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EP4202569A1 - Watch case with rotating bezel - Google Patents

Watch case with rotating bezel Download PDF

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Publication number
EP4202569A1
EP4202569A1 EP21216432.1A EP21216432A EP4202569A1 EP 4202569 A1 EP4202569 A1 EP 4202569A1 EP 21216432 A EP21216432 A EP 21216432A EP 4202569 A1 EP4202569 A1 EP 4202569A1
Authority
EP
European Patent Office
Prior art keywords
watch case
alloy
rotating bezel
connecting spring
spring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP21216432.1A
Other languages
German (de)
French (fr)
Inventor
René Piguet
Marc Stranczl
Adrien Chappuis
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.)
Montres Breguet SA
Original Assignee
Montres Breguet SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Montres Breguet SA filed Critical Montres Breguet SA
Priority to EP21216432.1A priority Critical patent/EP4202569A1/en
Priority to JP2022165230A priority patent/JP7458456B2/en
Priority to US17/973,343 priority patent/US20230195037A1/en
Priority to CN202211646654.2A priority patent/CN116300368A/en
Publication of EP4202569A1 publication Critical patent/EP4202569A1/en
Pending legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B19/00—Indicating the time by visual means
    • G04B19/28—Adjustable guide marks or pointers for indicating determined points of time
    • 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
    • G04B19/00—Indicating the time by visual means
    • G04B19/28—Adjustable guide marks or pointers for indicating determined points of time
    • G04B19/283—Adjustable guide marks or pointers for indicating determined points of time on rotatable rings, i.e. bezel
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C14/00—Alloys based on titanium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C19/00—Alloys based on nickel or cobalt
    • C22C19/007—Alloys based on nickel or cobalt with a light metal (alkali metal Li, Na, K, Rb, Cs; earth alkali metal Be, Mg, Ca, Sr, Ba, Al Ga, Ge, Ti) or B, Si, Zr, Hf, Sc, Y, lanthanides, actinides, as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C9/00—Alloys based on copper
    • C22C9/01—Alloys based on copper with aluminium as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C9/00—Alloys based on copper
    • C22C9/04—Alloys based on copper with zinc as the next major constituent
    • 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
    • G04B19/00—Indicating the time by visual means
    • G04B19/28—Adjustable guide marks or pointers for indicating determined points of time
    • G04B19/283—Adjustable guide marks or pointers for indicating determined points of time on rotatable rings, i.e. bezel
    • G04B19/286—Adjustable guide marks or pointers for indicating determined points of time on rotatable rings, i.e. bezel with locking means to prevent undesired rotations in both directions
    • 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
    • G04B37/04—Mounting the clockwork in the case; Shock absorbing mountings

