EP0655664A1 - Winding-button with push-piece for a timepiece - Google Patents

Winding-button with push-piece for a timepiece Download PDF

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Publication number
EP0655664A1
EP0655664A1 EP94118080A EP94118080A EP0655664A1 EP 0655664 A1 EP0655664 A1 EP 0655664A1 EP 94118080 A EP94118080 A EP 94118080A EP 94118080 A EP94118080 A EP 94118080A EP 0655664 A1 EP0655664 A1 EP 0655664A1
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EP
European Patent Office
Prior art keywords
push
head
button
spring
shoulder
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.)
Granted
Application number
EP94118080A
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German (de)
French (fr)
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EP0655664B1 (en
Inventor
Marc-André Miche
Gérard Palix
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.)
Swatch Group Management Services AG
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SMH Management Services AG
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Publication date
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Publication of EP0655664A1 publication Critical patent/EP0655664A1/en
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Publication of EP0655664B1 publication Critical patent/EP0655664B1/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
    • G04B27/00—Mechanical devices for setting the time indicating means
    • 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
    • G04B3/04—Rigidly-mounted keys, knobs or crowns
    • G04B3/048—Operation exclusively by axial movement of a push-button, e.g. for chronographs
    • 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
    • G04B37/00—Cases
    • G04B37/08—Hermetic sealing of openings, joints, passages or slits
    • G04B37/10—Hermetic sealing of openings, joints, passages or slits of winding stems
    • G04B37/106—Hermetic sealing of openings, joints, passages or slits of winding stems of push buttons

Definitions

  • the present invention relates to a push-button crown suitable for a timepiece, and in particular for high reliability watches.
  • the first two positions correspond to the positions that can be taken by a conventional crown.
  • the third position (position "-1") is known in 'multi-mode' watches, generally in watches with a first analog display indicating the time and a second display, often digital with liquid crystal, indicating one or more other watch functions such as a second hour or a wake-up time, etc.
  • the desired mode can be activated.
  • These push-button crowns are fixed to the movement rod so that when the axial or radial position of the push-button crown is changed, the rod is moved axially or radially.
  • the push crown in the "0" rest position, the push crown is rigidly connected longitudinally to the rod and can be pulled or pushed.
  • the pulled out position (position "1") the push-button crown is also rigidly linked to the rod in order to transmit angular information to the movement, such as for example setting the time by means of this rod.
  • this construction is generally known for simple push crowns, that is to say the push crowns having only two positions, the first (which corresponds to position "0") where the rod is free and a second position (which corresponds to position "-1") where the rod is engaged with the movement, allowing for example the time setting.
  • a push-button crown is described in the document CH 577 701.
  • the push-button crown is also provided with a spring whose advantage is to compensate for a misalignment between itself and the movement.
  • This pusher ring does not have the third position (position "1") and is of a relatively simple construction.
  • the present invention thus aims to remedy these defects while providing a push-button crown which has the seal suitable for high reliability watches.
  • the spring undergoes, in its stable position, a strong precompression so that, after having been brought from its stable position to its fleeting position, it returns completely to its stable position as soon as it is loose, even if the friction due to the seal between the tube and the crown is high.
  • the invention also relates to a timepiece characterized in that it comprises a push-button crown as defined above.
  • Figure 1 shows an embodiment of the pusher ring according to the invention in its rest position, called position "0".
  • the push-button crown 1 is mounted on a middle part C of a watch, preferably high-end, middle part C in the lateral edge of which is mounted a mounting tube T.
  • the latter has a flange annular R defining a radial shoulder E1 bearing on a complementary shoulder E2 formed at the mouth of a radial passage P pierced in the edge of the middle part C.
  • a seal J preferably in silver is interposed between the shoulders E1 and E2 .
  • the tube T also has, near its free end another radial shoulder E3 whose purpose will appear later.
  • the tube T is used, in the usual way for the passage of a winding rod TR which can here occupy three positions defined by the movement (not shown) of the watch to which the middle part C.
  • the three positions of the stem are a neutral position or "0" (figure 1), a drawn position called “+1” (figure 2) in which it allows the time setting of the watch, and a fugitive pushed position called “-1" (FIG. 3) in which it makes it possible to control one or more other functions of the watch, for example by closing an electrical contact (not shown) provided inside the movement.
  • the rod also has a usual thread at its free end in order to allow a push-button crown to be made integral therewith.
  • the push-button crown 1 comprises a hollow head 2, the bottom of which has a projection 3 provided with a blind hole 4.
  • the latter is internally threaded to allow the crown to be screwed onto the end of the rod TR.
  • the inner wall of the head 2 has a radial shoulder 5.
  • this internal wall has an annular groove 6 with a rounded bottom.
  • the head 2 also has an annular groove 7 which is here of rectangular profile.
  • a return spring 8 of helical shape is disposed axially in the hollow head 2 and surrounds the projection 3.
  • This spring is supported by its inner end on the bottom of the head 2, while its opposite end is supported on a ring stop 9 which surrounds the outer end of the tube T beyond the shoulder E3.
  • This ring 9 has an internal flange 10 defining a radial shoulder 11 intended to come into contact with the shoulder E3 of the tube T under the action of the spring 8, at least in the configuration of the push-button crown 1 shown in the figure 1.
  • the stop ring 9 has a beveled annular face 12 which is intended to come to bear against a circlip 13 placed in the annular groove 6 of the head 2.
  • the ring 9 is in abutment against the circlip 13 in the positions " 0 "and” +1 "of the push-button crown 1.
  • the push-button crown according to the invention also comprises a seal made of two rings 14 and 15 of rectangular section and trapped between, on the one hand, a washer 16 bearing against the circlip 13 and, on the other hand , a washer 17 which is in fact a circlip engaged in the groove 7 of the head 2.
  • the spring 8 is in a state of precompression while being trapped between the bottom of the head 2 and the shoulder 11.
  • it generates an axial force in extension incapable of defeating the forces which maintain the rod TR in its neutral position, forces which are conventionally imposed on this rod by the time-setting mechanism (not shown) of the movement of the watch fitted with the push-button crown according to the invention.
  • the precompression can be equal, for example, to 60% of the total clamping force of the spring 8, when all of its turns are clamped against each other.
  • the push-button crown according to the invention is intended more particularly to ensure an irreproachable return stroke of the rod TR from its fleeting position "-1" towards its neutral position "0", and this despite the friction forces which can be exerted on this rod by the seal which surrounds it.
  • the push-button crown 1 can move on either side of its position "0" over a distance which is preferably the same.
  • its axial stroke is the same around this "0" position.
  • this stroke is, for example, 0.35 mm, the distance separating the face of the head 2 facing the middle, and the lateral face of the latter being respectively 0.50 mm , 0.85 mm and 0.15 mm depending on whether the push-button crown is in its "0", "+1" and "-1" positions.
  • these dimensions essentially depend on the construction of the movement at which the push-button crown is associated and they can therefore vary from one type of movement to another.
  • the driving stroke towards the fugitive position "-1" is limited by the shoulder 5 of the head 2.
  • the shoulder 5 comes into contact with the stop ring 9 , the spring 8 is compressed so as to provide a return force which is very close to its maximum compression force (Fmax in FIG. 4). It is possible, according to a variant not shown in the figures, to omit the shoulder 5, whereby the end of the driving stroke will be defined by the total compression of the spring 8, all of its turns then being pressed one on the other. others.
  • the precompression force F o can be chosen according to the needs. For example, in the case of the use of a push-button crown according to the invention in watches for divers, it is important that the water pressure cannot push the push-button crown. We must then choose this precompression according to the depth that can be reached with the watch. We understand that it is necessary push the push crown relatively hard to reach position "-1" for waterproof watches at a very great depth. In such a case, the precompression F o can be equal to more than 70% of the maximum compression force F max

