EP2367075B1 - Winding crown for a clock piece - Google Patents

Winding crown for a clock piece Download PDF

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Publication number
EP2367075B1
EP2367075B1 EP10156794.9A EP10156794A EP2367075B1 EP 2367075 B1 EP2367075 B1 EP 2367075B1 EP 10156794 A EP10156794 A EP 10156794A EP 2367075 B1 EP2367075 B1 EP 2367075B1
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EP
European Patent Office
Prior art keywords
crown
ring
elastically deformable
head
winding
Prior art date
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Application number
EP10156794.9A
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German (de)
French (fr)
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EP2367075A1 (en
Inventor
Georges Zimmermann
Pierre-Jean Bonnet
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.)
Meco SA
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Meco SA
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Publication date
Application filed by Meco SA filed Critical Meco SA
Priority to EP10156794.9A priority Critical patent/EP2367075B1/en
Priority to JP2011059391A priority patent/JP5331842B2/en
Priority to CN201110064618.0A priority patent/CN102193483B/en
Priority to US13/050,368 priority patent/US8602639B2/en
Publication of EP2367075A1 publication Critical patent/EP2367075A1/en
Priority to HK12102703.0A priority patent/HK1162692A1/en
Application granted granted Critical
Publication of EP2367075B1 publication Critical patent/EP2367075B1/en
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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
    • G04B3/00—Normal winding of clockworks by hand or mechanically; Winding up several mainsprings or driving weights simultaneously
    • G04B3/06—Keys or the like with means preventing overwinding