Definitions

  • the present invention relates to a watch case fitted with a rotating bezel, and more specifically to the nature of the spring linking the middle part to the rotating bezel.
  • This spring is formed from a generally metallic wire which is subjected to deformations during its assembly within the grooves of the middle part and of the rotating bezel. These deformations can be significant and lead to plastic deformation of the wire.
  • the figures 3 to 5 schematize the assembly process of the bezel 1 and the spring 2 on the caseband 3.
  • the spring 2 is positioned against the inclined plane 3c of the middle part 3 and is housed in the groove 8 of the bezel 1.
  • the spring is unconstrained.
  • the spring 2 is positioned against the vertical wall 3b following the inclined wall 3c of the caseband 3. It is then strongly constrained radially before releasing when it is housed in the grooves 7.8 of the caseband 3 and the bezel 1 provided for its operation ( figure 5 ).
  • the displacements applied and the corresponding stresses in the sequence of the figure 4 vary from room to room depending on manufacturing tolerances.
  • this stress is critical because it plastically deforms the spring. This implies that the repeatability of the friction torque during the rotation of the bezel and the force required for dismantling are variable from one part to another. These plastic deformations modify the friction torque between the bezel and the middle and therefore the sensory feeling perceived by the customer, which is a major disadvantage.
  • the object of the invention is to overcome the aforementioned disadvantage by proposing a spring made of a material which can be subjected to significant stresses without plastically deforming. More specifically, the spring is made of a shape memory alloy exploited for its superelastic properties. These materials allow a large displacement range without residual plastic deformation thanks to a phase transformation phenomenon. As a result, despite the large stresses and the large displacements during the insertion of the spring during assembly, the torque perceived by the user is more repeatable and independent of the geometry during the insertion of the spring.
  • the invention thus makes it possible to reduce the dimensions of the bezels by groove geometries which would be critical with traditional constructions and materials while maintaining a stable felt torque.
  • the present invention relates to a watch case comprising a rotating bezel, a middle part and a connecting spring between the rotating bezel and the middle part, said connecting spring being housed in a first groove made in an outer wall of the middle part and in a second groove made in an inner wall of the rotating bezel, said first and second grooves being arranged preferably facing each other, the watch case being characterized in that the connecting spring is made in a shape memory alloy.
  • the shape memory alloy is an alloy based on copper, an alloy based on nickel and titanium, an alloy based on nickel or an alloy based on iron.
  • the watch case 6 comprises a rotating bezel 1 mounted on the middle part 3 ( fig.1 ).
  • the caseband 3 and the rotating bezel 1 respectively comprise a groove 7 and a groove 8.
  • the groove 7 is made in the outer wall 3a of the caseband 3 and the groove 8 is made in the inner wall 1a of the rotating bezel 1.
  • grooves 7 and 8 are preferably arranged facing each other and serve as a housing for the connecting spring 2 according to the invention. Thanks to this spring 2, the rotating bezel 1 is pressed downwards against a shoulder 3d of the middle part 3.
  • the connecting spring may have a polygonal shape.
  • the connecting spring may have an annular shape with circular protrusions 2a arranged alternately on the inner face and on the outer face of the ring. Other shapes are also possible without departing from the scope of the invention.
  • the connecting spring is made of a shape memory alloy.
  • FIG 6 illustrates the superelastic behavior of a shape memory alloy which exhibits an austenitic structure at room temperature which transforms into martensite under the application of a stress, which makes it possible to deform the material reversibly by several percent.
  • the tensile curve first exhibits linear elastic behavior up to a critical stress where the martensitic transformation induces superelastic behavior with increasing strain under near constant stress. This is the plateau that we observe at the figure 6 . As soon as the stress is released, the reverse transformation from martensite to austenite takes place and the alloy returns to its original size.
  • the shape memory alloy is an alloy based on nickel and titanium.
  • This alloy is completely biocompatible and highly resistant to corrosion.
  • the nickel-titanium base alloy consists of nickel with a weight percentage between 52.5 and 63%, titanium with a weight percentage between 36.5 and 47% and possible impurities with a lower or equal percentage. at 0.5%.
  • it could be an alloy comprising 55.8% titanium, 44% nickel and any impurities with a content less than or equal to 0.2% by weight.
  • iron-based alloy for example an Fe-Mn-Si alloy. It could also be a titanium-free nickel-based alloy.

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  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Springs (AREA)

Abstract

L'invention concerne une boîte de montre (6) comprenant une lunette tournante (1), une carrure (3) et un ressort de liaison (2) entre la lunette tournante (1) et la carrure (3), ledit ressort de liaison (2) étant logé dans une première gorge (7) ménagée dans une paroi extérieure (3a) de la carrure (3) et dans une deuxième gorge (8) ménagée dans une paroi intérieure (1a) de la lunette tournante (1), lesdites première et deuxième gorges (7,8) étant de préférence agencées en regard l'une de l'autre, la boîte de montre (6) étant caractérisée en ce que le ressort de liaison (2) est réalisé dans un alliage à mémoire de forme.The invention relates to a watch case (6) comprising a rotating bezel (1), a middle part (3) and a connecting spring (2) between the rotating bezel (1) and the middle part (3), said connecting spring (2) being housed in a first groove (7) formed in an outer wall (3a) of the middle part (3) and in a second groove (8) formed in an inner wall (1a) of the rotating bezel (1), said first and second grooves (7,8) being preferably arranged facing each other, the watch case (6) being characterized in that the connecting spring (2) is made of a memory alloy of shape.

