autre comprenant un élément mâle porté par l'un desdits organes et un élément femelle porté par l'autre desdits organes et agencé pour coopérer avec ledit élément mâle, l'un desdits organes 1, 2 entrainant en rotation l'autre organe.With reference to figures 1 to 3 and 8 , the present invention relates to a watch mechanism comprising at least two members 1, 2 and a device for driving in rotation one of said members by the other comprising a male element carried by one of said members and a female element carried by the other of said members and arranged to cooperate with said male element, one of said members 1, 2 rotating the other member.

Dans la description qui suit, l'organe 1 est un arbre ou une tige définissant un axe longitudinal et portant à son extrémité l'élément mâle 1a et l'organe 2 présente une empreinte creusée constituant l'élément femelle 2a dans laquelle l'élément mâle 1a est introduit pour assurer une transmission de couple.In the following description, the member 1 is a shaft or a rod defining a longitudinal axis and carrying at its end the male element 1a and the member 2 has a hollowed out indentation constituting the female element 2a in which the element male 1a is introduced to ensure torque transmission.

L'organe 1 est par exemple un arbre de barillet, l'organe 2 étant un rochet agencé pour être monté sur l'extrémité de l'arbre de barillet, comme représenté sur la figure 1, afin de transmettre un couple à l'arbre de barillet, par l'intermédiaire de la tige de remontoir actionnée par un utilisateur, permettant le remontage de la pièce d'horlogerie.The member 1 is for example a barrel shaft, the member 2 being a ratchet arranged to be mounted on the end of the barrel shaft, as shown in the figure. figure 1 , in order to transmit a torque to the barrel shaft, by means of the winding stem actuated by a user, allowing the winding of the timepiece.

Il est bien évident que les organes 1 et 2 portant les éléments mâle et femelle peuvent être constitués par d'autres couples d'organes horlogers, tels qu'une tige de remontoir et son pignon coulant, ou une tige de remontoir et une clé coopérant avec la tige de remontoir pour remonter et/ou mettre à l'heure une pièce d'horlogerie, ou tout autre composant du mécanisme horloger et un outil prévu pour coopérer avec ledit composant. Il est bien évident également que l'élément mâle peut être porté par l'organe mené, l'élément femelle étant prévu sur l'organe menant, ou inversement l'élément mâle peut être porté par l'organe menant, l'élément femelle étant alors prévu sur l'organe mené.It is obvious that the members 1 and 2 carrying the male and female elements can be formed by other pairs of watch members, such as a winding stem and its sliding pinion, or a winding stem and a cooperating key. with the winding stem for winding and / or setting the time a timepiece, or any other component of the watch mechanism and a tool provided to cooperate with said component. It is also quite evident that the element the male can be carried by the driven member, the female element being provided on the driving member, or conversely the male element can be carried by the driving member, the female element then being provided on the driven member.

Conformément à l'invention, et en référence plus spécialement aux figures 4, 5 et 9, l'élément mâle 1a est taillé et façonné à l'extrémité de l'organe 1 sorte qu'il présente, en section transversale, une forme définissant globalement un cercle extérieur 4 de diamètre extérieur D et de centre C, son contour extérieur étant partiellement confondu avec ledit cercle extérieur 4, et comprenant, débouchant à sa périphérie extérieure, au moins un creux 6 correspondant à un premier mode de réalisation selon les figures 4 et 5, ou au moins un plat 6 correspondant à un deuxième mode de réalisation selon la figure 9, symétrique par rapport à un axe 8 passant par le centre C du cercle extérieur 4.In accordance with the invention, and with particular reference to figures 4, 5 and 9 , the male element 1a is cut and shaped at the end of the member 1 so that it has, in cross section, a shape generally defining an outer circle 4 of outer diameter D and of center C, its outer contour being partially coincident with said outer circle 4, and comprising, opening out at its outer periphery, at least one hollow 6 corresponding to a first embodiment according to figures 4 and 5 , or at least one dish 6 corresponding to a second embodiment according to figure 9 , symmetrical with respect to an axis 8 passing through the center C of the outer circle 4.

Selon le premier mode de réalisation, comme représenté sur les figures 1 à 7, le creux 6 peut être de forme circulaire, de rayon R, et de centre C' situé à l'extérieur du cercle extérieur 4.According to the first embodiment, as shown in the figures 1 to 7 , the hollow 6 may be of circular shape, of radius R, and of center C 'located outside the outer circle 4.

