EP4163738B1 - Watch case with a bayonet connection - Google Patents

Watch case with a bayonet connection Download PDF

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Publication number
EP4163738B1
EP4163738B1 EP21201627.3A EP21201627A EP4163738B1 EP 4163738 B1 EP4163738 B1 EP 4163738B1 EP 21201627 A EP21201627 A EP 21201627A EP 4163738 B1 EP4163738 B1 EP 4163738B1
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EP
European Patent Office
Prior art keywords
watch case
stop
catch
groove
assembly
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EP21201627.3A
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German (de)
French (fr)
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EP4163738A1 (en
Inventor
Christian Botteron
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Individual
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Individual
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Priority to EP21201627.3A priority Critical patent/EP4163738B1/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
    • G04B37/00—Cases
    • G04B37/08—Hermetic sealing of openings, joints, passages or slits
    • 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
    • G04B37/0008—Cases for pocket watches and wrist watches
    • G04B37/0041—Cases for pocket watches and wrist watches the cover or the bottom can slide or turn with a spring action
    • 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
    • G04B37/084—Complete encasings for wrist or pocket watches without means for hermetic sealing of winding stem or crown

Definitions

  • the invention relates to a watch case comprising two parts assembled with a bayonet connection.
  • the watch case includes a back and a middle which can be assembled by screwing. It may be required that the back be oriented in a given angular position relative to the middle. This is typically the case when the background is provided with a logo, or more generally with an inscription, which must always be positioned at a precise location in relation to the middle. In this regard, the assembly with a screw thread offers insufficient precision. Likewise, the reproducibility from one assembly to another is not satisfactory.
  • the object of the invention is to overcome the aforementioned disadvantages by proposing a robust, precise and reproducible assembly.
  • the invention relates to a watch case comprising two parts assembled with a bayonet type connection.
  • the present invention relates to a watch case whose orientation is defined relative to a central axis A perpendicular to the plane of the watch case, said watch case comprising a first part and a second part capable of adopting the 'one relative to the other a so-called locking position, a so-called assembly position and a so-called disassembly position, the first part comprising a plurality of edges distributed around its outer periphery and projecting in a direction opposite to the axis central A, at least one of the edges comprising a lug extending in a direction parallel to said central axis A, the second part comprising on its interior periphery a plurality of clearances allowing the passage of said edges in the assembly and disassembly positions, said clearances opening onto a groove formed especially around the perimeter of an interior wall of the second part, said groove accommodating the edges in each of the positions and opening in turn onto a groove formed around a portion of the perimeter of the interior wall of the second part, said groove being de
  • the watch case is thus provided with means of assembly between the two parts without an elastically deformable zone.
  • the lug as well as the groove accommodating the lug are rigid.
  • the radial compression joint prevents accidental movement between the two parts when assembled. According to the invention, only a radial compression seal is required to ensure radial tightening.
  • the invention also makes it possible to achieve a sealed and secure assembly of the two parts while minimizing the number of components required to ensure this assembly and this with moderate manufacturing costs.
  • the assembly does not require a ring between the first and second parts
  • the invention relates to a watch box 1 visible at the figure 1 comprising two parts 2.3 assembled by a bayonet connection.
  • one part 2 called the first part
  • the other part 3 called the second part
  • the assembly principle with a bayonet connection as described below could be used for other parts of a watch case such as a bezel intended to be assembled to a caseband.
  • the bayonet connection is formed by a groove delimited by stops with the groove formed in one part and by a lug positioned on the other part intended to cooperate with said groove as described below.
  • the positioning of the lug against one of the stops defines a given relative position between the two parts with alignment of the marks 15 in the example of the figure 1 .
  • the bayonet connection could include several lugs cooperating with several grooves.