Description

Domaine technique de l'inventionTechnical field of the invention

La présente invention se rapporte à une boîte de montre munie d'une lunette tournante, et plus spécifiquement à la nature du ressort liant la carrure à la lunette tournante.The present invention relates to a watch case fitted with a rotating bezel, and more specifically to the nature of the spring linking the middle part to the rotating bezel.

Arrière-plan technologiqueTechnology background

Il est connu de monter une lunette tournante sur une carrure par l'intermédiaire d'un ressort polygonal engagé simultanément dans des gorges de la lunette et de la carrure. Le ressort maintient en position la lunette dans la direction verticale tout en lui laissant un degré de liberté en rotation. Ce ressort polygonal présente l'avantage d'être une solution à bas coût d'assemblage et permet le démontage de la lunette moyennant une force de démontage relativement élevée.It is known to mount a rotating bezel on a middle part by means of a polygonal spring engaged simultaneously in the grooves of the bezel and of the middle part. The spring holds the bezel in position in the vertical direction while leaving it a degree of freedom in rotation. This polygonal spring has the advantage of being a low assembly cost solution and allows the bezel to be disassembled with a relatively high dismantling force.

Ce ressort est formé d'un fil généralement métallique qui est soumis à des déformations lors de son assemblage au sein des gorges de la carrure et de la lunette tournante. Ces déformations peuvent être importantes et mener à une déformation plastique du fil.This spring is formed from a generally metallic wire which is subjected to deformations during its assembly within the grooves of the middle part and of the rotating bezel. These deformations can be significant and lead to plastic deformation of the wire.

A cet égard, les figures 3 à 5 schématisent le procédé d'assemblage de la lunette 1 et du ressort 2 sur la carrure 3. Au début de l'assemblage schématisé à la figure 3, le ressort 2 se positionne contre le plan incliné 3c de la carrure 3 et se loge dans la gorge 8 de la lunette 1. Lors de cette séquence d'assemblage, le ressort est non contraint. Ensuite, à la séquence d'assemblage de la figure 4, le ressort 2 se positionne contre la paroi verticale 3b à la suite de la paroi inclinée 3c de la carrure 3. Il est alors fortement contraint radialement avant de se relâcher lors de son logement dans les gorges 7,8 de la carrure 3 et de la lunette 1 prévues pour son fonctionnement (figure 5). Les déplacements appliqués et les contraintes correspondantes dans la séquence de la figure 4 varient d'une pièce à l'autre en fonction des tolérances de fabrication. Dans certains produits, cette contrainte est critique car elle déforme plastiquement le ressort. Cela implique que la répétabilité du couple de frottement lors de la rotation de la lunette et la force nécessaire au démontage sont variables d'une pièce à l'autre. Ces déformations plastiques modifient le couple de frottement entre la lunette et la carrure et donc le ressenti sensoriel perçu par le client, ce qui est un désavantage majeur.In this regard, the figures 3 to 5 schematize the assembly process of the bezel 1 and the spring 2 on the caseband 3. At the start of the assembly schematized in picture 3 , the spring 2 is positioned against the inclined plane 3c of the middle part 3 and is housed in the groove 8 of the bezel 1. During this assembly sequence, the spring is unconstrained. Then, at the assembly sequence of the figure 4 , the spring 2 is positioned against the vertical wall 3b following the inclined wall 3c of the caseband 3. It is then strongly constrained radially before releasing when it is housed in the grooves 7.8 of the caseband 3 and the bezel 1 provided for its operation ( figure 5 ). The displacements applied and the corresponding stresses in the sequence of the figure 4 vary from room to room depending on manufacturing tolerances. In some products, this stress is critical because it plastically deforms the spring. This implies that the repeatability of the friction torque during the rotation of the bezel and the force required for dismantling are variable from one part to another. These plastic deformations modify the friction torque between the bezel and the middle and therefore the sensory feeling perceived by the customer, which is a major disadvantage.