Le creux 6 peut présenter une autre forme, par exemple une forme polygonale en V à deux côtés ou en U à trois côtés identiques ou différents.The hollow 6 may have another shape, for example a V-shaped polygonal shape with two sides or a U-shaped shape with three identical or different sides.

Le creux ou le plat 6 est dirigé vers le centre C de manière à être tangent à un cercle inscrit intérieur 10 de centre C, concentrique au cercle extérieur 4, et de diamètre inscrit d tel que la différence entre le diamètre extérieur D et le diamètre inscrit d est supérieure ou égale à 8% et inférieure à 20% du diamètre extérieur D.The hollow or the flat 6 is directed towards the center C so as to be tangent to an inner inscribed circle 10 of center C, concentric to the outer circle 4, and of inscribed diameter d such that the difference between the outer diameter D and the diameter inscribed d is greater than or equal to 8% and less than 20% of the outside diameter D.

Dans le cas plus spécifique du creux 6, ledit creux 6 est concave et dirigé vers le centre C, vers l'intérieur de l'élément mâle 1a, de manière à présenter un sommet 6a définissant ledit cercle inscrit intérieur 10, ledit sommet 6a du creux 6 étant défini comme le point du creux 6 qui est tangent au cercle inscrit intérieur 10.In the more specific case of the hollow 6, said hollow 6 is concave and directed towards the center C, towards the inside of the male element 1a, so as to present an apex 6a defining said inner inscribed circle 10, said apex 6a of the hollow 6 being defined as the point of hollow 6 which is tangent to the inner inscribed circle 10.

De préférence, la différence entre le diamètre extérieur D et le diamètre inscrit d est comprise entre 10% et 19% du diamètre extérieur D, et plus préférentiellement entre 12% et 19% du diamètre extérieur D, et plus spécifiquement entre 13% et 15% du diamètre extérieur D dans le cas d'un plat.Preferably, the difference between the outside diameter D and the inscribed diameter d is between 10% and 19% of the outside diameter D, and more preferably between 12% and 19% of the outside diameter D, and more specifically between 13% and 15%. % of the outside diameter D in the case of a dish.

Le diamètre extérieur D correspond de préférence au diamètre de l'arbre 1, qui peut être de l'ordre de 1 mm pour un arbre de barillet.The outer diameter D preferably corresponds to the diameter of the shaft 1, which may be of the order of 1 mm for a barrel shaft.

Selon le premier mode de réalisation, et lorsque le creux 6 est de forme circulaire, son rayon R définit un pointage P égal à la somme du rayon du cercle inscrit intérieur 10 et du rayon R du creux circulaire 6. D'une manière particulièrement avantageuse, ledit pointage P peut être inférieur à 300%, et de préférence inférieur à 200%, du rayon du cercle inscrit intérieur 10.According to the first embodiment, and when the hollow 6 is circular in shape, its radius R defines a point P equal to the sum of the radius of the inner inscribed circle 10 and the radius R of the circular hollow 6. In a particularly advantageous manner , said point P may be less than 300%, and preferably less than 200%, of the radius of the inner inscribed circle 10.

De préférence, ledit pointage P est inférieur à 150% du rayon du cercle inscrit intérieur 10.Preferably, said point P is less than 150% of the radius of the inner inscribed circle 10.

D'une manière avantageuse, le creux circulaire 6 peut présenter un rayon R choisi pour que le centre C' dudit creux circulaire 6 se situe entre le cercle inscrit intérieur 10 et le cercle extérieur 4, comme le montre la figure 7.Advantageously, the circular hollow 6 may have a radius R chosen so that the center C 'of said circular hollow 6 is situated between the inner inscribed circle 10 and the outer circle 4, as shown in FIG. figure 7 .