Definitions

  • the present invention relates to a winding crown for a timepiece. More specifically, the present invention relates to such a ring guard against any parasitic torque resistant.
  • a crown for a timepiece of the type mentioned in the preamble is known from the European patent application EP 1 586 960 in the name of the Claimant. Such a crown is shown in section at figure 1 attached to this patent application.
  • this ring has a symmetry of rotation axis X1 and is hollow so as to define a housing in which are housed the various elements of the disengaging mechanism.
  • these elements there is in particular a hollow support element 2 whose dimensions are adjusted to those of the hollow inner housing of the ring 1 and which is closed on one side by a bottom 4.
  • Each of the springs 6 is of the flat spring type. It comprises a central base 8 of general shape close to that of a square and pierced with a hole 10 also of substantially square shape centered on the general axis of symmetry X1 of the crown 1.
  • Four arms 12 elastically deformable extend from the central base 8 of each of the two springs 6.
  • the assembly is completed by a barrel 14 of generally cylindrical shape, a first end facing the center of the movement of the timepiece is intended to receive a winding stem (not shown).
  • the barrel 14 comprises a main portion 16 of cylindrical shape surmounted by a head 18 in the form of disc whose diameter is greater than the diameter of the main portion 16.
  • the head 18 is itself surmounted by a portion 20 whose transverse dimensions are smaller than those of the main part 16 and which protrudes from the surface of the head 18.
  • This projecting portion 20 is centered on the axis of symmetry X1 of the ring 1 and has a contour of square shape complementary to that of the holes 10 of the springs 6 with which this projecting portion 20 is intended to cooperate.
  • a rigid element 22 in the form of a ring or washer whose central opening has a diameter greater than the diameter of the head 18 of the barrel 14.
  • This rigid ring 22 has a plurality of notches 24 intended to cooperate with the resilient arms 12 of the springs 6. It is arranged against the bottom 4 of the hollow element 2 so that the notches 24 are located opposite the arms 12 of the springs 6.
  • An additional washer 26 is provided to support the rigid ring 22 and the barrel 14.
  • the washer 26 has an annular shoulder 28 of inside diameter greater than the diameter of the head 18 of the barrel 14 and an outside diameter substantially equal to diameter of the rigid ring 22.
  • the height of the annular shoulder 28 of the washer 26 is chosen such that it is equal to or greater than the thickness of the head 18 of the barrel 14, which allows the Shoulder 28 to play the role of spacer.
  • the washer 26 further comprises a central opening 30 whose diameter is adjusted to the diameter of the main portion 16 of the barrel 14.
  • a reduction ring 32 is mounted after each other, the outside diameter of which is substantially equal to the inside diameter of the support member 2 and an O-ring type ring seal 34 whose diameter outside at rest is substantially greater than the inside diameter of the support member 2.
  • flat washer 36 is then provided to close the inner housing of the ring 1.
  • a tube 38 is passed through the flat washer 36, the seal 34 and the reduction washer 32 and is fixed on the main part 16 of the barrel 14.
  • This tube 38 whose outer diameter is substantially greater than the diameter
  • the inside of the O-ring 34 has the function of allowing the crown 1 to be mounted on the middle part of a watch case.
  • the ring 1 On its outer surface, the ring 1 comprises a plurality of grooves for facilitating the operation of the ring 1 by the user.
  • the ring 1 delimits a hollow inner housing in which is housed the disengaging mechanism.
  • This clutch mechanism essentially comprises a rigid ring 22 having on its inner periphery a plurality of notches 24 intended to cooperate with one or more spring elements 6 of generally circular shape to perform the disengaging function.
  • the notched ring 22 is integral with the ring 1 while the spring elements 6 are fixed on the barrel 14 on which is screwed a winding stem which acts on the winding mechanism of the mainspring.
  • the resisting torque opposed by the spring elements 6 is less than a predetermined value, they are rotated by the rigid ring 22 under the effect of the actuation of the ring 1 by the user. In turn, the spring elements 6 drive the barrel 14 on which they are mounted and therefore the winding stem.
  • the resisting torque opposed by the spring elements 6 becomes greater than the predetermined value because the barrel spring is fully armed, said spring elements 6 will deform elastically in response to the actuation of the rigid ring 22 and will escape to the latter by sliding. As a result, the user-operated ring 1 will turn in a vacuum. The barrel spring is thus protected against any excessive winding which could damage it.
  • the barrel 14 has at its upper end a protruding portion 20 of shape for example square and fits in a hole, also square, made in the springs 6 by which said springs 6 are secured to said barrel 14.
  • a protruding portion 20 of shape for example square and fits in a hole, also square, made in the springs 6 by which said springs 6 are secured to said barrel 14.
  • the crown described above has presented a problem. Indeed, as can be understood from the examination of the figure 1 when pressure is exerted on the ring 1, there is nothing to prevent the spring element located highest in the stack of the spring elements 6 from bearing against the bottom 4 of the support element 2. surface contact between the spring element 6 and the bottom 4 of the support element 2 generates a parasitic torque which delays the moment when the resisting torque opposed by the spring elements 6 becomes greater than the predetermined threshold value and where said spring elements 6 will deform elastically in response to the actuation of the rigid ring 22 to escape the latter by sliding. In other words, the clutch can occur after the barrel spring is fully armed, hence serious risks of damaging the movement of the watch.
  • the patent document FR 1 571 565 describes a winding crown inside which is driven a bushing whose bottom has an axial opening for the passage of the outer portion of a tigeron.
  • the sleeve rests against a scope of the crown so as to provide a housing within which the end of the tigeron protrudes.
  • the head of a screw fixed axially to the outer end of the tigeron forms a bearing against which bears the inner edge of an annular spring.
  • the patent document EP 1 566 708 discloses a torque limiting winding device comprising a cap-shaped winding crown, provided with a bottom and a tubular portion whose outer wall is provided with splines and the inner wall of spans, the bottom and the portion tubular defining a housing.
  • a disengagement member, mounted in the housing, and a winding stem attached to the disengagement member complete the assembly.
  • the disengagement member comprises a clutch part comprising a plate disposed in the housing, between the bottom and a bearing surface of the crown, and a clutch plate.
  • a coil spring is supported against the clutch disk, so as to generate a force gripping balls between the clutch disc and the plate.
  • the patent document FR 1 506 657 discloses a winding device comprising a crown that can be locked on a pendant by a bayonet closure device.
  • the inner walls of the recess of the ring have splines for cooperating with the splines of a sleeve for driving the sleeve in rotation.
  • the sleeve is secured in rotation with the rod holder via a square fixed by a screw on the rod holder.
  • the patent WO 2007/113723 discloses a push-button for a sealed watch case comprising a locking cap screwed onto a head of an actuating screw.
  • the cap has an axial extension greater than the head of the screw so as to extend beyond the head of the screw towards the watch case.
  • a stop ring is screwed onto the locking cap near the free edge so that the stop ring abuts against the head and against the box respectively in an unlocking and locking configuration.
  • the present invention aims to remedy these problems by providing a winding crown which is free of any parasitic friction and which allows to protect the watch movement and in particular the mainspring.
  • the present invention relates to a winding crown for a timepiece according to claim 1 attached to the present patent application.
  • the present invention provides a winding crown for a timepiece in which an abutment is interposed between the bottom of the ring and the elastically deformable element. This stop prevents the elastically deformable element from coming into contact with the surface of the bottom of the ring when the ring is pressed axially towards the center of the movement of the timepiece. This avoids any parasitic torque, which makes it possible to provide a winding crown with improved operation and to effectively protect the watch movement and in particular the mainspring.
  • the contact surface between the abutment and the bottom of the ring is less than the contact area between the elastically deformable element and the same bottom, so that the parasitic torque induced by the stop is substantially less than the parasitic torque. induced by the elastic element.
  • the abutment is constituted by a tenon comprising a head partially housed in a recess formed in the bottom of the crown and protruding from the recess on a height which defines the spacing between the spring and the background of the crown.
  • the head of the tenon is of conical shape.
  • the conical shape of the tenon head also contributes to a reduction of the contact surface between this tenon and the bottom of the the protruding portion 68 is slightly greater than the thickness of the three springs 50 joined together.
  • a sleeve 70 is provided to support the notched ring 60 and the barrel 62.
  • the sleeve 70 has an annular shoulder 72 of inner diameter greater than the diameter of the head 66 of the barrel 62 and an outer diameter substantially equal to the diameter
  • the height of the annular shoulder 72 of the sleeve 70 is chosen such that it is equal to or greater than the thickness of the head 66 of the barrel 62, which allows the shoulder 28 to play the role of spacer.
  • the bushing 70 further comprises a central opening 74 whose diameter is adjusted to the diameter of a tube 76 fixed on the main portion 64 of the barrel 62 and whose function is to allow the mounting of the crown 40 on the middle part of the barrel. a watch box.
  • a first and a second circular grooves 78 and 80 are formed in the sleeve 70 and each receive an O-ring type seal respectively 82 and 84.
  • the first seal 82 seals between the skirt 44 of the ring 40 and the sleeve 70 and the second seal 84 seals between the sleeve 70 and the tube 76.
  • the pin 86 is interposed between the bottom 42 of the ring 40 and the highest spring in the stack of three springs 50 a pin 86 which acts as a shim or stop to prevent the spring 50 comes into contact with the bottom 42 of the ring 40.
  • the pin 86 comprises a head 88 partially housed in a recess 90 formed in the bottom 42 of the ring 40 and whose diameter is greater than the dimensions of the hole 54 of the spring 50.
  • the head 88 of the pin 86 protrudes from the recess 90 to a height less than or equal to the height of a shoulder 92 against which the notched ring 60 bears.
  • the head 88 of the tenon 86 is extended by a foot 94 which is guided freely in the projecting portion 68 which overcomes the head 66 of the barrel 62. It will be understood that the contact surface between the head 88 of the post 86 and the bottom 42 of the crown 40 is less than the surface of contact between the spring 56 and the same bottom 42, so that the parasitic torque induced by the pin 86 is substantially less than the parasitic torque induced by the spring 56. In addition, the conical shape of the head 88 of the pin 86 also contributes to a reduction of the contact surface between the pin 88 and the bottom 42 of the ring 40 and therefore to a limitation of the friction forces between these two parts.