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)

Abstract

Winding-button (1) mounted on a guide tube (T) fixed in a casing (C) housing a timepiece, and solid, both in rotation and axially, with a control shaft (TR) which can occupy at least two axial positions, a first ("0") of which is stable and a second ("-1") of which is fleeting, comprising - a head (2) solid with the said shaft and mounted so as to be able to move axially on the said tube (T), and - a restoring spring (8) bearing via one end on the said head (2) so as to draw it towards the said stable position, where - the said spring (8) also bears via its other end on an annular stop (9) which can move in said head (2) between the said stable position, in which the said stop (9) bears on a shoulder (13) inside the said head (2) and the said fleeting position, in which the stop (9) rests on a shoulder (E3) of the said tube (T). <IMAGE>

Description

La présente invention concerne une couronne-poussoir convenant pour une pièce d'horlogerie, et notamment pour les montres de haute fiabilité.The present invention relates to a push-button crown suitable for a timepiece, and in particular for high reliability watches.

Une couronne-poussoir peut prendre trois positions différentes :

  • la position de repos (position "0") dans laquelle la montre marche normalement,
  • la position tirée (position "1") dans laquelle on peut régler l'heure de la montre avec la couronne-poussoir qui est liée fixement à la tige, et
  • la position poussée (position "-1") dans laquelle la couronne-poussoir ferme brièvement un contact électrique dans la montre.
A push crown can take three different positions:
  • the rest position (position "0") in which the watch operates normally,
  • the pulled position (position "1") in which the time of the watch can be adjusted with the push-button crown which is fixedly linked to the stem, and
  • the pushed position (position "-1") in which the push-button crown briefly closes an electrical contact in the watch.

Les deux premières positions (positions "0" et "1") correspondent aux positions pouvant être prises par une couronne classique.The first two positions (positions "0" and "1") correspond to the positions that can be taken by a conventional crown.