D'une manière avantageuse du premier ou deuxième mode de réalisation, la forme en section transversale de l'élément mâle 1a comprend au moins deux creux ou plats 6, identiques, disposés autour du cercle inscrit intérieur 10 suffisamment à proximité l'un de l'autre pour former entre eux une protubérance radiale convexe 12, les reliant l'un à l'autre par leurs bords en regard. Ladite protubérance 12 s'étendant donc en direction de l'extérieur de l'élément mâle 1a selon un axe 14 passant par le centre C du cercle extérieur 4, ladite protubérance 12 étant symétrique par rapport audit axe 14. La protubérance 12 présente un sommet 12a confondu avec un arc de cercle du cercle extérieur 4. Cela signifie qu'en fonction de la largeur de la protubérance 12, son sommet 12a est confondu avec un arc de cercle du cercle extérieur 4 plus ou moins grand, et différent d'un seul point commun. De cette façon, le sommet 12a de la protubérance 12 ne comprend pas d'arête vive dont la présence n'est pas recommandée pour les raisons indiquées précédemment. La précision des outils d'usinage traditionnellement utilisés en horlogerie est telle que les secteurs angulaires α peuvent être réalisés, typiquement par décolletage, avec une meilleure précision que des arêtes. Ainsi, une protubérance 12 présentant un sommet 12a confondu avec un arc du cercle extérieur 4 est particulièrement avantageuse en termes de fabrication et de précision d'usinage. Il en va de même pour la protubérance 18 correspondante de l'élément femelle 2a.Advantageously of the first or second embodiment, the cross-sectional shape of the male element 1a comprises at least two hollows or plates 6, identical, arranged around the inner inscribed circle 10 sufficiently close to one of the l 'other to form between them a convex radial protuberance 12, connecting them to each other by their opposite edges. Said protuberance 12 therefore extending in the direction of the outside of the male element 1a along an axis 14 passing through the center C of the outer circle 4, said protuberance 12 being symmetrical with respect to said axis 14. The protuberance 12 has an apex 12a coincides with an arc of a circle of the outer circle 4. This means that depending on the width of the protuberance 12, its apex 12a coincides with a more or less large arc of a circle of the outer circle 4, and different from a only common point. In this way, the top 12a of the protuberance 12 does not include a sharp edge, the presence of which is not recommended for the reasons indicated above. The precision of the machining tools traditionally used in watchmaking is such that the angular sectors α can be produced, typically by bar turning, with better precision than edges. Thus, a protuberance 12 having an apex 12a coincident with with an arc of the outer circle 4 is particularly advantageous in terms of manufacturing and machining precision. The same applies to the corresponding protuberance 18 of the female element 2a.

De préférence, l'arc de cercle, défini par le secteur angulaire α (cf. figure 5) correspondant à la largeur des protubérances 12 est tel que l'angle α est compris entre 5° et 340°, de préférence supérieur ou égal à 10°, encore plus préférentiellement supérieur ou égal à 15°, préférentiellement supérieur ou égal 20°, en fonction du nombre de protubérances et de creux ou de plats. Typiquement, pour une configuration à six protubérances et à six creux comme représentée sur les figures 5 à 7, l'angle α est compris entre 10° et 50°, et entre 20° et 40° pour une configuration à quatre protubérances et quatre plats comme représentée sur la figure 9.Preferably, the arc of a circle, defined by the angular sector α (cf. figure 5 ) corresponding to the width of the protuberances 12 is such that the angle α is between 5 ° and 340 °, preferably greater than or equal to 10 °, even more preferably greater than or equal to 15 °, preferably greater than or equal to 20 °, depending on the number of protrusions and hollows or flats. Typically, for a six protrusion and six recess configuration as shown in the figures 5 to 7 , the angle α is between 10 ° and 50 °, and between 20 ° and 40 ° for a configuration with four protrusions and four flats as shown on figure 9 .

Conformément à l'invention, l'empreinte creusée dans l'organe 2 constituant l'élément femelle 2a présente, en section transversale, la même forme que celle de l'élément mâle 1a définie ci-dessus, agencée pour recevoir et coopérer avec ledit élément mâle 1a afin de transmettre un couple de l'un à l'autre desdits organes 1 et 2.According to the invention, the imprint made in the member 2 constituting the female element 2a has, in cross section, the same shape as that of the male element 1a defined above, arranged to receive and cooperate with said male element 1a in order to transmit a torque from one to the other of said members 1 and 2.

A cet effet, l'élément femelle 2a comprend en alternance des creux 16 et des protubérances 18 contiguës par leurs deux côtés à l'un de ces creux 16, les creux 16 présentant la même forme que les creux 6 décrits ci-dessus et les protubérances 18 présentant la même forme que les protubérances 12 décrites ci-dessus, de sorte que l'élément femelle 2a épouse les contours de l'élément mâle 1a sur l'ensemble de sa section transversale, ledit élément mâle 1a s'emboitant ou s'encastrant parfaitement dans l'élément femelle 2a. Seules les dimensions de l'élément femelle 2a sont adaptées de manière à prévoir le jeu juste nécessaire pour le montage de l'élément mâle 1a dans l'élément femelle 2a.For this purpose, the female element 2a comprises alternately hollows 16 and protuberances 18 contiguous by their two sides to one of these hollows 16, the hollows 16 having the same shape as the hollows 6 described above and the hollows 6. protrusions 18 having the same shape as the protrusions 12 described above, so that the female element 2a follows the contours of the male element 1a over its entire cross section, said male element 1a fitting together or s 'fitting perfectly into the female element 2a. Only the dimensions of the female element 2a are adapted so as to provide the clearance just necessary for mounting the male element 1a in the female element 2a.