  • the first part 2 comprises an annular base 2a with at the outer periphery of the base 2a a support surface 2b for the second part 3.
  • the annular base 2a is surmounted by a wall 2c positioned set back from the support surface 2b.
  • the wall 2c is delimited at its upper end, i.e. its end opposite the annular base 2a, by a plurality of flanges 4, also called ears, projecting radially in a direction opposite the center of the first part 2.
  • these flanges 4 are arranged at regular intervals on the outer periphery of the wall 2c.
  • At least one of the edges 4 is provided with a lug 5 rising in a direction parallel to the central axis A of the watch case.
  • this lug 5 is positioned in the middle of the arc of a circle defined by the rim 4.
  • the second part 3 also comprises an annular base 3a partly forming a support surface intended to be in contact with the support surface 2b of the first part 2.
  • the annular base 3a has on its inner edge a series of clearances 9 of complementary shape or of dimensions greater than the edges 4 of the first part 2 so as to allow their engagement during assembly.
  • the inner edge of the annular base 3a is thus formed of a plurality of recesses 9 each framed by a bearing 10.
  • These clearances 9 communicate with an annular groove 7 formed in the interior wall 3b of the second part 3 over its entire circumference. This groove 7 in turn opens onto a groove 6 occupying an annular portion of the interior wall 3b.
  • This groove 6 is delimited by two stops 6a, 6b intended to cooperate with the lug 5 whose movement during assembly is thus limited by the stops.
  • a first stop 6a is positioned opposite a clearance 9 to allow the assembly and disassembly of the two parts. More precisely, the first stop 6a is arranged at a minimum distance from one end of the clearance 9 ( fig.3a ) equal to half of the arc of a circle defined by the flange to allow insertion of the flange into the clearance.
  • the second stop 6b is positioned under a span 10 framing the clearance 9 ( fig.6 ). This second stop corresponds to the desired alignment position between the two parts as shown schematically by mark 15 on the Figure 6 . It will be specified that to facilitate the machining of the second stop a notch 16 can be made on the annular base 3a opposite the second stop to be machined to access the latter.
  • the watch case 1 comprises a radial compression joint 14 intended to apply a clamping force on the first part and thereby prevent accidental movement of the first part relative to the second part.
  • this radial compression seal 14 is positioned in the bottom of the annular groove 7 between the latter and the first part 2.
  • the watch case 1 further conventionally comprises several seals 12,13 which ensure sealing between the crystals and respectively the back and the middle and between the back and the middle for the example illustrated.
  • the ice seals 12 are positioned in grooves 17 formed respectively in the first part 2 and the second part 3 ( fig.7 ).
  • the axial compression joint 13 between the first part 2 and the second part 3 is positioned in a groove 18 formed in the annular base 3a of the second part 3 ( fig.3a And fig.7 ).
  • the assembly process takes place as follows.
  • the first part can occupy, relative to the second part, a so-called assembly position, a so-called locking position and a so-called disassembly position.
  • the rim 4 provided with the lug 5 of the first part 2 is positioned opposite the clearance 9 of the second part 3 communicating with the groove 6 provided with the stops 6a, 6b.
  • the lug 5 is positioned near the first stop 6a and slides into the groove 6.
  • the lug is positioned a few angular degrees from the first stop during assembly in order to facilitate the latter.
  • the relative angular displacement of an angle ⁇ between the first part and the second part is carried out using a special tool such as a wrench to overcome the friction force exerted by the radial compression joint.
  • This movement positions the lug 5 against the second stop 6b ( fig.8a and fig.8c ) and thus align the first part relative to the second part in the desired position indicated by marks 15 at the figure 1 .
  • the first part thus occupies the so-called locking position in relation to the second part.
  • the two parts are immobilized in this angular locking position thanks to the action of the radial compression joint.
  • the axial movement along axis A of the first part relative to the second part is prevented by the edge of the first part being housed in the groove under the bearing of the second part.
  • the lug 5 is positioned against the first stop 6a of the first part during a relative rotation between the two parts.
  • the first part can be separated from the second part.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Gasket Seals (AREA)
  • Connection Of Plates (AREA)

Description

Domaine de l'inventionField of the invention

L'invention concerne une boîte de montre comprenant deux pièces assemblées avec une liaison à baïonnette.The invention relates to a watch case comprising two parts assembled with a bayonet connection.