La troisième position (position "-1") est connue dans les montres 'multi-mode', en général dans les montres avec un premier affichage analogique indiquant l'heure et un deuxième affichage, souvent numérique aux cristaux liquides, indiquant une ou plusieurs autres fonctions de la montre telle qu'une deuxième heure ou l'heure de réveil, etc. Ainsi, en actionnant la couronne-poussoir, on peut activer le mode désiré. Ces couronnes-poussoirs sont fixées à la tige des mouvements de telle façon que lorsqu'on change la position axiale ou radiale de la couronne-poussoir, on déplace axialement ou radialement la tige. En effet, en position "0" de repos, la couronne-poussoir est liée de façon rigide longitudinalement à la tige et peut être tirée ou poussée. En position tirée, (position "1") la couronne-poussoir est également liée rigidement à la tige afin de transmettre des informations angulaires au mouvement, comme par exemple la mise à l'heure au moyen de cette tige.The third position (position "-1") is known in 'multi-mode' watches, generally in watches with a first analog display indicating the time and a second display, often digital with liquid crystal, indicating one or more other watch functions such as a second hour or a wake-up time, etc. Thus, by actuating the push-button crown, the desired mode can be activated. These push-button crowns are fixed to the movement rod so that when the axial or radial position of the push-button crown is changed, the rod is moved axially or radially. In fact, in the "0" rest position, the push crown is rigidly connected longitudinally to the rod and can be pulled or pushed. In the pulled out position (position "1") the push-button crown is also rigidly linked to the rod in order to transmit angular information to the movement, such as for example setting the time by means of this rod.

On comprend qu'il est impératif que la couronne-poussoir et la tige reviennent dans la position initiale, parce que si elles restent calées dans la position poussée, ou si elles ne reviennent pas exactement à la position initiale, la montre reste bloquée dans le mode activé.We understand that it is imperative that the push crown and the stem return to the initial position, because if they remain locked in the pushed position, or if they do not return exactly to the initial position, the watch remains blocked in the mode activated.

Une possibilité connue pour faire retourner la tige et sa couronne-poussoir dans leurs positions initiales consiste à placer un ressort de rappel dans la tête de la couronne-poussoir.One known possibility for returning the rod and its push-button crown to their initial positions consists in placing a return spring in the head of the push-button crown.

Toutefois, cette construction est en général connue des couronnes-poussoirs simples, c'est-à-dire les couronnes-poussoirs n'ayant que deux positions, la première (qui correspond à la position "0") où la tige est libre et une deuxième position (qui correspond à la position "-1") ou la tige est embrayée avec le mouvement, permettant par exemple la mise à l'heure. Une telle couronne-poussoir est décrite dans le document CH 577 701. Ici, la couronne-poussoir est également munie d'un ressort dont l'intérêt est de compenser un défaut d'alignement entre elle-même et le mouvement. Cette couronne-poussoir n'a pas la troisième position (position "1") et est d'une construction relativement simple.However, this construction is generally known for simple push crowns, that is to say the push crowns having only two positions, the first (which corresponds to position "0") where the rod is free and a second position (which corresponds to position "-1") where the rod is engaged with the movement, allowing for example the time setting. Such a push-button crown is described in the document CH 577 701. Here, the push-button crown is also provided with a spring whose advantage is to compensate for a misalignment between itself and the movement. This pusher ring does not have the third position (position "1") and is of a relatively simple construction.

Quand on veut augmenter la garantie d'étanchéité de la couronne-poussoir (montre de haute fiabilité), on peut introduire une plus grande garniture d'étanchéité dans la couronne-poussoir. Toutefois, si on introduit une telle garniture, ou si on introduit plusieurs garnitures dans une construction comme décrite ci-avant, le frottement entre la couronne-poussoir et le tube de guidage augmente fortement et on augmente ainsi le risque que la couronne-poussoir ne revienne pas dans sa position inactive à cause de ce frottement.When you want to increase the guarantee of tightness of the push-button crown (high reliability watch), you can introduce a larger seal in the push-button crown. However, if such a lining is introduced, or if several linings are introduced into a construction as described above, the friction between the pusher ring and the guide tube greatly increases and the risk that the pusher ring will therefore increase not return to its inactive position because of this friction.

La présente invention a ainsi pour but de remédier à ces défauts tout en fournissant une couronne-poussoir qui présente l'étanchéité convenant pour les montres de haute fiabilité.The present invention thus aims to remedy these defects while providing a push-button crown which has the seal suitable for high reliability watches.

Ce but est atteint grâce à une couronne-poussoir pour pièce d'horlogerie selon la revendication 1.This object is achieved by means of a push-piece crown for a timepiece according to claim 1.

Grâce à ces caractéristiques de l'invention, le ressort subit, dans sa position stable, une forte précompression de sorte que, après avoir été amenée de sa position stable vers sa position fugitive, elle revient complètement dans sa position stable dès qu'on la lâche, même si la friction due à la garniture d'étanchéité entre le tube et la couronne, est élevée.Thanks to these characteristics of the invention, the spring undergoes, in its stable position, a strong precompression so that, after having been brought from its stable position to its fleeting position, it returns completely to its stable position as soon as it is loose, even if the friction due to the seal between the tube and the crown is high.

Bien entendu, l'utilisation d'un ressort de rappel fortement précomprimé pour assurer son retour à la position initiale convient également pour les poussoirs en général par exemple à ceux dont l'actionnement ferme un contact électrique.Of course, the use of a highly precompressed return spring to ensure its return to the initial position is also suitable for pushers in general, for example to those whose actuation closes an electrical contact.

L'invention concerne également une pièce d'horlogerie caractérisée en ce qu'elle comprend une couronne-poussoir telle que définie ci-dessus.The invention also relates to a timepiece characterized in that it comprises a push-button crown as defined above.