Dans les cas particuliers où la forme de la section transversale de l'élément mâle 1a comprend au moins une protubérance 12, la forme et les dimensions de la section transversale de l'élément femelle 2a sont avantageusement choisies pour que l'ajustement entre les éléments mâle 1a et femelle 2a soit plus resserré au niveau des portions en arc de cercle que comprennent les protubérances 12, 18. En effet, l'usinage de ces portions est très précis et un ajustement serré à ce niveau favorise donc une bonne concentricité des éléments mâle 1a et femelle 2a. Il en résulte une transmission de couple de constante améliorée. Cela est particulièrement intéressant dans le cas où l'organe 1 est un arbre de barillet et l'organe 2 un rochet, et encore plus particulièrement lorsque de tels organes sont utilisés dans un montage en série de barillets.In the particular cases where the shape of the cross section of the male element 1a comprises at least one protuberance 12, the shape and dimensions of the cross section of the female element 2a are advantageously chosen. so that the adjustment between the male 1a and female 2a elements is tighter at the level of the arcuate portions that include the protuberances 12, 18. In fact, the machining of these portions is very precise and a tight fit to this level therefore promotes good concentricity of the male 1a and female 2a elements. This results in improved constant torque transmission. This is particularly advantageous in the case where the member 1 is a barrel shaft and the member 2 a ratchet, and even more particularly when such members are used in a series assembly of barrels.

Il peut typiquement être laissé plus de jeu entre les éléments mâle 1a et femelle 2a au niveau des autres portions du contour desdits éléments 1a, 2a, notamment au niveau des portions comprenant des plats tels que les plats 6, dont l'usinage est généralement moins précis, comme illustré à la figure 9.More play can typically be left between the male 1a and female 2a elements at the level of the other portions of the outline of said elements 1a, 2a, in particular at the level of the portions comprising flats such as flats 6, the machining of which is generally less. precise, as shown in figure 9 .

D'une manière avantageuse, l'élément mâle 1a et l'élément femelle 2a comprennent au moins trois creux ou plats 6, 16 alternés avec au moins trois protubérances 12, 18 respectivement, régulièrement répartis autour de leur cercle inscrit intérieur respectif. Ici, seul le cercle inscrit intérieur 10 de l'élément mâle 1a est représenté. De préférence, l'élément mâle 1a et l'élément femelle 2a comprennent entre quatre et huit creux ou plats 6, 16 régulièrement répartis autour de leur cercle inscrit intérieur respectif, et de préférence au moins cinq creux 6, 16 et cinq protubérances 12, 18. Selon une variante particulièrement préférée du premier mode de réalisation, l'élément mâle 1a et l'élément femelle 2a comprennent six creux 6, 16 alternés avec six protubérances 12, 18, régulièrement répartis autour de leur cercle inscrit intérieur respectif, comme représenté sur les figures 1 à 7. Selon une variante particulièrement préférée du deuxième mode de réalisation, l'élément mâle 1a et l'élément femelle 2a comprennent quatre plats 6, 16 alternés avec quatre protubérances 12, 18, régulièrement répartis autour de leur cercle inscrit intérieur respectif, comme représenté sur les figures 8 et 9.Advantageously, the male element 1a and the female element 2a comprise at least three hollows or flats 6, 16 alternating with at least three protuberances 12, 18 respectively, regularly distributed around their respective inner inscribed circle. Here, only the inner inscribed circle 10 of the male element 1a is shown. Preferably, the male element 1a and the female element 2a comprise between four and eight hollows or dishes 6, 16 regularly distributed around their respective inner inscribed circle, and preferably at least five hollows 6, 16 and five protuberances 12, 18. According to a particularly preferred variant of the first embodiment, the male element 1a and the female element 2a comprise six recesses 6, 16 alternating with six protuberances 12, 18, regularly distributed around their respective inner inscribed circle, as shown. on the figures 1 to 7 . According to a particularly preferred variant of the second embodiment, the male element 1a and the female element 2a comprise four plates 6, 16 alternating with four protuberances 12, 18, regularly distributed around their respective inner inscribed circle, as shown in the figures. figures 8 and 9 .