Arrière-plan de l'inventionBackground of the invention

La boîte de montre comprend un fond et une carrure qui peuvent être assemblés par vissage. Il peut être requis que le fond soit orienté dans une position angulaire donnée par rapport à la carrure. C'est typiquement le cas lorsque le fond est muni d'un logo, ou plus généralement d'une inscription, qui doit toujours être positionnée à un endroit précis par rapport à la carrure. A cet égard, l'assemblage avec un pas de vis offre une précision insuffisante. De même, la reproductibilité d'un assemblage à un autre n'est pas satisfaisante.The watch case includes a back and a middle which can be assembled by screwing. It may be required that the back be oriented in a given angular position relative to the middle. This is typically the case when the background is provided with a logo, or more generally with an inscription, which must always be positioned at a precise location in relation to the middle. In this regard, the assembly with a screw thread offers insufficient precision. Likewise, the reproducibility from one assembly to another is not satisfactory.

D'autres assemblages via des ergots coopérant avec des languettes élastiques définissant une rainure ont été proposés pour remplacer le pas de vis. Le document EP 2 874 022 décrit un tel assemblage. Ces assemblages ont cependant pour désavantage d'être moins robuste dans le temps lors de montage et démontage successifs avec des risques de casse de la zone déformable élastiquement.Other assemblies via lugs cooperating with elastic tabs defining a groove have been proposed to replace the screw thread. The document EP 2 874 022 describes such an assembly. These assemblies, however, have the disadvantage of being less robust over time during successive assembly and disassembly with the risk of breakage of the elastically deformable zone.

Le document JP S56 92880 U montre toutes les caractéristiques du préambule de la revendication 1 annexée.The document JP S56 92880 U shows all the features of the preamble of appended claim 1.

Résumé de l'inventionSummary of the invention

L'invention a pour objet de pallier aux désavantages précités en proposant un assemblage robuste, précis et reproductible.The object of the invention is to overcome the aforementioned disadvantages by proposing a robust, precise and reproducible assembly.

A cet effet, l'invention concerne une boîte de montre comprenant deux pièces assemblées avec une liaison de type baïonnette.To this end, the invention relates to a watch case comprising two parts assembled with a bayonet type connection.

Plus précisément, la présente invention se rapporte à une boîte de montre dont l'orientation est définie par rapport à un axe central A perpendiculaire au plan de la boîte de montre, ladite boîte de montre comprenant une première pièce et une seconde pièce pouvant adopter l'une par rapport à l'autre une position dite de verrouillage, une position dite de montage et une position dite de démontage, la première pièce comprenant une pluralité de rebords répartis sur son pourtour extérieur et faisant saillie dans une direction opposée à l'axe central A, au moins un des rebords comprenant un ergot s'étendant dans une direction parallèle audit axe central A, la seconde pièce comprenant sur son pourtour intérieur une pluralité de dégagements permettant le passage desdits rebords dans les positions de montage et démontage, lesdits dégagements débouchant sur une gorge ménagée surtout le pourtour d'une paroi intérieure de la seconde pièce, ladite gorge accueillant les rebords dans chacune des positions et débouchant à son tour sur une rainure ménagée sur une portion du pourtour de la paroi intérieure de la seconde pièce, ladite rainure étant délimitée à ses extrémités par respectivement une première butée et une deuxième butée, ladite rainure accueillant l'ergot avec la première butée limitant le déplacement de l'ergot dans les positions de démontage et montage et avec la deuxième butée limitant le déplacement de l'ergot dans la position de verrouillage, ladite boîte de montre comprenant également un premier joint de compression appliquant une force de serrage sur la première pièce dans une direction perpendiculaire à l'axe central A dans la position de verrouillage, ledit premier joint de compression étant logé dans le fond de la gorge de la seconde pièce.More precisely, the present invention relates to a watch case whose orientation is defined relative to a central axis A perpendicular to the plane of the watch case, said watch case comprising a first part and a second part capable of adopting the 'one relative to the other a so-called locking position, a so-called assembly position and a so-called disassembly position, the first part comprising a plurality of edges distributed around its outer periphery and projecting in a direction opposite to the axis central A, at least one of the edges comprising a lug extending in a direction parallel to said central axis A, the second part comprising on its interior periphery a plurality of clearances allowing the passage of said edges in the assembly and disassembly positions, said clearances opening onto a groove formed especially around the perimeter of an interior wall of the second part, said groove accommodating the edges in each of the positions and opening in turn onto a groove formed around a portion of the perimeter of the interior wall of the second part, said groove being delimited at its ends by respectively a first stop and a second stop, said groove accommodating the lug with the first stop limiting the movement of the lug in the disassembly and assembly positions and with the second stop limiting the movement of the lug in the locking position, said watch case also comprising a first compression joint applying a clamping force on the first part in a direction perpendicular to the central axis A in the locking position, said first compression joint being housed in the bottom of the groove of the second piece.