On va décrire ci-après à titre d'exemple une forme d'exécution de l'objet de l'invention en se référant aux dessins annexés sur lesquels :

  • la figure 1 représente la couronne-poussoir selon l'invention dans la position de repos (position "0"),
  • la figure 2 représente la couronne-poussoir selon l'invention dans la position tirée (position "+1")
  • la figure 3 représente la couronne-poussoir selon l'invention dans la position poussée (position "-1"), et
  • la figure 4 montre schématiquement les forces exercées par le ressort de rappel sur la couronne-poussoir selon l'invention en fonction de la position de cette dernière.
An embodiment of the subject of the invention will be described below by way of example with reference to the appended drawings in which:
  • FIG. 1 shows the pusher ring according to the invention in the rest position (position "0"),
  • FIG. 2 represents the pusher ring according to the invention in the pulled position (position "+1")
  • FIG. 3 shows the pusher ring according to the invention in the pushed position (position "-1"), and
  • FIG. 4 schematically shows the forces exerted by the return spring on the push-button crown according to the invention as a function of the position of the latter.

On va d'abord se référer à la figure 1 qui représente un exemple de réalisation de la couronne-poussoir suivant l'invention dans sa position de repos, dite position "0".We will first refer to Figure 1 which shows an embodiment of the pusher ring according to the invention in its rest position, called position "0".

Dans cet exemple, la couronne-poussoir 1 est montée sur une carrure C d'une montre, de préférence de haut de gamme, carrure C dans le bord latéral de laquelle est vissé un tube de montage T. Ce dernier présente un rebord annulaire R définissant un épaulement radial E1 venant en appui sur un épaulement complémentaire E2 ménagé à l'embouchure d'un passage radial P percé dans le bord de la carrure C. Un joint J de préférence en argent est interposé entre les épaulement E1 et E2. Le tube T comporte encore, près de son extrémité libre un autre épaulement radial E3 dont le but apparaître par la suite.In this example, the push-button crown 1 is mounted on a middle part C of a watch, preferably high-end, middle part C in the lateral edge of which is mounted a mounting tube T. The latter has a flange annular R defining a radial shoulder E1 bearing on a complementary shoulder E2 formed at the mouth of a radial passage P pierced in the edge of the middle part C. A seal J preferably in silver is interposed between the shoulders E1 and E2 . The tube T also has, near its free end another radial shoulder E3 whose purpose will appear later.

Le tube T sert, de la façon habituelle au passage d'une tige de remontoir TR qui peut ici occuper trois positions définies par le mouvement (non représenté) de la montre à laquelle appartient la carrure C.The tube T is used, in the usual way for the passage of a winding rod TR which can here occupy three positions defined by the movement (not shown) of the watch to which the middle part C.

Les trois positions de la tige sont une position neutre ou "0" (figure 1), une position tirée dite "+1" (figure 2) dans laquelle elle permet la mise à l'heure de la montre, et une position fugitive poussée dite "-1" (figure 3) dans laquelle elle permet de commander une ou plusieurs autres fonctions de la montre, par exemple par fermeture d'un contact électrique (non représenté) prévu à l'intérieur du mouvement.The three positions of the stem are a neutral position or "0" (figure 1), a drawn position called "+1" (figure 2) in which it allows the time setting of the watch, and a fugitive pushed position called "-1" (FIG. 3) in which it makes it possible to control one or more other functions of the watch, for example by closing an electrical contact (not shown) provided inside the movement.

La tige comporte également un filetage habituel à son extrémité libre afin de permettre d'en rendre solidaire une couronne-poussoir.The rod also has a usual thread at its free end in order to allow a push-button crown to be made integral therewith.

Il est à noter que la disposition que l'on vient de décrire est classique et ne fait pas partie de l'invention. Il est à noter également que pour que l'invention trouve son application, il n'est pas nécessaire que la tige TR puisse occuper la position tirée, l'intérêt de l'invention résidant dans un meilleur rappel de la tige et de la couronne-poussoir de la position poussée "-1" vers la position neutre "0".It should be noted that the arrangement which has just been described is conventional and does not form part of the invention. It should also be noted that for the invention to find its application, it is not necessary for the rod TR to be able to occupy the pulled position, the advantage of the invention residing in a better recall of the rod and of the crown. - push-button from pushed position "-1" to neutral position "0".

Ceci étant, suivant l'invention, la couronne-poussoir 1 comprend une tête creuse 2 dont le fond présente une saillie 3 munie d'un trou borgne 4. Ce dernier est fileté intérieurement pour permettre le vissage de la couronne sur l'extrémité de la tige TR. Dans cet exemple on voit qu'à peu près à mi-longueur axiale, la paroi intérieur de la tête 2 comporte un épaulement radial 5. Plus loin vers l'extrémité ouverte de la tête 2, cette paroi interne présente une rainure annulaire 6 à fond arrondi. Enfin, prés de sa sortie, la tête 2 comporte encore une rainure annulaire 7 qui est ici de profil rectangulaire.However, according to the invention, the push-button crown 1 comprises a hollow head 2, the bottom of which has a projection 3 provided with a blind hole 4. The latter is internally threaded to allow the crown to be screwed onto the end of the rod TR. In this example, we can see that roughly halfway along the axial length, the inner wall of the head 2 has a radial shoulder 5. Further towards the open end of the head 2, this internal wall has an annular groove 6 with a rounded bottom. Finally, near its outlet, the head 2 also has an annular groove 7 which is here of rectangular profile.