Résumé de l'inventionSummary of the invention

L'invention a pour objet de pallier au désavantage précité en proposant un ressort réalisé dans un matériau pouvant être soumis à des contraintes importantes sans se déformer plastiquement. Plus spécifiquement, le ressort est réalisé dans un alliage à mémoire de forme exploité pour ses propriétés de superélasticité. Ces matériaux autorisent une grande plage de déplacement sans déformation plastique résiduelle grâce à un phénomène de transformation de phases. Il en résulte que malgré les grandes contraintes et les grands déplacements lors de l'insertion du ressort pendant l'assemblage, le couple perçu par l'utilisateur est plus répétable et indépendant de la géométrie lors de l'insertion du ressort. L'invention permet ainsi de réduire les dimensions des lunettes par des géométries de gorges qui seraient critiques avec des constructions et matériaux traditionnels tout en conservant un couple ressenti stable.The object of the invention is to overcome the aforementioned disadvantage by proposing a spring made of a material which can be subjected to significant stresses without plastically deforming. More specifically, the spring is made of a shape memory alloy exploited for its superelastic properties. These materials allow a large displacement range without residual plastic deformation thanks to a phase transformation phenomenon. As a result, despite the large stresses and the large displacements during the insertion of the spring during assembly, the torque perceived by the user is more repeatable and independent of the geometry during the insertion of the spring. The invention thus makes it possible to reduce the dimensions of the bezels by groove geometries which would be critical with traditional constructions and materials while maintaining a stable felt torque.

Plus précisément, la présente invention se rapporte à une boîte de montre comprenant une lunette tournante, une carrure et un ressort de liaison entre la lunette tournante et la carrure, ledit ressort de liaison étant logé dans une première gorge ménagée dans une paroi extérieure de la carrure et dans une deuxième gorge ménagée dans une paroi intérieure de la lunette tournante, lesdites première et deuxième gorges étant agencées de préférence en regard l'une de l'autre, la boîte de montre étant caractérisée en ce que le ressort de liaison est réalisé dans un alliage à mémoire de forme.More specifically, the present invention relates to a watch case comprising a rotating bezel, a middle part and a connecting spring between the rotating bezel and the middle part, said connecting spring being housed in a first groove made in an outer wall of the middle part and in a second groove made in an inner wall of the rotating bezel, said first and second grooves being arranged preferably facing each other, the watch case being characterized in that the connecting spring is made in a shape memory alloy.

De préférence, l'alliage à mémoire de forme est un alliage à base de cuivre, un alliage à base de nickel et de titane, un alliage à base de nickel ou un alliage à base de fer.Preferably, the shape memory alloy is an alloy based on copper, an alloy based on nickel and titanium, an alloy based on nickel or an alloy based on iron.

D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description détaillée qui va suivre, en référence aux dessins annexés.Other characteristics and advantages of the invention will appear on reading the detailed description which follows, with reference to the appended drawings.

Brève description des figuresBrief description of figures

  • La figure 1 représente une boîte de montre munie du ressort de liaison selon l'invention.There figure 1 represents a watch case provided with the connecting spring according to the invention.
  • La figure 2 représente le ressort de liaison utilisé dans la boîte de montre selon l'invention.There picture 2 represents the connecting spring used in the watch case according to the invention.
  • Les figures 3 à 5 représentent les séquences d'assemblage du ressort au sein des gorges de la carrure et de la lunette selon l'art antérieur.THE figures 3 to 5 represent the assembly sequences of the spring within the grooves of the middle part and of the bezel according to the prior art.
  • La figure 6 représente la courbe contrainte en fonction du déplacement d'un alliage à mémoire de forme.There figure 6 represents the strain versus displacement curve of a shape memory alloy.
  • La figure 7 représente une alternative au ressort de liaison de la figure 2.There figure 7 represents an alternative to the connecting spring of the picture 2 .
Description détaillée de l'inventionDetailed description of the invention