Il est bien évident que les deux modes de réalisation de l'invention peuvent être combinés de sorte que l'élément mâle et son élément femelle correspondant peuvent avoir respectivement en section transversale une forme qui comprend au moins un creux et au moins un plat. De même, sur une même forme, les creux peuvent être différents les uns des autres, en respectant les conditions du cercle inscrit intérieur.It is obvious that the two embodiments of the invention can be combined so that the male element and its corresponding female element can respectively have in cross section a shape which comprises at least one hollow and at least one flat. Likewise, on the same shape, the hollows may be different from one another, while respecting the conditions of the inner inscribed circle.

Sur l'arbre 1, les protubérances 12 forment des arêtes longitudinales 20 reliées à la surface du corps de l'arbre 1 et les creux ou plats 6 sont reliés à la surface du corps de l'arbre par des épaulements 22, comme le montre la figure 2. Les épaulements 22 servent de butées pour bloquer en position l'organe 2 monté sur l'organe 1.On the shaft 1, the protuberances 12 form longitudinal ridges 20 connected to the surface of the body of the shaft 1 and the hollows or flats 6 are connected to the surface of the body of the shaft by shoulders 22, as shown. the figure 2 . The shoulders 22 serve as stops to block the member 2 mounted on the member 1 in position.

Les figures 5 à 7 représentent différentes variantes du premier mode de réalisation de l'invention, obtenues en faisant varier la différence entre le diamètre extérieur D et le diamètre inscrit d ainsi que le pointage, les éléments mâle et femelle présentant six creux 6 alternés avec six protubérances 12, régulièrement répartis autour du cercle inscrit intérieur 10.The figures 5 to 7 show different variants of the first embodiment of the invention, obtained by varying the difference between the outside diameter D and the inscribed diameter d as well as the pointing, the male and female elements having six recesses 6 alternating with six protuberances 12, regularly distributed around the inner inscribed circle 10.

L'angle β (cf. figure 5) entre la tangente passant par le point de raccord d'un creux 6 et de la protubérance adjacente 12 et l'axe de symétrie 14 de ladite protubérance adjacente 12 est supérieur à 22° et de préférence supérieur à 25°.The angle β (cf. figure 5 ) between the tangent passing through the point of connection of a hollow 6 and the adjacent protuberance 12 and the axis of symmetry 14 of said adjacent protuberance 12 is greater than 22 ° and preferably greater than 25 °.

Dans la variante des figures 5 et 7, la différence entre le diamètre extérieur D et le diamètre inscrit d est de 18%, et dans la variante de la figure 6, la différence entre le diamètre extérieur D et le diamètre inscrit d est de 14%.In the variant of figures 5 and 7 , the difference between the outside diameter D and the inscribed diameter d is 18%, and in the variant of the figure 6 , the difference between the outside diameter D and the inscribed diameter d is 14%.

Dans la variante des figures 5 et 6, le pointage P est inférieur à 200% du rayon du cercle inscrit intérieur 10.In the variant of figures 5 and 6 , the pointing P is less than 200% of the radius of the inner inscribed circle 10.

Dans la variante de la figure 7, le pointage P est inférieur à 150% du rayon du cercle inscrit intérieur 10. Plus spécifiquement, le pointage P de la variante de la figure 7, pour laquelle le centre C' du creux circulaire 6 se situant entre le cercle inscrit intérieur 10 et le cercle extérieur 4, est de l'ordre de 120% du rayon du cercle inscrit intérieur 10.In the variant of the figure 7 , the pointing P is less than 150% of the radius of the inner inscribed circle 10. More specifically, the pointing P of the variant of the figure 7 , for which the center C 'of the circular hollow 6 lying between the inner inscribed circle 10 and the outer circle 4, is of the order of 120% of the radius of the inner inscribed circle 10.

On a mesuré le couple transmis avant rupture d'un arbre de barillet de diamètre D de 1 mm et la pression de contact à l'interface de l'arbre de barillet et du rochet présentant respectivement les éléments mâle et femelle correspondant aux figures 5 à 7.We measured the torque transmitted before rupture of a barrel shaft of diameter D of 1 mm and the contact pressure at the interface of the barrel shaft and the ratchet having respectively the male and female elements corresponding to the figures 5 to 7 .

A titre comparatif, les mesures ont également été effectuées avec des éléments mâle/femelle de forme complémentaire carrée de dimensions équivalentes.By way of comparison, the measurements were also carried out with male / female elements of complementary square shape of equivalent dimensions.