Description

La présente invention concerne une couronne de remontage pour pièce d'horlogerie. Plus précisément, la présente invention concerne une telle couronne prémunie contre tout couple parasite résistant.The present invention relates to a winding crown for a timepiece. More specifically, the present invention relates to such a ring guard against any parasitic torque resistant.

Une couronne pour pièce d'horlogerie du type mentionné en préambule est connue de la demande de brevet européen EP 1 586 960 au nom de la Demanderesse. Une telle couronne est représentée en coupe à la figure 1 annexée à la présente demande de brevet. Désignée dans son ensemble par la référence numérique générale 1, cette couronne présente une symétrie de rotation d'axe X1 et est creuse de façon à définir un logement dans lequel sont logés les différents éléments du mécanisme de débrayage. Parmi ces éléments, on trouve notamment un élément de support creux 2 dont les dimensions sont ajustées à celles du logement intérieur creux de la couronne 1 et qui est fermé d'un côté par un fond 4.A crown for a timepiece of the type mentioned in the preamble is known from the European patent application EP 1 586 960 in the name of the Claimant. Such a crown is shown in section at figure 1 attached to this patent application. Designated as a whole by the general numerical reference 1, this ring has a symmetry of rotation axis X1 and is hollow so as to define a housing in which are housed the various elements of the disengaging mechanism. Among these elements, there is in particular a hollow support element 2 whose dimensions are adjusted to those of the hollow inner housing of the ring 1 and which is closed on one side by a bottom 4.

On trouve ensuite deux ressorts 6 identiques destinés à être disposés contre le fond 4 de l'élément support creux 2. Chacun des ressorts 6 est du type ressort plat. Il comprend une base centrale 8 de forme générale proche de celle d'un carré et percée d'un trou 10 également de forme sensiblement carrée centré sur l'axe général de symétrie X1 de la couronne 1. Quatre bras 12 élastiquement déformables s'étendent à partir de la base centrale 8 de chacun des deux ressorts 6.Then there are two identical springs 6 to be arranged against the bottom 4 of the hollow support member 2. Each of the springs 6 is of the flat spring type. It comprises a central base 8 of general shape close to that of a square and pierced with a hole 10 also of substantially square shape centered on the general axis of symmetry X1 of the crown 1. Four arms 12 elastically deformable extend from the central base 8 of each of the two springs 6.

Le montage est complété par un canon 14 de forme générale cylindrique dont une première extrémité dirigée vers le centre du mouvement de la pièce d'horlogerie est destinée à recevoir une tige de remontoir (non représentée). Le canon 14 comprend une partie principale 16 de forme cylindrique surmontée par une tête 18 en forme de disque dont le diamètre est supérieur au diamètre de la partie principale 16. La tête 18 est elle-même surmontée d'une portion 20 dont les dimensions transversales sont plus faibles que celles de la partie principale 16 et qui fait saillie de la surface de la tête 18. Cette portion saillante 20 est centrée sur l'axe de symétrie X1 de la couronne 1 et présente un contour de forme carrée complémentaire à celui des trous 10 des ressorts 6 avec lesquels cette portion saillante 20 est destinée à coopérer.The assembly is completed by a barrel 14 of generally cylindrical shape, a first end facing the center of the movement of the timepiece is intended to receive a winding stem (not shown). The barrel 14 comprises a main portion 16 of cylindrical shape surmounted by a head 18 in the form of disc whose diameter is greater than the diameter of the main portion 16. The head 18 is itself surmounted by a portion 20 whose transverse dimensions are smaller than those of the main part 16 and which protrudes from the surface of the head 18. This projecting portion 20 is centered on the axis of symmetry X1 of the ring 1 and has a contour of square shape complementary to that of the holes 10 of the springs 6 with which this projecting portion 20 is intended to cooperate.

Le montage se poursuit avec un élément rigide 22 en forme d'anneau ou de rondelle dont l'ouverture centrale présente un diamètre supérieur au diamètre de la tête 18 du canon 14. Cet anneau rigide 22 présente une pluralité de crans 24 destinés à coopérer avec les bras élastiques 12 des ressorts 6. Il est disposé contre le fond 4 de l'élément creux 2 de façon que les crans 24 se trouvent situés en regard des bras 12 des ressorts 6.Mounting continues with a rigid element 22 in the form of a ring or washer whose central opening has a diameter greater than the diameter of the head 18 of the barrel 14. This rigid ring 22 has a plurality of notches 24 intended to cooperate with the resilient arms 12 of the springs 6. It is arranged against the bottom 4 of the hollow element 2 so that the notches 24 are located opposite the arms 12 of the springs 6.