La boîte de montre 6 comporte une lunette tournante 1 montée sur la carrure 3 (fig.1). La carrure 3 et la lunette tournante 1 comportent respectivement une gorge 7 et une gorge 8. La gorge 7 est ménagée dans la paroi extérieure 3a de la carrure 3 et la gorge 8 est ménagée dans la paroi intérieure 1a de la lunette tournante 1. Les gorges 7 et 8 sont agencées de préférence en regard l'une de l'autre et servent de logement au ressort de liaison 2 selon l'invention. Grâce à ce ressort 2, la lunette tournante 1 est pressée vers le bas contre un épaulement 3d de la carrure 3. Tel que représenté à la figure 2, le ressort de liaison peut avoir une forme polygonale. Selon une variante représentée à la figure 7, le ressort de liaison peut avoir une forme annulaire avec des protubérances circulaires 2a disposées en alternance sur la face intérieure et sur la face extérieure de l'anneau. D'autres formes sont également envisageables sans sortir du cadre de l'invention.The watch case 6 comprises a rotating bezel 1 mounted on the middle part 3 ( fig.1 ). The caseband 3 and the rotating bezel 1 respectively comprise a groove 7 and a groove 8. The groove 7 is made in the outer wall 3a of the caseband 3 and the groove 8 is made in the inner wall 1a of the rotating bezel 1. grooves 7 and 8 are preferably arranged facing each other and serve as a housing for the connecting spring 2 according to the invention. Thanks to this spring 2, the rotating bezel 1 is pressed downwards against a shoulder 3d of the middle part 3. As shown in figure 2 , the connecting spring may have a polygonal shape. According to a variant shown in figure 7 , the connecting spring may have an annular shape with circular protrusions 2a arranged alternately on the inner face and on the outer face of the ring. Other shapes are also possible without departing from the scope of the invention.

Le ressort de liaison est réalisé dans un alliage à mémoire de forme. La figure 6 illustre le comportement superélastique d'un alliage à mémoire de forme qui présente à température ambiante une structure austénitique qui se transforme en martensite sous l'application d'une contrainte, ce qui permet de déformer le matériau de façon réversible de plusieurs pourcents. La courbe de traction présente d'abord un comportement linéaire élastique jusqu'à une contrainte critique où la transformation martensitique induit un comportement superélastique avec une déformation croissante sous une contrainte quasi constante. C'est le plateau qu'on observe à la figure 6. Dès que la contrainte est relâchée, la transformation inverse de la martensite vers l'austénite s'opère et l'alliage reprend sa dimension première.The connecting spring is made of a shape memory alloy. There figure 6 illustrates the superelastic behavior of a shape memory alloy which exhibits an austenitic structure at room temperature which transforms into martensite under the application of a stress, which makes it possible to deform the material reversibly by several percent. The tensile curve first exhibits linear elastic behavior up to a critical stress where the martensitic transformation induces superelastic behavior with increasing strain under near constant stress. This is the plateau that we observe at the figure 6 . As soon as the stress is released, the reverse transformation from martensite to austenite takes place and the alloy returns to its original size.

De préférence, l'alliage à mémoire de forme est un alliage à base de nickel et de titane. Cet alliage est complètement biocompatible et très résistant à la corrosion. L'alliage à base de nickel et de titane est constitué de nickel avec un pourcentage en poids compris entre 52.5 et 63%, de titane avec un pourcentage en poids compris entre 36.5 et 47% et d'impuretés éventuelles avec un pourcentage inférieur ou égal à 0.5%. Avantageusement, il pourrait s'agir d'un alliage comportant 55.8% de titane, 44% de nickel et des impuretés éventuelles avec une teneur inférieure ou égale à 0.2% en poids.Preferably, the shape memory alloy is an alloy based on nickel and titanium. This alloy is completely biocompatible and highly resistant to corrosion. The nickel-titanium base alloy consists of nickel with a weight percentage between 52.5 and 63%, titanium with a weight percentage between 36.5 and 47% and possible impurities with a lower or equal percentage. at 0.5%. Advantageously, it could be an alloy comprising 55.8% titanium, 44% nickel and any impurities with a content less than or equal to 0.2% by weight.