Le couple transmis avant rupture de l'arbre de barillet pour les éléments mâle/femelle de la présente invention est supérieur à celui obtenu avec les éléments mâle/femelle comparatifs de forme carrée.The torque transmitted before rupture of the barrel shaft for the male / female elements of the present invention is greater than that obtained with the comparative male / female elements of square shape.

Les éléments mâle/femelle de la présente invention permettent donc d'augmenter la tenue de l'organe portant l'élément mâle par rapport à un assemblage par carré traditionnellement utilisé en horlogerie.The male / female elements of the present invention therefore make it possible to increase the strength of the member carrying the male element with respect to a square assembly traditionally used in watchmaking.

De plus, la pression de contact pour les éléments mâle/femelle de la présente invention est inférieure à celle obtenue avec les éléments mâle/femelle comparatifs de forme carrée.In addition, the contact pressure for the male / female members of the present invention is lower than that obtained with the comparative square shaped male / female members.

Les éléments mâle/femelle de la présente invention permettent donc de réduire la pression de contact à l'interface des organes 1 et 2 par rapport à un assemblage par carré traditionnellement utilisé en horlogerie. L'usure à l'interface des organes 1 et 2 est donc réduite.The male / female elements of the present invention therefore make it possible to reduce the contact pressure at the interface of the components 1 and 2 compared to a square assembly traditionally used in watchmaking. Wear at the interface of components 1 and 2 is therefore reduced.

En outre, la variante de la figure 6 qui présente une différence entre le diamètre extérieur D et le diamètre inscrit d inférieure à celle des figures 5 et 7 permet d'obtenir un couple transmis avant rupture supérieur à celui obtenu avec les variantes des figures 5 et 7.In addition, the variant of the figure 6 which has a difference between the outside diameter D and the inscribed diameter d less than that of the figures 5 and 7 makes it possible to obtain a torque transmitted before breaking greater than that obtained with the variants of figures 5 and 7 .

Par ailleurs, la variante de la figure 7 permet d'obtenir une pression de contact inférieure à celle obtenue avec la variante de la figure 5.Moreover, the variant of the figure 7 makes it possible to obtain a contact pressure lower than that obtained with the variant of the figure 5 .

En conséquence, une diminution de la différence entre le diamètre extérieur D et le diamètre inscrit d permet d'augmenter le couple transmis avant rupture et une diminution du pointage P permet de diminuer la pression de contact, ce qui permet de pouvoir adapter la forme des éléments mâle/femelle si l'on souhaite réaliser les organes 1 et 2 en des matériaux tendres ou fragiles, tel que le laiton, le silicium ou une céramique, à la place de l'acier traditionnellement utilisé pour des assemblages par carré.Consequently, a decrease in the difference between the outside diameter D and the inscribed diameter d makes it possible to increase the torque transmitted before breaking and a decrease in the pointing P makes it possible to decrease the contact pressure, which allows you to adapt the shape of the male / female elements if you want to make the components 1 and 2 in soft or fragile materials, such as brass, silicon or ceramic, instead of the steel traditionally used for assemblies per square.

De plus, lorsque le nombre de creux ou plats/protubérances est choisi au moins égal à cinq, l'indexage des organes 1 et 2, par exemple l'indexage du rochet par rapport à l'arbre de barillet, sera plus aisé qu'avec un assemblage par carré.In addition, when the number of hollows or dishes / protuberances is chosen to be at least equal to five, the indexing of the members 1 and 2, for example the indexing of the ratchet relative to the barrel shaft, will be easier than with a square assembly.

Enfin, les formes identiques de la section transversale de l'élément mâle et de l'élément femelle permettent d'améliorer le guidage entre ces éléments, par exemple par rapport à un accouplement classique utilisant un arbre et un rochet présentant un trou de forme carrée. L'accouplement par carré entraine beaucoup de jeu alors qu'avec la présente invention, les jeux sont resserrés, la planéité du rochet sur l'arbre par exemple étant améliorée.Finally, the identical shapes of the cross section of the male element and of the female element make it possible to improve the guidance between these elements, for example compared to a conventional coupling using a shaft and a ratchet having a square-shaped hole. . The square coupling causes a lot of play while with the present invention, the play is tightened, the flatness of the ratchet on the shaft for example being improved.