La boîte de montre est ainsi pourvue de moyens d'assemblage entre les deux pièces sans zone déformable élastiquement. En d'autres mots, l'ergot de même que la rainure accueillant l'ergot sont rigides.The watch case is thus provided with means of assembly between the two parts without an elastically deformable zone. In other words, the lug as well as the groove accommodating the lug are rigid.

La coopération entre l'ergot et la rainure munie des butées permet ainsi un positionnement relatif précis entre les deux pièces.The cooperation between the lug and the groove provided with stops thus allows precise relative positioning between the two parts.

En outre, le joint de compression radiale empêche tout déplacement accidentel entre les deux pièces lorsqu'elles sont assemblées. Selon l'invention, seul un joint de compression radiale est requis pour assurer le serrage radial.Additionally, the radial compression joint prevents accidental movement between the two parts when assembled. According to the invention, only a radial compression seal is required to ensure radial tightening.

L'invention permet également de réaliser un assemblage étanche et sécurisé des deux pièces tout en minimisant le nombre de composants requis pour assurer cet assemblage et ce avec des coûts de fabrication modérés. Ainsi, l'assemblage ne requiert pas de bague entre les première et seconde piècesThe invention also makes it possible to achieve a sealed and secure assembly of the two parts while minimizing the number of components required to ensure this assembly and this with moderate manufacturing costs. Thus, the assembly does not require a ring between the first and second parts

D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description détaillée ci-après.Other characteristics and advantages of the invention will appear on reading the detailed description below.

Brève description des figuresBrief description of the figures

  • La figure 1 représente une vue en plan de la boîte de montre comprenant les deux pièces assemblées avec une liaison à baïonnette selon l'invention.There figure 1 represents a plan view of the watch case comprising the two parts assembled with a bayonet connection according to the invention.
  • La figure 2 représente une vue éclatée avec les différentes pièces de la boîte de montre dont le fond et la carrure assemblés avec la liaison à baïonnette.There figure 2 represents an exploded view with the different parts of the watch case including the back and the middle assembled with the bayonet connection.
  • La figure 3a représente une vue en plan de la carrure de la boîte de montre selon l'invention. La figure 3b représente une vue en coupe dans un plan perpendiculaire à l'axe A de la carrure de la boîte de montre selon l'invention.There figure 3a represents a plan view of the middle of the watch case according to the invention. There figure 3b represents a sectional view in a plane perpendicular to the axis A of the middle of the watch case according to the invention.
  • La figure 4 représente une vue en plan du fond de la boîte de montre selon l'invention.There figure 4 represents a plan view of the bottom of the watch case according to the invention.
  • La figure 5 représente deux vues en perspective du fond de la boîte de montre selon l'invention.There figure 5 represents two perspective views of the bottom of the watch case according to the invention.
  • La figure 6 représente deux vues en perspective de la carrure de la boîte de montre selon l'invention.There Figure 6 represents two perspective views of the middle of the watch case according to the invention.
  • La figure 7 représente une vue en plan de la boîte de montre selon l'invention avec des vues en coupe axiale selon les plans A-A et B-B.There Figure 7 represents a plan view of the watch case according to the invention with views in axial section along planes AA and BB.
  • La figure 8a représente une vue en coupe dans un plan perpendiculaire à l'axe A du fond et de la carrure en position assemblée. La figure 8b représente une vue en coupe dans un plan perpendiculaire à l'axe A du fond et de la carrure en position de démontage et montage. La figure 8c représente une vue en coupe selon un autre plan perpendiculaire à l'axe A du fond et de la carrure en position assemblée. La figure 8d représente avec une vue en coupe pour ce même plan perpendiculaire à l'axe A, le fond et la carrure en position de montage et démontage.There figure 8a represents a sectional view in a plane perpendicular to axis A of the back and the middle in the assembled position. There figure 8b represents a sectional view in a plane perpendicular to axis A of the back and the middle in the disassembly and assembly position. There figure 8c represents a sectional view along another plane perpendicular to axis A of the back and the middle in the assembled position. There figure 8d represents with a sectional view for this same plane perpendicular to axis A, the back and the middle in the assembly and disassembly position.
Description détailléedetailed description