Une rondelle supplémentaire 26 est prévue pour supporter l'anneau rigide 22 et le canon 14. A cet effet, la rondelle 26 présente un épaulement annulaire 28 de diamètre intérieur supérieur au diamètre de la tête 18 du canon 14 et un diamètre extérieur sensiblement égal au diamètre de l'anneau rigide 22. La hauteur de l'épaulement annulaire 28 de la rondelle 26 est choisie de telle sorte qu'elle soit égale ou supérieure à l'épaisseur de la tête 18 du canon 14, ce qui permet à l'épaulement 28 de jouer le rôle d'entretoise. La rondelle 26 comprend en outre une ouverture centrale 30 dont le diamètre est ajusté sur le diamètre de la partie principale 16 du canon 14.An additional washer 26 is provided to support the rigid ring 22 and the barrel 14. For this purpose, the washer 26 has an annular shoulder 28 of inside diameter greater than the diameter of the head 18 of the barrel 14 and an outside diameter substantially equal to diameter of the rigid ring 22. The height of the annular shoulder 28 of the washer 26 is chosen such that it is equal to or greater than the thickness of the head 18 of the barrel 14, which allows the Shoulder 28 to play the role of spacer. The washer 26 further comprises a central opening 30 whose diameter is adjusted to the diameter of the main portion 16 of the barrel 14.

Les éléments restants ont uniquement pour but de fermer la couronne 1 afin d'en assurer l'étanchéité et ne jouent aucun rôle dans le mécanisme de débrayage décrit ci-dessus. Dans ce but, on monte à la suite l'un de l'autre une rondelle de réduction 32 dont le diamètre extérieur est sensiblement égal au diamètre intérieur de l'élément support 2 et un joint annulaire 34 de type O-ring dont le diamètre extérieur au repos est sensiblement supérieur au diamètre intérieur de l'élément support 2. Une rondelle plate 36 est ensuite prévue pour fermer le logement intérieur de la couronne 1.The remaining elements are only intended to close the ring 1 to seal and play no role in the release mechanism described above. For this purpose, a reduction ring 32 is mounted after each other, the outside diameter of which is substantially equal to the inside diameter of the support member 2 and an O-ring type ring seal 34 whose diameter outside at rest is substantially greater than the inside diameter of the support member 2. flat washer 36 is then provided to close the inner housing of the ring 1.

Finalement, un tube 38 est passé à travers la rondelle plate 36, le joint d'étanchéité 34 et la rondelle de réduction 32 et est fixé sur la partie principale 16 du canon 14. Ce tube 38 dont le diamètre extérieur est sensiblement supérieur au diamètre intérieur du joint O-ring 34 a pour fonction de permettre le montage de la couronne 1 sur la carrure d'une boîte de montre.Finally, a tube 38 is passed through the flat washer 36, the seal 34 and the reduction washer 32 and is fixed on the main part 16 of the barrel 14. This tube 38 whose outer diameter is substantially greater than the diameter The inside of the O-ring 34 has the function of allowing the crown 1 to be mounted on the middle part of a watch case.

Sur sa surface externe, la couronne 1 comprend une pluralité de cannelures destinées à faciliter la manoeuvre de la couronne 1 par l'utilisateur. Comme on l'aura compris de ce qui précède, la couronne 1 délimite un logement intérieur creux dans lequel est logé le mécanisme de débrayage. Ce mécanisme de débrayage comprend essentiellement un anneau rigide 22 présentant sur sa périphérie intérieure une pluralité de crans 24 destinés à coopérer avec un ou plusieurs éléments ressorts 6 de forme générale circulaire pour réaliser la fonction de débrayage. En effet, l'anneau cranté 22 est solidaire de la couronne 1 tandis que les éléments ressorts 6 sont fixés sur le canon 14 sur lequel est vissée une tige de remontoir qui agit sur le mécanisme d'armage du ressort de barillet. Aussi longtemps que le couple résistant opposé par les éléments ressorts 6 est inférieur à une valeur prédéterminée, ceux-ci sont entraînés en rotation par l'anneau rigide 22 sous l'effet de l'actionnement de la couronne 1 par l'utilisateur. A leur tour, les éléments ressorts 6 entraînent le canon 14 sur lequel ils sont montés et donc la tige de remontoir. Lorsque le couple résistant opposé par les éléments ressorts 6 devient supérieur à la valeur prédéterminée du fait que le ressort de barillet est complètement armé, lesdits éléments ressorts 6 vont se déformer élastiquement en réponse à l'actionnement de l'anneau rigide 22 et vont échapper à ce dernier par glissement. Ceci a pour résultat que la couronne 1 actionnée par l'utilisateur va tourner dans le vide. Le ressort de barillet est ainsi protégé contre tout remontage excessif qui pourrait l'endommager.On its outer surface, the ring 1 comprises a plurality of grooves for facilitating the operation of the ring 1 by the user. As will be understood from the above, the ring 1 delimits a hollow inner housing in which is housed the disengaging mechanism. This clutch mechanism essentially comprises a rigid ring 22 having on its inner periphery a plurality of notches 24 intended to cooperate with one or more spring elements 6 of generally circular shape to perform the disengaging function. Indeed, the notched ring 22 is integral with the ring 1 while the spring elements 6 are fixed on the barrel 14 on which is screwed a winding stem which acts on the winding mechanism of the mainspring. As long as the resisting torque opposed by the spring elements 6 is less than a predetermined value, they are rotated by the rigid ring 22 under the effect of the actuation of the ring 1 by the user. In turn, the spring elements 6 drive the barrel 14 on which they are mounted and therefore the winding stem. When the resisting torque opposed by the spring elements 6 becomes greater than the predetermined value because the barrel spring is fully armed, said spring elements 6 will deform elastically in response to the actuation of the rigid ring 22 and will escape to the latter by sliding. As a result, the user-operated ring 1 will turn in a vacuum. The barrel spring is thus protected against any excessive winding which could damage it.