Le mécanisme de l'invention peut être utilisé pour deux organes incorporés dans un mouvement ou lorsque l'un des organes est incorporé dans le mouvement et l'autre organe étant extérieur au mouvement, tel qu'une tige de remontoir et une clé coopérant avec la tige de remontoir pour remonter et/ou mettre à l'heure une pièce d'horlogerie, ou tout autre composant du mécanisme horloger et un outil prévu pour coopérer avec ledit composant, tels qu'une vis prévue dans le mouvement et un tournevis agencé pour coopérer avec la vis, l'ensemble constituant alors un équipement horloger.The mechanism of the invention can be used for two organs incorporated in a movement or when one of the organs is incorporated in the movement and the other organ being external to the movement, such as a winding rod and a key cooperating with the winding stem for winding and / or setting the time a timepiece, or any other component of the watch mechanism and a tool provided to cooperate with said component, such as a screw provided in the movement and a screwdriver arranged to cooperate with the screw, the assembly then constituting watchmaking equipment.

Claims (12)

Mécanisme horloger comprenant au moins deux organes (1, 2) et un dispositif d'entrainement en rotation de l'un desdits organes (1, 2) par l'autre comprenant un élément mâle (1a) porté par l'un desdits organes (1) et un élément femelle (2a) porté par l'autre desdits organes (2) et agencé pour coopérer avec ledit élément mâle (1a), l'élément mâle (1a) présentant, en section transversale, une forme définissant globalement un cercle extérieur (4) de diamètre extérieur D et de centre C et comprenant au moins un plat ou un creux (6), symétrique par rapport à un axe (8) passant par le centre C du cercle extérieur (4) et dirigé vers le centre C de manière à être tangent à un cercle inscrit intérieur (10) de centre C et de diamètre inscrit d tel que la différence entre le diamètre extérieur D et le diamètre inscrit d est supérieure ou égale à 8% et inférieure à 20% du diamètre extérieur D, et l'élément femelle (2a) présentant, en section transversale, la même forme que celle de l'élément mâle (1a) agencée pour recevoir et coopérer avec ledit élément mâle (1a) afin de transmettre un couple de l'un à l'autre desdits organes (1, 2), ledit mécanisme étant caractérisé en ce que la forme en section transversale de l'élément mâle (1a) comprend au moins deux creux ou plats (6) disposés autour du cercle inscrit intérieur (10) pour former entre eux une protubérance (12) les reliant l'un à l'autre, ladite protubérance (12) présentant un sommet (12a) confondu avec un arc du cercle extérieur (4).Watchmaking mechanism comprising at least two members (1, 2) and a device for driving in rotation one of said members (1, 2) by the other comprising a male element (1a) carried by one of said members ( 1) and a female element (2a) carried by the other of said members (2) and arranged to cooperate with said male element (1a), the male element (1a) having, in cross section, a shape generally defining a circle exterior (4) with exterior diameter D and center C and comprising at least one flat or hollow (6), symmetrical with respect to an axis (8) passing through the center C of the exterior circle (4) and directed towards the center C so as to be tangent to an inscribed inner circle (10) with center C and inscribed diameter d such that the difference between the outer diameter D and the inscribed diameter d is greater than or equal to 8% and less than 20% of the diameter outer D, and the female element (2a) having, in cross section, the same shape as that of the male element ( 1a) arranged to receive and cooperate with said male element (1a) in order to transmit a torque from one to the other of said members (1, 2), said mechanism being characterized in that the cross-sectional shape of the male element (1a) comprises at least two hollows or flats (6) arranged around the inner inscribed circle (10) to form between them a protuberance (12) connecting them to each other, said protuberance (12) having a vertex (12a) coincident with an arc of the outer circle (4). Mécanisme horloger selon l'une des revendications précédentes, caractérisé en ce que la différence entre le diamètre extérieur D et le diamètre inscrit d est comprise entre 10% et 19% du diamètre extérieur D.Watch mechanism according to one of the preceding claims, characterized in that the difference between the outside diameter D and the inscribed diameter d is between 10% and 19% of the outside diameter D. Mécanisme horloger selon la revendication 2, caractérisé en ce que la différence entre le diamètre extérieur D et le diamètre inscrit d est comprise entre 12% et 19% du diamètre extérieur D.Watch mechanism according to Claim 2, characterized in that the difference between the outside diameter D and the inscribed diameter d is between 12% and 19% of the outside diameter D. Mécanisme horloger