Un ressort de rappel 8 de forme hélicoïdale est disposé axialement dans la tête creuse 2 et entoure la saillie 3. Ce ressort prend appui, par son extrémité intérieure sur le fond de la tête 2, tandis que son extrémité opposée est en appui sur une bague de butée 9 qui entoure l'extrémité extérieure du tube T au delà de l'épaulement E3. Cette bague 9 comporte une collerette interne 10 définissant un épaulement radial 11 destiné à venir en contact de l'épaulement E3 du tube T sous l'action du ressort 8, tout au moins dans la configuration de la couronne-poussoir 1 représentée sur la figure 1.A return spring 8 of helical shape is disposed axially in the hollow head 2 and surrounds the projection 3. This spring is supported by its inner end on the bottom of the head 2, while its opposite end is supported on a ring stop 9 which surrounds the outer end of the tube T beyond the shoulder E3. This ring 9 has an internal flange 10 defining a radial shoulder 11 intended to come into contact with the shoulder E3 of the tube T under the action of the spring 8, at least in the configuration of the push-button crown 1 shown in the figure 1.

Extérieurement, la bague de butée 9 présente une face annulaire biseautée 12 qui est destinée à venir s'appliquer contre un circlips 13 placé dans la rainure annulaire 6 de la tête 2. La bague 9 est en appui contre le circlips 13 dans les positions "0" et "+1" de la couronne-poussoir 1.Externally, the stop ring 9 has a beveled annular face 12 which is intended to come to bear against a circlip 13 placed in the annular groove 6 of the head 2. The ring 9 is in abutment against the circlip 13 in the positions " 0 "and" +1 "of the push-button crown 1.

La couronne-poussoir selon l'invention comporte encore une garniture d'étanchéité faite de deux anneaux 14 et 15 de section rectangulaire et emprisonnés entre, d'une part, une rondelle 16 venant en appui contre le circlips 13 et, d'autre part, une rondelle 17 qui est en fait une circlips engagé dans la rainure 7 de la tête 2.The push-button crown according to the invention also comprises a seal made of two rings 14 and 15 of rectangular section and trapped between, on the one hand, a washer 16 bearing against the circlip 13 and, on the other hand , a washer 17 which is in fact a circlip engaged in the groove 7 of the head 2.

Il est à noter que, dans les configurations de la couronne-poussoir représentées sur les figures 1 et 2, le ressort 8 est dans un état de précompression en étant emprisonné entre le fond de la tête 2 et l'épaulement 11. Ainsi, il engendre une force axiale en extension incapable de vaincre les forces qui maintiennent la tige TR dans sa position neutre, forces qui sont, de façon classique, imposées à cette tige par le mécanisme de mise à l'heure (non représenté) du mouvement de la montre équipée de la couronne-poussoir selon l'invention. Bien entendu, ceci est également vrai pour la position tirée "+1" de la tige TR retenue en général à l'intérieur du mouvement par une butée axiale empêchant la tige TR de se désolidariser du mouvement. La précompression peut être égale par exemple à 60% de la force de serrage totale du ressort 8, lorsque toutes ses spires sont serrées les unes contre les autres.It should be noted that, in the configurations of the push crown represented in FIGS. 1 and 2, the spring 8 is in a state of precompression while being trapped between the bottom of the head 2 and the shoulder 11. Thus, it generates an axial force in extension incapable of defeating the forces which maintain the rod TR in its neutral position, forces which are conventionally imposed on this rod by the time-setting mechanism (not shown) of the movement of the watch fitted with the push-button crown according to the invention. Of course, this is also true for the pulled position "+1" of the rod TR generally retained inside the movement by an axial stop preventing the rod TR from detaching from the movement. The precompression can be equal, for example, to 60% of the total clamping force of the spring 8, when all of its turns are clamped against each other.

On va maintenant décrire le fonctionnement de la couronne-poussoir 1 selon l'invention en examinant successivement les figures 1, 2 et 3, à l'aide du graphique explicatif de la figure 4.We will now describe the operation of the push-button crown 1 according to the invention by successively examining FIGS. 1, 2 and 3, using the explanatory graph of FIG. 4.

Il a déjà été indiqué ci-dessus que la couronne-poussoir selon l'invention est destinée plus particulièrement à assurer une course de rappel irréprochable de la tige TR à partir de sa position fugitive "-1" vers sa position neutre "0", et ce malgré les forces de friction qui peuvent être exercées sur cette tige par la garniture d'étanchéité qui l'entoure.It has already been indicated above that the push-button crown according to the invention is intended more particularly to ensure an irreproachable return stroke of the rod TR from its fleeting position "-1" towards its neutral position "0", and this despite the friction forces which can be exerted on this rod by the seal which surrounds it.