L'invention concerne une boîte de montre 1 visible à la figure 1 comprenant deux pièces 2,3 assemblées par une liaison à baïonnette. Dans l'exemple illustré, une pièce 2, dite première pièce, est un fond et l'autre pièce 3, dite seconde pièce, est une carrure. Le principe d'assemblage avec une liaison à baïonnette tel que décrit ci-après pourrait être utilisé pour d'autres pièces d'une boîte de montre telles qu'une lunette destinée à être assemblée à une carrure.The invention relates to a watch box 1 visible at the figure 1 comprising two parts 2.3 assembled by a bayonet connection. In the example illustrated, one part 2, called the first part, is a back and the other part 3, called the second part, is a middle part. The assembly principle with a bayonet connection as described below could be used for other parts of a watch case such as a bezel intended to be assembled to a caseband.

La liaison à baïonnette est formée par une rainure délimitée par des butées avec la rainure ménagée dans une pièce et par un ergot positionné sur l'autre pièce destiné à coopérer avec ladite rainure comme décrit ci-après. Le positionnement de l'ergot contre une des butées définit une position relative donnée entre les deux pièces avec alignement des repères 15 dans l'exemple de la figure 1. On précisera que la liaison baïonnette pourrait comprendre plusieurs ergots coopérant avec plusieurs rainures.The bayonet connection is formed by a groove delimited by stops with the groove formed in one part and by a lug positioned on the other part intended to cooperate with said groove as described below. The positioning of the lug against one of the stops defines a given relative position between the two parts with alignment of the marks 15 in the example of the figure 1 . It will be noted that the bayonet connection could include several lugs cooperating with several grooves.

Tel que montré aux figures 4, 5 et 7, la première pièce 2 comporte une base annulaire 2a avec en périphérie extérieure de la base 2a une surface d'appui 2b pour la seconde pièce 3. La base annulaire 2a est surmontée par une paroi 2c se positionnant en retrait de la surface d'appui 2b. La paroi 2c est délimitée à son extrémité supérieure, c.à.d. son extrémité opposée à la base annulaire 2a, par une pluralité de rebords 4, aussi appelées oreilles, faisant saillie radialement dans une direction opposée au centre de la première pièce 2. Préférentiellement, ces rebords 4 sont disposés à intervalles réguliers sur le pourtour extérieur de la paroi 2c. Selon l'invention, au moins un des rebords 4 est muni d'un ergot 5 se dressant dans une direction parallèle à l'axe central A de la boîte de montre. Préférentiellement, cet ergot 5 se positionne au milieu de l'arc de cercle défini par le rebord 4.As shown in figures 4 , 5 And 7 , the first part 2 comprises an annular base 2a with at the outer periphery of the base 2a a support surface 2b for the second part 3. The annular base 2a is surmounted by a wall 2c positioned set back from the support surface 2b. The wall 2c is delimited at its upper end, i.e. its end opposite the annular base 2a, by a plurality of flanges 4, also called ears, projecting radially in a direction opposite the center of the first part 2. Preferably, these flanges 4 are arranged at regular intervals on the outer periphery of the wall 2c. According to the invention, at least one of the edges 4 is provided with a lug 5 rising in a direction parallel to the central axis A of the watch case. Preferably, this lug 5 is positioned in the middle of the arc of a circle defined by the rim 4.