Le canon 14 présente à son extrémité supérieure une portion saillante 20 de forme par exemple carrée et s'inscrit dans un trou, également carré, pratiqué dans les ressorts 6 par lequel lesdits ressorts 6 sont rendus solidaires dudit canon 14. Ainsi, lorsqu'un mouvement de rotation est imprimé aux ressorts 6, ceux-ci entraînent à leur tour le canon 14 en rotation via sa partie en saillie 20.The barrel 14 has at its upper end a protruding portion 20 of shape for example square and fits in a hole, also square, made in the springs 6 by which said springs 6 are secured to said barrel 14. Thus, when Rotational movement is printed on the springs 6, which in turn drive the barrel 14 in rotation via its protruding part 20.

A l'usage, la couronne décrite ci-dessus a présenté un problème. En effet, comme on peut le comprendre à l'examen de la figure 1, lorsqu'on exerce une pression sur la couronne 1, rien n'empêche que l'élément ressort situé le plus haut dans l'empilement des éléments ressorts 6 vienne en appui contre le fond 4 de l'élément support 2. Or, ce contact de surface entre l'élément ressort 6 et le fond 4 de l'élément support 2 engendre un couple parasite qui retarde le moment où le couple résistant opposé par les éléments ressorts 6 devient supérieur à la valeur seuil prédéterminée et où lesdits éléments ressorts 6 vont se déformer élastiquement en réponse à l'actionnement de l'anneau rigide 22 pour échapper à ce dernier par glissement. Autrement dit, le débrayage peut se produire après que le ressort de barillet soit complètement armé, d'où des risques sérieux d'abîmer le mouvement de la montre.In use, the crown described above has presented a problem. Indeed, as can be understood from the examination of the figure 1 when pressure is exerted on the ring 1, there is nothing to prevent the spring element located highest in the stack of the spring elements 6 from bearing against the bottom 4 of the support element 2. surface contact between the spring element 6 and the bottom 4 of the support element 2 generates a parasitic torque which delays the moment when the resisting torque opposed by the spring elements 6 becomes greater than the predetermined threshold value and where said spring elements 6 will deform elastically in response to the actuation of the rigid ring 22 to escape the latter by sliding. In other words, the clutch can occur after the barrel spring is fully armed, hence serious risks of damaging the movement of the watch.

On peut également envisager le cas d'une couronne dans le volume intérieur de laquelle est logé un élément ressort hélicoïdal en appui contre le fond de la couronne. Lorsqu'on appuie sur une telle couronne et qu'on la tourne, les contacts entre l'élément ressort et le fond de la couronne engendrent des forces de frottement qui peuvent être perçues par l'utilisateur et donner à celui-ci le sentiment d'un mécanisme de moindre qualité.One can also consider the case of a crown in the interior of which is housed a helical spring element bearing against the bottom of the crown. When such a ring is pressed and turned, the contacts between the spring element and the bottom of the ring generate friction forces which can be perceived by the user and give the user the feeling of 'a mechanism of lower quality.

Le document de brevet FR 1 571 565 décrit une couronne de remontoir à l'intérieur de laquelle est chassée une douille dont le fond présente une ouverture axiale pour le passage du tronçon extérieur d'un tigeron. La douille repose contre une portée de la couronne de manière à ménager un logement à l'intérieur duquel l'extrémité du tigeron fait saillie. La tête d'une vis fixée axialement à l'extrémité extérieure du tigeron forme une portée contre laquelle appuie le bord intérieur d'un ressort annulaire.The patent document FR 1 571 565 describes a winding crown inside which is driven a bushing whose bottom has an axial opening for the passage of the outer portion of a tigeron. The sleeve rests against a scope of the crown so as to provide a housing within which the end of the tigeron protrudes. The head of a screw fixed axially to the outer end of the tigeron forms a bearing against which bears the inner edge of an annular spring.

Le document de brevet EP 1 566 708 décrit un dispositif de remontoir à limitation de couple comprenant une couronne de remontoir en forme de coiffe, munie d'un fond et d'une portion tubulaire dont la paroi extérieure est munie de cannelures et la paroi intérieure de portées, le fond et la portion tubulaire définissant un logement. Un organe de débrayage, monté dans le logement, et une tige de remontoir fixée à l'organe de débrayage complètent l'ensemble. L'organe de débrayage comprend une pièce d'embrayage comportant une assiette disposée dans le logement, entre le fond et une portée de la couronne, ainsi qu'un disque d'embrayage. Un ressort à boudins est en appui contre le disque d'embrayage, de manière à engendrer une force enserrant des billes entre le disque d'embrayage et l'assiette.The patent document EP 1 566 708 discloses a torque limiting winding device comprising a cap-shaped winding crown, provided with a bottom and a tubular portion whose outer wall is provided with splines and the inner wall of spans, the bottom and the portion tubular defining a housing. A disengagement member, mounted in the housing, and a winding stem attached to the disengagement member complete the assembly. The disengagement member comprises a clutch part comprising a plate disposed in the housing, between the bottom and a bearing surface of the crown, and a clutch plate. A coil spring is supported against the clutch disk, so as to generate a force gripping balls between the clutch disc and the plate.

Le document de brevet FR 1 506 657 décrit un dispositif de remontoir étanche comprenant une couronne pouvant être verrouillée sur un pendant par un dispositif de fermeture à baïonnette. Les parois intérieures de la creusure de la couronne présentent des cannelures destinées à coopérer avec les cannelures d'une douille pour entraîner cette douille en rotation. La douille est solidaire en rotation du porte-tige par l'intermédiaire d'un carré fixé par une vis sur le porte-tige.The patent document FR 1 506 657 discloses a winding device comprising a crown that can be locked on a pendant by a bayonet closure device. The inner walls of the recess of the ring have splines for cooperating with the splines of a sleeve for driving the sleeve in rotation. The sleeve is secured in rotation with the rod holder via a square fixed by a screw on the rod holder.