On remarquera que dans l'exemple décrit ici, la couronne-poussoir 1 peut se déplacer de part et d'autre de sa position "0" sur une distance qui est de préférence la même. En d'autres termes, sa course axiale est la même autour de cette position "0". Sur les figures, cette course est, à titre d'exemple, de 0,35 mm, la distance séparant la face de la tête 2 en regard de la carrure , et la face latérale de celle-ci étant respectivement de 0,50 mm, de 0,85 mm et de 0,15 mm suivant que la couronne-poussoir se trouve dans ses positions "0", "+1" et "-1".Bien entendu, ces dimensions dépendent essentiellement de la construction du mouvement auquel la couronne-poussoir est associée et elles peuvent donc varier d'un type de mouvement à l'autre.It will be noted that in the example described here, the push-button crown 1 can move on either side of its position "0" over a distance which is preferably the same. In other words, its axial stroke is the same around this "0" position. In the figures, this stroke is, for example, 0.35 mm, the distance separating the face of the head 2 facing the middle, and the lateral face of the latter being respectively 0.50 mm , 0.85 mm and 0.15 mm depending on whether the push-button crown is in its "0", "+1" and "-1" positions. Of course, these dimensions essentially depend on the construction of the movement at which the push-button crown is associated and they can therefore vary from one type of movement to another.

Dans la position "0" de la figure 1, le ressort 8 est sous précompression et il tend donc à écarter le fond de la tête 2 de la face de la bague de butée 9 contre laquelle il est en appui. De ce fait, la bague de butée 9 est appuyée non seulement contre le circlips 13, mais également contre l'épaulement E3 du tube T. Ainsi, cette position "0" est parfaitement stable.In the "0" position of FIG. 1, the spring 8 is under precompression and it therefore tends to move the bottom of the head 2 away from the face of the stop ring 9 against which it bears. Therefore, the stop ring 9 is pressed not only against the circlip 13, but also against the shoulder E3 of the tube T. Thus, this position "0" is perfectly stable.

Si maintenant, l'utilisateur déplace l'ensemble tige TR et couronne-poussoir 1 vers l'extérieur, afin de pouvoir effectuer une commande de mise à l'heure de la montre par exemple, il tire sure la couronne-poussoir 1, ce qui fait se déplacer l'ensemble axialement d'une même translation par rapport à la carrure C. (Passage de la position "0" de la figure 1 vers la position "+1" de la figure 2. De ce fait rien ne change pour le ressort 8 qui reste tendu entre ses butées avec la même précompression. En revanche, on notera que la bague de butée 9 s'est levée de son épaulement E3 du tube T. On voit donc que la tige TR s'est déplacée axialement par rapport à la carrure C. Il est à noter que pendant ce déplacement, la garniture d'étanchéité formée des anneaux 14 et 15 s'est déplacée par rapport au tube T, mais ce déplacement n'engendre aucune gêne pour le bon fonctionnement, puisque les forces de friction sont ici vaincues par l'utilisateur de la montre.If the user now moves the stem TR and push-button 1 assembly outwards, in order to be able to carry out a time-setting command for the watch, for example, he pulls the push-button crown 1, this which causes the assembly to move axially in the same translation relative to the middle part C. (Passage from position "0" in FIG. 1 to position "+1" in FIG. 2. Nothing therefore changes. for the spring 8 which remains tensioned between its stops with the same precompression, on the other hand, it will be noted that the stop ring 9 is lifted from its shoulder E3 of the tube T. It can therefore be seen that the rod TR has moved axially relative to the middle part C. It should be noted that during this movement, the seal formed by the rings 14 and 15 has moved relative to the tube T, but this movement does not cause any discomfort for the proper functioning, since the friction forces are here overcome by the user of the watch.

Par conséquent, la force de rappel due au ressort 8 reste nulle et elle n'évolue pas entre les deux positions que l'on vient d'examiner. (partie droite du graphique de la figure 4).Consequently, the restoring force due to the spring 8 remains zero and it does not change between the two positions that we have just examined. (right part of the graph in Figure 4).

Il en va tout autrement, lorsque l'on passe de la position neutre "0" de la figure 1 à la position fugitive "-1" de la figure 3. Dans ce cas, en effet, la bague de butée 9 est axialement retenue par l'épaulement E3 du tube T, de sorte que, dès que la tête 2 est déplacée axialement vers la carrure C, le ressort 8 va être comprimé davantage qu'il ne l'était dans son état de précompression. Cependant, la force résistante du ressort ou en d'autres termes sa force de rappel est alors d'emblée égale à la valeur de la force de précompression Fo, c'est-à-dire dès que le circlips 13 se détaché de la bague de butée 9. En poursuivant la course, cette force de rappel ne fait qu'augmenter selon la constante du ressort.It is quite different, when we pass from the neutral position "0" in Figure 1 to the fleeting position "-1" in Figure 3. In this case, in fact, the stop ring 9 is axially retained by the shoulder E3 of the tube T, so that, as soon as the head 2 is moved axially towards the middle part C, the spring 8 will be compressed more than it was in its precompression state. However, the resisting force of the spring or in other words its restoring force is then immediately equal to the value of the precompression force F o , that is to say as soon as the circlip 13 is detached from the stop ring 9. By continuing the stroke, this restoring force only increases according to the constant of the spring.