Tel que représenté aux figures 3, 6 et 7, la seconde pièce 3 comporte également une base annulaire 3a formant en partie une surface d'appui destinée à être en contact avec la surface d'appui 2b de la première pièce 2. La base annulaire 3a comporte sur son bord intérieur une série de dégagements 9 de forme complémentaire ou de dimensions supérieures aux rebords 4 de la première pièce 2 de manière à permettre leur engagement lors de l'assemblage. Le bord intérieur de la base annulaire 3a est ainsi formé d'une pluralité de dégagements 9 encadrés chacun par une portée 10. Ces dégagements 9 communiquent avec une gorge annulaire 7 ménagée dans la paroi intérieure 3b de la seconde pièce 3 sur tout son pourtour. Cette gorge 7 débouche à son tour sur une rainure 6 occupant une portion annulaire de la paroi intérieure 3b. Cette rainure 6 est délimitée par deux butées 6a,6b destinée à coopérer avec l'ergot 5 dont le déplacement lors de l'assemblage est ainsi limité par les butées. Une première butée 6a se positionne en regard d'un dégagement 9 pour permettre le montage et le démontage des deux pièces. Plus précisément, la première butée 6a est disposée à une distance minimum d'une extrémité du dégagement 9 (fig.3a) égale à la moitié de l'arc de cercle défini par le rebord pour permettre l'insertion du rebord dans le dégagement. La seconde butée 6b se positionne sous une portée 10 encadrant le dégagement 9 (fig.6). Cette seconde butée correspond à la position d'alignement souhaitée entre les deux pièces tel que schématisé par le repère 15 à la figure 6. On précisera que pour faciliter l'usinage de la seconde butée une encoche 16 peut être ménagée sur la base annulaire 3a en regard de la seconde butée à usiner pour accéder à cette dernière.As shown in figures 3 , 6 And 7 , the second part 3 also comprises an annular base 3a partly forming a support surface intended to be in contact with the support surface 2b of the first part 2. The annular base 3a has on its inner edge a series of clearances 9 of complementary shape or of dimensions greater than the edges 4 of the first part 2 so as to allow their engagement during assembly. The inner edge of the annular base 3a is thus formed of a plurality of recesses 9 each framed by a bearing 10. These clearances 9 communicate with an annular groove 7 formed in the interior wall 3b of the second part 3 over its entire circumference. This groove 7 in turn opens onto a groove 6 occupying an annular portion of the interior wall 3b. This groove 6 is delimited by two stops 6a, 6b intended to cooperate with the lug 5 whose movement during assembly is thus limited by the stops. A first stop 6a is positioned opposite a clearance 9 to allow the assembly and disassembly of the two parts. More precisely, the first stop 6a is arranged at a minimum distance from one end of the clearance 9 ( fig.3a ) equal to half of the arc of a circle defined by the flange to allow insertion of the flange into the clearance. The second stop 6b is positioned under a span 10 framing the clearance 9 ( fig.6 ). This second stop corresponds to the desired alignment position between the two parts as shown schematically by mark 15 on the Figure 6 . It will be specified that to facilitate the machining of the second stop a notch 16 can be made on the annular base 3a opposite the second stop to be machined to access the latter.

Selon l'invention, la boîte de montre 1 comporte un joint de compression radiale 14 destiné à appliquer une force de serrage sur la première pièce et empêcher par là-même le déplacement accidentel de la première pièce par rapport à la seconde pièce. Préférentiellement, ce joint de compression radiale 14 est positionné dans le fond de la gorge annulaire 7 entre cette dernière et la première pièce 2.According to the invention, the watch case 1 comprises a radial compression joint 14 intended to apply a clamping force on the first part and thereby prevent accidental movement of the first part relative to the second part. Preferably, this radial compression seal 14 is positioned in the bottom of the annular groove 7 between the latter and the first part 2.

La boîte de montre 1 comporte en outre de manière conventionnelle plusieurs joints 12,13 qui assurent l'étanchéité entre les glaces et respectivement le fond et la carrure et entre le fond et la carrure pour l'exemple illustré. Les joints de glace 12 sont positionnés dans des gorges 17 ménagées respectivement dans la première pièce 2 et la seconde pièce 3 (fig.7). Le joint de compression axiale 13 entre la première pièce 2 et la seconde pièce 3 est positionné dans une gorge 18 ménagée dans la base annulaire 3a de la seconde pièce 3 (fig.3a et fig.7).The watch case 1 further conventionally comprises several seals 12,13 which ensure sealing between the crystals and respectively the back and the middle and between the back and the middle for the example illustrated. The ice seals 12 are positioned in grooves 17 formed respectively in the first part 2 and the second part 3 ( fig.7 ). The axial compression joint 13 between the first part 2 and the second part 3 is positioned in a groove 18 formed in the annular base 3a of the second part 3 ( fig.3a And fig.7 ).