Le brevet WO 2007/113723 décrit un bouton-poussoir pour une boîte de montre étanche comprenant une coiffe de verrouillage vissée sur une tête d'une vis d'actionnement. La coiffe présente une extension axiale plus importante que la tête de la vis de façon à s'étendre au-delà de la tête de la vis en direction de la boîte de montre. Un anneau de butée est vissé sur la coiffe de verrouillage près du rebord libre de façon que l'anneau de butée butte respectivement contre la tête et contre la boîte dans une configuration de déverrouillage et de verrouillage.The patent WO 2007/113723 discloses a push-button for a sealed watch case comprising a locking cap screwed onto a head of an actuating screw. The cap has an axial extension greater than the head of the screw so as to extend beyond the head of the screw towards the watch case. A stop ring is screwed onto the locking cap near the free edge so that the stop ring abuts against the head and against the box respectively in an unlocking and locking configuration.

La présente invention a pour but de remédier à ces problèmes en procurant une couronne de remontage qui soit exempte de tout frottement parasite et qui permette de protéger le mouvement d'horlogerie et en particulier le ressort de barillet.The present invention aims to remedy these problems by providing a winding crown which is free of any parasitic friction and which allows to protect the watch movement and in particular the mainspring.

A cet effet, la présente invention concerne une couronne de remontage pour pièce d'horlogerie selon la revendication 1 annexée à la présente demande de brevet.For this purpose, the present invention relates to a winding crown for a timepiece according to claim 1 attached to the present patent application.

Grâce à ces caractéristiques, la présente invention procure une couronne de remontage pour pièce d'horlogerie dans laquelle une butée est intercalée entre le fond de la couronne et l'élément élastiquement déformable. Cette butée empêche l'élément élastiquement déformable de venir en contact avec la surface du fond de la couronne lorsque la couronne est pressée axialement en direction du centre du mouvement de la pièce d'horlogerie. On évite ainsi tout couple parasite, ce qui permet de procurer une couronne de remontage au fonctionnement amélioré et de protéger efficacement le mouvement d'horlogerie et en particulier le ressort de barillet.Thanks to these features, the present invention provides a winding crown for a timepiece in which an abutment is interposed between the bottom of the ring and the elastically deformable element. This stop prevents the elastically deformable element from coming into contact with the surface of the bottom of the ring when the ring is pressed axially towards the center of the movement of the timepiece. This avoids any parasitic torque, which makes it possible to provide a winding crown with improved operation and to effectively protect the watch movement and in particular the mainspring.

On comprendra que la surface de contact entre la butée et le fond de la couronne est inférieure à la surface de contact entre l'élément élastiquement déformable et ce même fond, de sorte que le couple parasite induit par la butée est sensiblement inférieur au couple parasite induit par l'élément élastique.It will be understood that the contact surface between the abutment and the bottom of the ring is less than the contact area between the elastically deformable element and the same bottom, so that the parasitic torque induced by the stop is substantially less than the parasitic torque. induced by the elastic element.

Selon une caractéristique complémentaire de l'invention, la butée est constituée par un tenon comprenant une tête partiellement logée dans une creusure pratiquée dans le fond de la couronne et faisant saillie de la creusure sur une hauteur qui définit l'espacement entre le ressort et le fond de la couronne.According to a complementary feature of the invention, the abutment is constituted by a tenon comprising a head partially housed in a recess formed in the bottom of the crown and protruding from the recess on a height which defines the spacing between the spring and the background of the crown.

Selon une autre caractéristique de l'invention, la tête du tenon est de forme conique. La forme conique de la tête du tenon contribue également à une réduction de la surface de contact entre ce tenon et le fond de la la portion saillante 68 est légèrement supérieure à l'épaisseur des trois ressorts 50 réunis.According to another characteristic of the invention, the head of the tenon is of conical shape. The conical shape of the tenon head also contributes to a reduction of the contact surface between this tenon and the bottom of the the protruding portion 68 is slightly greater than the thickness of the three springs 50 joined together.

Une douille 70 est prévue pour supporter l'anneau cranté 60 et le canon 62. A cet effet, la douille 70 présente un épaulement annulaire 72 de diamètre intérieur supérieur au diamètre de la tête 66 du canon 62 et un diamètre extérieur sensiblement égal au diamètre de l'anneau cranté 60. La hauteur de l'épaulement annulaire 72 de la douille 70 est choisie de telle sorte qu'elle soit égale ou supérieure à l'épaisseur de la tête 66 du canon 62, ce qui permet à l'épaulement 28 de jouer le rôle d'entretoise. La douille 70 comprend en outre une ouverture centrale 74 dont le diamètre est ajusté sur le diamètre d'un tube 76 fixé sur la partie principale 64 du canon 62 et qui a pour fonction de permettre le montage de la couronne 40 sur la carrure d'une boîte de montre.A sleeve 70 is provided to support the notched ring 60 and the barrel 62. For this purpose, the sleeve 70 has an annular shoulder 72 of inner diameter greater than the diameter of the head 66 of the barrel 62 and an outer diameter substantially equal to the diameter The height of the annular shoulder 72 of the sleeve 70 is chosen such that it is equal to or greater than the thickness of the head 66 of the barrel 62, which allows the shoulder 28 to play the role of spacer. The bushing 70 further comprises a central opening 74 whose diameter is adjusted to the diameter of a tube 76 fixed on the main portion 64 of the barrel 62 and whose function is to allow the mounting of the crown 40 on the middle part of the barrel. a watch box.