On voit donc qu'il y a une transition brusque dans l'évolution de la force de rappel au début de la course d'enfoncement de la couronne-poussoir (partie de gauche du graphique de la figure 4). Cette brusque augmentation loin d'être gênante pour l'utilisateur (car il s'agit de toute manière de forces relativement faible), elle est en revanche très utile pour ramener la couronne-poussoir 1 et la tige TR à la position neutre de la figure 1.We therefore see that there is an abrupt transition in the evolution of the restoring force at the start of the push-in stroke of the push-button crown (left part of the graph in Figure 4). This sudden increase far from being annoying for the user (because it is anyway relatively low forces), it is however very useful to bring the push-button crown 1 and the rod TR to the neutral position of the figure 1.

En effet, lors de l'enfoncement, on voit que les anneaux 14 et 15 fortement appuyés contre le tube T pour garantir la bonne étanchéité, glissent sur le tube T. Mais comme le ressort 8 rappèle l'ensemble avec une force qui se compose de la force de précompression à laquelle s'ajoute la force de déformation dynamique du ressort, le retour vers la position neutre ne pose aucun problème, la friction des anneaux sur le tube T étant facilement vaincue.Indeed, during insertion, we see that the rings 14 and 15 strongly pressed against the tube T to guarantee good sealing, slide on the tube T. But as the spring 8 recalls the whole with a force which is composed the precompression force to which is added the dynamic deformation force of the spring, the return to the neutral position poses no problem, the friction of the rings on the tube T being easily overcome.

Dans le mode de réalisation décrit, la course d'enfoncement vers la position fugitive "-1", est limitée par l'épaulement 5 de la tête 2. Lorsque comme représenté, l'épaulement 5 vient en contact avec la bague de butée 9, le ressort 8 est comprimé de manière à fournir une force de rappel qui est très proche de sa force de compression maximale (Fmax sur la figure 4). Il est possible, selon une variante non-représentée aux figures, d'omettre l'épaulement 5, moyennant quoi la fin de la course d'enfoncement sera définie par la compression totale du ressort 8, toutes ses spires étant alors appuyées les unes sur les autres.In the embodiment described, the driving stroke towards the fugitive position "-1" is limited by the shoulder 5 of the head 2. When, as shown, the shoulder 5 comes into contact with the stop ring 9 , the spring 8 is compressed so as to provide a return force which is very close to its maximum compression force (Fmax in FIG. 4). It is possible, according to a variant not shown in the figures, to omit the shoulder 5, whereby the end of the driving stroke will be defined by the total compression of the spring 8, all of its turns then being pressed one on the other. others.

Avantageusement, on peut choisir la force de précompression Fo en fonction des besoins. Par exemple, dans le cas de l'utilisation d'une couronne-poussoir selon l'invention dans des montres pour plongeur, il est important que la pression de l'eau ne puisse pas enfoncer la couronne-poussoir. On doit alors choisir cette précompression en fonction de la profondeur qui peut être atteinte avec la montre. On comprend ainsi qu'il faut pousser relativement fortement la couronne-poussoir pour atteindre la position "-1" pour les montres étanches à une très grande profondeur. Dans un tel cas, la précompression Fo peut être égale à plus de 70 % de la force de compression maximale Fmax Advantageously, the precompression force F o can be chosen according to the needs. For example, in the case of the use of a push-button crown according to the invention in watches for divers, it is important that the water pressure cannot push the push-button crown. We must then choose this precompression according to the depth that can be reached with the watch. We understand that it is necessary push the push crown relatively hard to reach position "-1" for waterproof watches at a very great depth. In such a case, the precompression F o can be equal to more than 70% of the maximum compression force F max

Claims (7)