Il pourrait également s'agir d'un alliage à base de cuivre. Plus spécifiquement, l'alliage à base de cuivre est un des alliages ayant la composition suivante en poids avec un pourcentage en impuretés éventuelles inférieur ou égal à 0.5% :

  • Cu entre 64.5 et 85.5%, Zn entre 9.5 et 25% et Al entre 4.5 et 10%,
  • Cu entre 79.5 et 84.5%, Al entre 12.5 et 14% et Ni entre 2.5 et 6%,
  • Cu entre 87 et 88.2%, Al entre 11 et 12% et Be entre 0.3 et 0.7%,
pour un pourcentage total de 100%.It could also be a copper-based alloy. More specifically, the copper-based alloy is one of the alloys having the following composition by weight with a percentage of possible impurities less than or equal to 0.5%:
  • Cu between 64.5 and 85.5%, Zn between 9.5 and 25% and Al between 4.5 and 10%,
  • Cu between 79.5 and 84.5%, Al between 12.5 and 14% and Ni between 2.5 and 6%,
  • Cu between 87 and 88.2%, Al between 11 and 12% and Be between 0.3 and 0.7%,
for a total percentage of 100%.

Il pourrait également s'agir d'un alliage à base de fer, par exemple un alliage Fe-Mn-Si. Il pourrait aussi s'agir d'un alliage à base de nickel sans titane.It could also be an iron-based alloy, for example an Fe-Mn-Si alloy. It could also be a titanium-free nickel-based alloy.

Ces alliages présentent à température ambiante, en l'absence de contraintes, une microstructure austénitique.These alloys exhibit at room temperature, in the absence of stresses, an austenitic microstructure.

NomenclatureNomenclature

1.1.
Lunette tournanteRotating bezel
1a.1a.
paroi intérieureinner wall
2.2.
RessortSpring
3.3.
Carrurebuild
3a.3a.
paroi extérieureouter wall
3b.3b.
paroi verticalevertical wall
3c.3c.
paroi inclinéeinclined wall
3d.3d.
épaulementshoulder
4.4.
JointSeal
5.5.
GlaceIce
6.6.
Boîte de montrewatch box
7.7.
Gorge de la carrure, aussi dite première gorgeCase middle groove, also called first groove
8.8.
Gorge de la lunette, aussi dite deuxième gorgeBezel groove, also called second groove

Claims (7)