Le procédé d'assemblage se déroule comme suit. La première pièce peut occuper par rapport à la seconde pièce une position dite de montage, une position dite de verrouillage et une position dite de démontage. Dans la position de montage (fig.8b et fig.8d), le rebord 4 muni de l'ergot 5 de la première pièce 2 est positionné en regard du dégagement 9 de la seconde pièce 3 communiquant avec la rainure 6 munie des butées 6a,6b. L'ergot 5 est positionné à proximité de la première butée 6a et vient se glisser dans la rainure 6. Avantageusement, l'ergot se positionne à quelques degrés angulaires de la première butée lors du montage afin de faciliter ce dernier. Le déplacement angulaire relatif d'un angle α entre la première pièce et la seconde pièce est réalisé à l'aide d'un outil spécial tel qu'une clef pour surmonter la force de frottement exercée par le joint de compression radiale. Ce déplacement vient positionner l'ergot 5 contre la deuxième butée 6b (fig.8a et fig.8c) et ainsi aligner la première pièce par rapport à la seconde pièce dans la position souhaitée indiquée par des repères 15 à la figure 1. La première pièce occupe ainsi par rapport à la seconde pièce la position dite de verrouillage. Les deux pièces sont immobilisées dans cette position angulaire de verrouillage grâce l'action du joint de compression radiale. De même, le déplacement axial selon l'axe A de la première pièce par rapport à la seconde pièce est empêché par le rebord de la première pièce se logeant dans la gorge sous la portée de la seconde pièce.The assembly process takes place as follows. The first part can occupy, relative to the second part, a so-called assembly position, a so-called locking position and a so-called disassembly position. In the mounting position ( fig.8b and fig.8d ), the rim 4 provided with the lug 5 of the first part 2 is positioned opposite the clearance 9 of the second part 3 communicating with the groove 6 provided with the stops 6a, 6b. The lug 5 is positioned near the first stop 6a and slides into the groove 6. Advantageously, the lug is positioned a few angular degrees from the first stop during assembly in order to facilitate the latter. The relative angular displacement of an angle α between the first part and the second part is carried out using a special tool such as a wrench to overcome the friction force exerted by the radial compression joint. This movement positions the lug 5 against the second stop 6b ( fig.8a and fig.8c ) and thus align the first part relative to the second part in the desired position indicated by marks 15 at the figure 1 . The first part thus occupies the so-called locking position in relation to the second part. The two parts are immobilized in this angular locking position thanks to the action of the radial compression joint. Likewise, the axial movement along axis A of the first part relative to the second part is prevented by the edge of the first part being housed in the groove under the bearing of the second part.

Pour le démontage réalisé également à l'aide d'une clef, l'ergot 5 se positionne contre la première butée 6a de la première pièce lors d'une rotation relative entre les deux pièces. Ainsi, la première pièce peut être désolidarisée de la seconde pièce.For dismantling also carried out using a key, the lug 5 is positioned against the first stop 6a of the first part during a relative rotation between the two parts. Thus, the first part can be separated from the second part.

LégendeLegend

  • (1) Boîte de montre(1) Watch box
  • (2) Première pièce, plus spécifiquement fond
    1. a. Base annulaire
    2. b. Surface d'appui
    3. c. Paroi
    (2) First piece, more specifically background
    1. has. Ring base
    2. b. Bearing surface
    3. vs. Wall
  • (3) Seconde pièce, plus spécifiquement carrure
    1. a. Base annulaire
    2. b. Paroi intérieure
    (3) Second part, more specifically middle part
    1. has. Ring base
    2. b. Interior wall
  • (4) Rebord(4) Ledge
  • (5) Ergot(5) Ergot
  • (6) Rainure
    1. a. Première butée
    2. b. Deuxième butée
    (6) Groove
    1. has. First stop
    2. b. Second stop
  • (7) Gorge annulaire de la seconde pièce(7) Annular groove of the second part
  • (9) Dégagement de la seconde pièce(9) Clearance of the second part
  • (10) Portée de la seconde pièce(10) Scope of the second room
  • (11) Glace(11) Ice cream
  • (12) Joint de glace(12) Ice seal
  • (13) Joint de compression axiale(13) Axial compression joint
  • (14) Joint de compression radiale(14) Radial compression seal
  • (15) Repère(15) Marker
  • (16) Encoche(16) Notch
  • (17) Gorge annulaire du joint de glace(17) Annular groove of the ice seal
  • (18) Gorge du joint de compression axiale(18) Axial compression joint groove