Couronne-poussoir (1) pour pièce d'horlogerie, montée sur un tube de guidage (T) fixé dans un boîtier (C) logeant le mouvement de ladite pièce d'horlogerie, et destinée à être solidaire tant en rotation qu'axialement d'une tige de commande (TR) appartenant également à ladite pièce d'horlogerie, ladite tige (TR) pouvant occuper au moins deux positions axiales, dont une première ("0") est stable et dont une seconde ("-1") est fugitive, ladite couronne-poussoir (1) comprenant - une tête (2) destinée à être solidaire de ladite tige et montée mobile axialement sur ledit tube (T) de manière à pouvoir être placée dans au moins deux positions distinctes correspondant auxdites positions de la tige (TR) pour commander au moins une fonction de ladite pièce d'horlogerie, et - un ressort de rappel (8) prenant appui par une extrémité sur ladite tête (2) pour la solliciter vers ladite position stable, ladite couronne-poussoir (1) étant caractérisé en ce que - ledit ressort (8) prend aussi appui par son autre extrémité sur une butée annulaire (9) mobile dans ladite tête (2) entre une première position, qui correspond à ladite position stable, dans laquelle ladite butée (9) appuie sur un épaulement (13) ménagé à l'intérieur de ladite tête (2) de façon à assurer la précompression dudit ressort (8), et une deuxième position correspondant à ladite position fugitive, dans laquelle la butée (9) repose sur un épaulement (E3) ménagé sur ledit tube (T). Push-button crown (1) for a timepiece, mounted on a guide tube (T) fixed in a housing (C) housing the movement of said timepiece, and intended to be integral both in rotation and axially d '' a control rod (TR) also belonging to said timepiece, said rod (TR) being able to occupy at least two axial positions, one of which first ("0") is stable and one of which second ("-1") is fleeting, said pusher ring (1) comprising - A head (2) intended to be integral with said rod and mounted axially movable on said tube (T) so as to be able to be placed in at least two distinct positions corresponding to said positions of the rod (TR) to control at least one function of said timepiece, and - a return spring (8) bearing at one end on said head (2) to urge it towards said stable position, said pusher ring (1) being characterized in that - Said spring (8) is also supported by its other end on an annular stop (9) movable in said head (2) between a first position, which corresponds to said stable position, in which said stop (9) presses on a shoulder (13) formed inside said head (2) so as to ensure the precompression of said spring (8), and a second position corresponding to said fleeting position, in which the stop (9) rests on a shoulder (E3) formed on said tube (T). Couronne-poussoir selon la revendication 1, caractérisée en ce que ladite butée annulaire mobile (9) est placée dans ladite tête (2), lorsque cette tête (2) est dans ladite position stable ("0"), en étant en appui sur un organe (13) formant épaulement axial ménagé à l'intérieur de ladite tête (2).Push-button crown according to claim 1, characterized in that said movable annular stop (9) is placed in said head (2), when this head (2) is in said stable position ("0"), while being supported on a member (13) forming an axial shoulder formed inside said head (2). Couronne-poussoir selon la revendication 2, caractérisée en ce que ledit organe formant épaulement (13) est un circlips placé dans une rainure annulaire interne (6) de ladite tête (2).Push-button crown according to claim 2, characterized in that said shoulder member (13) is a circlip placed in an internal annular groove (6) of said head (2). Couronne-poussoir selon l'une quelconque des revendications précédentes, caractérisée en ce que la précompression dudit ressort (8) est d'au moins environ 60 % de sa compression maximale engendrée lorsque toutes ses spires sont serrées les unes contre les autres.Push-button crown according to any one of the preceding claims, characterized in that the precompression of said spring (8) is at least about 60% of its maximum compression generated when all of its turns are pressed against each other. Couronne-poussoir selon l'une des revendications précédentes caractérisée en ce qu'elle comprend en outre un joint d'étanchéité (14,15) placé entre ladite tête (2) et ledit tube (T) et isolant de l'extérieur ladite couronne-poussoir (1) et son ressort (8), ainsi que le mouvement de la pièce, de l'extérieur.Push-button crown according to one of the preceding claims, characterized in that it further comprises a seal (14,15) placed between said head (2) and said tube (T) and insulating said crown from the outside. -pusher (1) and its spring (8), as well as the movement of the part, from the outside. Couronne-poussoir selon la revendication 5, caractérisée en ce que ledit joint d'étanchéité (14,15) est maintenu dans ladite tête (1) par des rondelles dont l'une est en appui axial contre ledit organe formant épaulement (13) et dont l'autre est engagée dans une rainure annulaire (7) pratiquée à l'intérieur de ladite tête (1).Push-button crown according to Claim 5, characterized in that the said seal (14,15) is held in the said head (1) by washers, one of which bears axially against the said member forming the shoulder (13) and the other of which is engaged in an annular groove (7) formed inside said head (1). Pièce d'horlogerie caractérisée en ce qu'elle comprend une couronne-poussoir selon l'une quelconque des revendications précédentes.Timepiece characterized in that it comprises a push-button crown according to any one of the preceding claims.
EP94118080A 1993-11-25 1994-11-17 Winding-button with push-piece for a timepiece Expired - Lifetime EP0655664B1 (en)

Applications Claiming Priority (2)

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CH03531/93A CH685901B5 (en) 1993-11-25 1993-11-25 Crown-button timepiece.
CH3531/93 1993-11-25

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EP0655664B1 EP0655664B1 (en) 1997-05-02

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EP (1) EP0655664B1 (en)
JP (1) JP3479132B2 (en)
KR (1) KR100355183B1 (en)
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CH (1) CH685901B5 (en)
DE (1) DE69402945T2 (en)
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US6227700B1 (en) 1998-05-13 2001-05-08 Eta Sa Fabriques D'ebauches Push button device for a timepiece, in particular a chronograph
EP0957415A1 (en) * 1998-05-14 1999-11-17 Eta SA Fabriques d'Ebauches Push-button device for timepiece,especially chronograph
EP2107432A1 (en) * 2008-04-01 2009-10-07 Montres Rado S.A. Pushbutton control device for a watch
US7967504B2 (en) 2008-04-01 2011-06-28 Montres Rado S.A. Push-button control device for a watch
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Also Published As

Publication number Publication date
KR950015013A (en) 1995-06-16
DE69402945D1 (en) 1997-06-05
CN1111765A (en) 1995-11-15
KR100355183B1 (en) 2002-12-16
CH685901GA3 (en) 1995-11-15
TW259852B (en) 1995-10-11
US5521890A (en) 1996-05-28
JP3479132B2 (en) 2003-12-15
DE69402945T2 (en) 1997-11-20
CN1050910C (en) 2000-03-29
HK1007808A1 (en) 1999-04-23
CH685901B5 (en) 1996-05-15
JPH07198863A (en) 1995-08-01
SG88717A1 (en) 2002-05-21
EP0655664B1 (en) 1997-05-02

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