selon l'une des revendications précédentes, caractérisé en ce que le creux (6) est circulaire.Watch mechanism according to one of the preceding claims, characterized in that the hollow (6) is circular. Mécanisme horloger selon la revendication 4, caractérisé en ce que le creux circulaire (6) présente un rayon (R) définissant un pointage (P) égal à la somme du rayon du cercle inscrit intérieur (10) et du rayon (R) du creux circulaire (6), le pointage (P) étant inférieur à 300%, et de préférence à 200%, du rayon du cercle inscrit intérieur (10).Watch mechanism according to Claim 4, characterized in that the circular hollow (6) has a radius (R) defining a pointing (P) equal to the sum of the radius of the inner inscribed circle (10) and of the radius (R) of the hollow circular (6), the pointing (P) being less than 300%, and preferably less than 200%, of the radius of the inner inscribed circle (10). Mécanisme horloger selon la revendication 5, caractérisé en ce que ledit pointage (P) est inférieur à 150% du rayon du cercle inscrit intérieur (10).Watch mechanism according to claim 5, characterized in that said pointing (P) is less than 150% of the radius of the inner inscribed circle (10). Mécanisme horloger selon l'une des revendications 4 à 6, caractérisé en ce que le creux circulaire (6) présente un centre (C') se situant entre le cercle inscrit intérieur (10) et le cercle extérieur (4).Watch mechanism according to one of claims 4 to 6, characterized in that the circular hollow (6) has a center (C ') lying between the inner inscribed circle (10) and the outer circle (4). Mécanisme horloger selon l'une des revendications précédentes, caractérisé en ce que l'élément mâle (1a) et l'élément femelle (2a) comprennent au moins trois creux ou plats (6, 16) régulièrement répartis autour de leur cercle inscrit intérieur (10).Watch mechanism according to one of the preceding claims, characterized in that the male element (1a) and the female element (2a) comprise at least three hollows or dishes (6, 16) regularly distributed around their inner inscribed circle ( 10). Mécanisme horloger selon l'une des revendications précédentes, caractérisé en ce que l'élément mâle (1a) et l'élément femelle (2a) comprennent entre quatre et huit creux ou plats (6, 16) régulièrement répartis autour de leur cercle inscrit intérieur (10), et de préférence six creux ou plats (6, 16) régulièrement répartis autour de leur cercle inscrit intérieur (10).Watch mechanism according to one of the preceding claims, characterized in that the male element (1a) and the female element (2a) comprise between four and eight hollows or flats (6, 16) regularly distributed around their inner inscribed circle (10), and preferably six hollows or dishes (6, 16) regularly distributed around their inner inscribed circle (10). Mécanisme horloger selon l'une des revendications précédentes, caractérisé en ce que l'organe (1) portant l'élément mâle (1a) est un arbre de barillet, et l'organe (2) portant l'élément femelle (2a) est un rochet.Watch mechanism according to one of the preceding claims, characterized in that the member (1) carrying the male element (1a) is a barrel shaft, and the member (2) carrying the female element (2a) is a ratchet. Pièce d'horlogerie comprenant un mécanisme selon l'une des revendications 1 à 10.Timepiece comprising a mechanism according to one of claims 1 to 10. Equipement horloger comprenant un mécanisme selon l'une des revendications 1 à 10.Watchmaking equipment comprising a mechanism according to one of claims 1 to 10.
EP20191752.3A 2019-08-20 2020-08-19 Timepiece mechanism comprising a device for rotating one element by another Pending EP3822708A1 (en)

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EP19192667 2019-08-20

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR376790A (en) * 1907-04-16 1907-08-20 Mueller-Schlenker Fa Winding device for pendulums with combined movement and alarm mechanism
CH699318A2 (en) * 2008-08-15 2010-02-15 Nivarox Sa Composite gear system for e.g. exhaust wheel in timepiece, has attachment device provided between pinion and toothed wheel that is made of micro-machinable material, so as to avoid displacement of pinion with respect to toothed wheel
CH713389A1 (en) * 2017-01-27 2018-07-31 Richemont Int Sa System linking a tree to a room.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR376790A (en) * 1907-04-16 1907-08-20 Mueller-Schlenker Fa Winding device for pendulums with combined movement and alarm mechanism
CH699318A2 (en) * 2008-08-15 2010-02-15 Nivarox Sa Composite gear system for e.g. exhaust wheel in timepiece, has attachment device provided between pinion and toothed wheel that is made of micro-machinable material, so as to avoid displacement of pinion with respect to toothed wheel
CH713389A1 (en) * 2017-01-27 2018-07-31 Richemont Int Sa System linking a tree to a room.

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