Claims (8)

  1. Watch case (1) whose orientation is defined with respect to a central axis A perpendicular to the plane of the watch case (1), said watch case (1) comprising a first part (2) and a second part (3) capable of adopting a so-called locking position, a so-called assembly position and a so-called disassembly position with respect to one another, the first part (2) comprising a plurality of flanges (4) distributed over its outer periphery and projecting in a direction opposite the central axis A, at least one of the flanges (4) comprising a catch (5) extending in a direction parallel to said central axis A, the second part (3) comprising on its inner periphery a plurality of recesses (9) allowing the passage of said flanges (4) in the assembly and disassembly positions, said recesses (9) opening out into a groove (7) formed over the entire periphery of an inner wall (3b) of the second part (3), said groove (7) accommodating the flanges (4) in each of the positions and in turn opening into a slot (6) formed on a portion of the periphery of the inner wall (3b) of the second part (3), said slot (6) being delimited at its ends by respectively a first stop (6a) and a second stop (6b), said slot (6) accommodating the catch (5) with the first stop (6a) limiting the movement of the catch (5) in the disassembly and assembly positions, and with the second stop (6b) limiting the movement of the catch (5) in the locking position, said watch case (1) also comprising a first compression seal (14) applying a clamping force to the first part (2) in a direction perpendicular to the central axis A in the locking position.
  2. Watch case (1) according to claim 1, characterised in that said first compression seal (14) is housed in the bottom of the groove (7) of the second part (3).
  3. Watch case (1) according to claim 1 or 2, characterised in that the first stop (6a) is arranged facing a recess (9) and in that the second stop (6b) is arranged under a span (10) framing the recess (9), said first stop (6a) being arranged at a distance from the ends of the recess (9) so as to allow passage of the flange (4) fitted with the catch (5) in the disassembly and assembly positions.
  4. Watch case (1) according to one of the preceding claims, characterised in that, in the assembly position, the catch (5) of the flange (4) is positioned at a few angular degrees from the first stop (6a).
  5. Watch case (1) according to one of the preceding claims, characterised in that it comprises a second compression seal (13) applying an axial force along the central axis A, said second compression seal (13) being housed in another groove (18) formed in a base (3a) of the second part (3).
  6. Watch case (1) according to claim 3 and one of claims 4 to 5, comprising, facing the second stop (6b), a notch (16) formed in the span (10).
  7. Watch case (1) according to one of the preceding claims, characterised in that the catch (5) and the slot (6) are rigid.
  8. Watch case (1) according to one of the preceding claims, characterised in that the clamping force on the first part (2) is only applied via the first compression seal (14).
EP21201627.3A 2021-10-08 2021-10-08 Watch case with a bayonet connection Active EP4163738B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP21201627.3A EP4163738B1 (en) 2021-10-08 2021-10-08 Watch case with a bayonet connection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21201627.3A EP4163738B1 (en) 2021-10-08 2021-10-08 Watch case with a bayonet connection

Publications (2)

Publication Number Publication Date
EP4163738A1 EP4163738A1 (en) 2023-04-12
EP4163738B1 true EP4163738B1 (en) 2024-03-20

Family

ID=78086312

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21201627.3A Active EP4163738B1 (en) 2021-10-08 2021-10-08 Watch case with a bayonet connection

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Country Link
EP (1) EP4163738B1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5920709Y2 (en) * 1979-12-17 1984-06-15 セイコーエプソン株式会社 Structure of the back cover of a portable watch case
EP2874022B1 (en) 2013-11-15 2016-10-26 Chopard Technologies SA Watch case including a bayonet connection
EP3062171B1 (en) * 2015-02-27 2017-12-13 ETA SA Manufacture Horlogère Suisse Plastic or electroformed watch case with removable crystal
FR3062218B1 (en) * 2017-01-25 2020-11-27 G&G Concept "CAPSLOCK" WATCH FASTENING

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