Enfin, une première et une seconde gorges circulaires 78 et 80 sont pratiquées dans la douille 70 et reçoivent chacune un joint d'étanchéité de type O-ring respectivement 82 et 84. Le premier joint 82 assure l'étanchéité entre la jupe 44 de la couronne 40 et la douille 70 et le second joint 84 assure l'étanchéité entre la douille 70 et le tube 76.Finally, a first and a second circular grooves 78 and 80 are formed in the sleeve 70 and each receive an O-ring type seal respectively 82 and 84. The first seal 82 seals between the skirt 44 of the ring 40 and the sleeve 70 and the second seal 84 seals between the sleeve 70 and the tube 76.

Conformément à l'invention, on intercale entre le fond 42 de la couronne 40 et le ressort le plus haut dans l'empilement des trois ressorts 50 un tenon 86 qui joue le rôle d'une cale d'épaisseur ou de butée visant à empêcher le ressort 50 de venir en contact avec le fond 42 de la couronne 40. A cet effet, le tenon 86 comprend une tête 88 partiellement logée dans une creusure 90 pratiquée dans le fond 42 de la couronne 40 et dont le diamètre est supérieur aux dimensions du trou 54 du ressort 50. La tête 88 du tenon 86 fait saillie de la creusure 90 sur une hauteur inférieure ou égale à la hauteur d'un épaulement 92 contre lequel l'anneau cranté 60 vient en appui. La tête 88 du tenon 86 est prolongée par un pied 94 qui est guidé librement dans la portion saillante 68 qui surmonte la tête 66 du canon 62. On comprendra que la surface de contact entre la tête 88 du tenon 86 et le fond 42 de la couronne 40 est inférieure à la surface de contact entre le ressort 56 et ce même fond 42, de sorte que le couple parasite induit par le tenon 86 est sensiblement inférieur au couple parasite induit par le ressort 56. De plus, la forme conique de la tête 88 du tenon 86 contribue également à une réduction de la surface de contact entre ce tenon 88 et le fond 42 de la couronne 40 et par conséquent à une limitation des forces de frottement entre ces deux pièces.According to the invention, is interposed between the bottom 42 of the ring 40 and the highest spring in the stack of three springs 50 a pin 86 which acts as a shim or stop to prevent the spring 50 comes into contact with the bottom 42 of the ring 40. For this purpose, the pin 86 comprises a head 88 partially housed in a recess 90 formed in the bottom 42 of the ring 40 and whose diameter is greater than the dimensions of the hole 54 of the spring 50. The head 88 of the pin 86 protrudes from the recess 90 to a height less than or equal to the height of a shoulder 92 against which the notched ring 60 bears. The head 88 of the tenon 86 is extended by a foot 94 which is guided freely in the projecting portion 68 which overcomes the head 66 of the barrel 62. It will be understood that the contact surface between the head 88 of the post 86 and the bottom 42 of the crown 40 is less than the surface of contact between the spring 56 and the same bottom 42, so that the parasitic torque induced by the pin 86 is substantially less than the parasitic torque induced by the spring 56. In addition, the conical shape of the head 88 of the pin 86 also contributes to a reduction of the contact surface between the pin 88 and the bottom 42 of the ring 40 and therefore to a limitation of the friction forces between these two parts.

Il va de soi que la présente invention n'est pas limitée au mode de réalisation qui vient d'être décrit et que diverses modifications et variantes simples peuvent être envisagées par l'homme du métier sans sortir du cadre de l'invention tel que défini par les revendications annexées. En particulier, on notera que dans les modes de réalisation décrits dans les demandes de brevet européen EP 2 058 713 et EP 2 058 714 au nom de la Demanderesse, le ressort le plus haut dans l'empilement de ressorts est en appui selon une surface annulaire contre un épaulement prévu dans le volume intérieur de la couronne. Cet appui selon une surface annulaire restreinte ne génère pas de couple susceptible de perturber de manière significative le fonctionnement du mécanisme de débrayage logé dans la couronne. On peut également envisager le cas d'une couronne dans le volume intérieur de laquelle est logé un élément ressort hélicoïdal en appui contre le fond de la couronne. Lorsqu'on appuie sur une telle couronne et qu'on la tourne, les contacts entre l'élément ressort et le fond de la couronne engendrent des forces de frottement qui peuvent être perçues par l'utilisateur et donner à celui-ci le sentiment d'un mécanisme de moindre qualité.It goes without saying that the present invention is not limited to the embodiment which has just been described and that various modifications and simple variants can be envisaged by those skilled in the art without departing from the scope of the invention as defined by the appended claims. In particular, it will be noted that in the embodiments described in the European patent applications EP 2,058,713 and EP 2,058,714 in the name of the Applicant, the highest spring in the stack of springs bears against an annular surface against a shoulder provided in the inner volume of the crown. This support along a restricted annular surface does not generate torque that could significantly disturb the operation of the clutch mechanism housed in the crown. One can also consider the case of a crown in the interior of which is housed a helical spring element bearing against the bottom of the crown. When such a ring is pressed and turned, the contacts between the spring element and the bottom of the ring generate friction forces which can be perceived by the user and give the user the feeling of 'a mechanism of lower quality.

Claims (5)

  1. Winding crown for a timepiece, said crown (40) including a bottom (42) and a skirt (44), which delimits an inner volume housing at least one elastically deformable element, a stop member inserted between the elastically deformable element (50) and the bottom (42) of the crown (40) being provided to prevent any surface contact between said elastically deformable element (50) and said bottom (42), the crown (40) being characterized in that the stop member is formed by a stud (86) including a head (88) partially housed inside a recess (90) made in the bottom (42) of the crown (40) and projecting from the recess (90) at a height that defines a space with the bottom (42) of the crown (40) and which is less than a space between the elastically deformable element (50) and the bottom (42) of the crown (40).
  2. Crown according to claim 1, characterized in that it is provided with a disconnecting mechanism (46) including a rigid drive ring (60) integral with the crown (40) and cooperating with the elastically deformable element (50), said elastic element (50) being integral with a pipe (62), a first end of which, pointing towards the centre of the timepiece movement, is intended to receive a winding stem, the rigid ring (60) driving the elastically deformable element (50) in at least one direction of rotation until the resisting torque provided by the elastic element (50) exceeds a threshold value beyond which said elastic element (50) deforms so as to interrupt the drive connection with the rigid ring, the elastically deformable element (50) having, for this purpose, means for temporary coupling to said rigid drive ring.
  3. Winding crown according to any of claims 1 or 2, characterized in that the head (88) of the stud (86) is conical.
  4. Winding crown according to any of claims 1 to 3, characterized in that the head (88) of the stud (86) is extended by a foot (94).
  5. Winding crown according to claim 4, characterized in that the foot (94) of the stud (86) is freely guided inside a projecting portion (68) that is mounted on a head (66) of the pipe (62).
EP10156794.9A 2010-03-17 2010-03-17 Winding crown for a clock piece Active EP2367075B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP10156794.9A EP2367075B1 (en) 2010-03-17 2010-03-17 Winding crown for a clock piece
JP2011059391A JP5331842B2 (en) 2010-03-17 2011-03-17 Crown for watches
CN201110064618.0A CN102193483B (en) 2010-03-17 2011-03-17 Winding crown for a clock piece
US13/050,368 US8602639B2 (en) 2010-03-17 2011-03-17 Winding crown for a timepiece
HK12102703.0A HK1162692A1 (en) 2010-03-17 2012-03-19 Winding crown for a timepiece

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10156794.9A EP2367075B1 (en) 2010-03-17 2010-03-17 Winding crown for a clock piece

Publications (2)

Publication Number Publication Date
EP2367075A1 EP2367075A1 (en) 2011-09-21
EP2367075B1 true EP2367075B1 (en) 2017-07-26

Family

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Application Number Title Priority Date Filing Date
EP10156794.9A Active EP2367075B1 (en) 2010-03-17 2010-03-17 Winding crown for a clock piece

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US (1) US8602639B2 (en)
EP (1) EP2367075B1 (en)
JP (1) JP5331842B2 (en)
CN (1) CN102193483B (en)
HK (1) HK1162692A1 (en)

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Publication number Priority date Publication date Assignee Title
JP5931294B2 (en) * 2012-11-02 2016-06-08 オメガ・エス アー Device for adjusting the orientation of screw-in elements of timers
JP6367059B2 (en) * 2014-09-09 2018-08-01 セイコーインスツル株式会社 clock
EP3805869A1 (en) * 2019-10-09 2021-04-14 Meco S.A. Threaded crown
EP3825777B1 (en) * 2019-11-21 2024-04-24 Meco S.A. Watch corrector and watch case
EP3828641B1 (en) * 2019-11-29 2022-07-20 Meco S.A. Push-crown for a timepiece

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EP1586960A1 (en) * 2004-04-14 2005-10-19 Meco S.A. Crown for a watch with a disconnecting mechanism
EP2058713A1 (en) * 2007-11-08 2009-05-13 Meco S.A. Crown for a timepiece
EP2058714A1 (en) * 2007-11-08 2009-05-13 Meco S.A. Crown for a timepiece comprising a disengaging mechanism

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US951672A (en) * 1909-12-14 1910-03-08 Henry Axtell Crown for winding-stems of watches.
US2268749A (en) * 1940-02-14 1942-01-06 Charles B Greenberg Watch stem bushing
US2637987A (en) * 1947-02-18 1953-05-12 Hil Jon Safety Crown Corp Overload release coupling
US2497935A (en) * 1947-07-11 1950-02-21 Feurer Bros Inc Dust-tight watch crown
CH470704A (en) * 1965-07-14 1969-05-14 Piquerez Sa Ervin Watch comprising a rotating crown, mounted under the glass
CH472721A (en) * 1966-06-14 1969-06-30 Boninchi Sa Waterproof control device for a timepiece mechanism housed in a case
CH918367A4 (en) * 1967-06-28 1971-02-26
CH691935A5 (en) * 1997-06-11 2001-11-30 Meco Sa Grenchen Safety valve for a watch.
CH697270B1 (en) * 2004-01-28 2008-07-31 Richemont Int Sa A winder.
ITFI20060083A1 (en) * 2006-03-30 2007-09-30 Anonimo S P A HERMETIC BUTTON FOR WATCH CASE
JP5044374B2 (en) * 2007-11-26 2012-10-10 セイコーインスツル株式会社 Cell phone clock

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
EP1586960A1 (en) * 2004-04-14 2005-10-19 Meco S.A. Crown for a watch with a disconnecting mechanism
EP2058713A1 (en) * 2007-11-08 2009-05-13 Meco S.A. Crown for a timepiece
EP2058714A1 (en) * 2007-11-08 2009-05-13 Meco S.A. Crown for a timepiece comprising a disengaging mechanism

Also Published As

Publication number Publication date
JP5331842B2 (en) 2013-10-30
HK1162692A1 (en) 2012-08-31
US20110228646A1 (en) 2011-09-22
US8602639B2 (en) 2013-12-10
CN102193483B (en) 2014-08-13
CN102193483A (en) 2011-09-21
JP2011197003A (en) 2011-10-06
EP2367075A1 (en) 2011-09-21

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