Boîte de montre (6) comprenant une lunette tournante (1), une carrure (3) et un ressort de liaison (2) entre la lunette tournante (1) et la carrure (3), ledit ressort de liaison (2) étant logé dans une première gorge (7) ménagée dans une paroi extérieure (3a) de la carrure (3) et dans une deuxième gorge (8) ménagée dans une paroi intérieure (1a) de la lunette tournante (1), ladite boîte de montre (6) étant caractérisée en ce que le ressort de liaison (2) est réalisé dans un alliage à mémoire de forme.Watch case (6) comprising a rotating bezel (1), a middle part (3) and a connecting spring (2) between the rotating bezel (1) and the middle part (3), said connecting spring (2) being housed in a first groove (7) formed in an outer wall (3a) of the middle part (3) and in a second groove (8) formed in an inner wall (1a) of the rotating bezel (1), said watch case ( 6) being characterized in that the connecting spring (2) is made of a shape memory alloy. Boîte de montre (6) selon la revendication précédente, caractérisée en ce que l'alliage à mémoire de forme est un alliage à base de cuivre, un alliage à base de nickel, un alliage à base de nickel et de titane ou un alliage à base de fer.Watch case (6) according to the preceding claim, characterized in that the shape memory alloy is an alloy based on copper, an alloy based on nickel, an alloy based on nickel and titanium or an alloy with iron base. Boîte de montre (6) selon la revendication précédente, caractérisée en ce que l'alliage à base de nickel et de titane est constitué en poids de nickel avec un pourcentage compris entre 52.5 et 63%, de titane avec un pourcentage compris entre 36.5 et 47% et d'impuretés éventuelles avec un pourcentage inférieur ou égal à 0.5%.Watch case (6) according to the preceding claim, characterized in that the alloy based on nickel and titanium consists by weight of nickel with a percentage of between 52.5 and 63%, of titanium with a percentage of between 36.5 and 47% and any impurities with a percentage less than or equal to 0.5%. Boîte de montre (6) selon la revendication 2, caractérisée en ce que l'alliage à base de cuivre est un des alliages ayant la composition suivante en poids avec un pourcentage d'impuretés éventuelles inférieur ou égal à 0.5% : - Cu entre 64.5 et 85.5%, Zn entre 9.5 et 25% et Al entre 4.5 et 10%, - Cu entre 79.5 et 84.5%, Al entre 12.5 et 14% et Ni entre 2.5 et 6%, - Cu entre 87 et 88.2%, Al entre 11 et 12% et Be entre 0.3 et 0.7%. Watch case (6) according to Claim 2, characterized in that the copper-based alloy is one of the alloys having the following composition by weight with a percentage of possible impurities less than or equal to 0.5%: - Cu between 64.5 and 85.5%, Zn between 9.5 and 25% and Al between 4.5 and 10%, - Cu between 79.5 and 84.5%, Al between 12.5 and 14% and Ni between 2.5 and 6%, - Cu between 87 and 88.2%, Al between 11 and 12% and Be between 0.3 and 0.7%. Boîte de montre (6) selon l'une des revendications précédentes, caractérisée en ce que le ressort de liaison (2) a une forme polygonale.Watch case (6) according to one of the preceding claims, characterized in that the connecting spring (2) has a polygonal shape. Boîte de montre (6) selon l'une des revendications 1 à 4, caractérisée en ce que le ressort de liaison (2) a une forme annulaire avec des protubérances circulaires disposées en alternance sur la face intérieure et sur la face extérieure de l'anneau.Watch case (6) according to one of Claims 1 to 4, characterized in that the connecting spring (2) has an annular shape with circular protrusions arranged alternately on the inner face and on the outer face of the ring. Boîte de montre (6) selon l'une des revendications précédentes, caractérisée en ce que lesdites première et deuxième gorges (7,8) sont agencées en regard l'une de l'autre.Watch case (6) according to one of the preceding claims, characterized in that the said first and second grooves (7,8) are arranged facing each other.
EP21216432.1A 2021-12-21 2021-12-21 Watch case with rotating bezel Pending EP4202569A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP21216432.1A EP4202569A1 (en) 2021-12-21 2021-12-21 Watch case with rotating bezel
JP2022165230A JP7458456B2 (en) 2021-12-21 2022-10-14 Watch case with rotating bezel
US17/973,343 US20230195037A1 (en) 2021-12-21 2022-10-25 Watch case with rotating bezel
CN202211646654.2A CN116300368A (en) 2021-12-21 2022-12-21 Watch case with rotary bezel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21216432.1A EP4202569A1 (en) 2021-12-21 2021-12-21 Watch case with rotating bezel

Publications (1)

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EP4202569A1 true EP4202569A1 (en) 2023-06-28

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Application Number Title Priority Date Filing Date
EP21216432.1A Pending EP4202569A1 (en) 2021-12-21 2021-12-21 Watch case with rotating bezel

Country Status (4)

Country Link
US (1) US20230195037A1 (en)
EP (1) EP4202569A1 (en)
JP (1) JP7458456B2 (en)
CN (1) CN116300368A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3662537A (en) * 1968-12-10 1972-05-16 Suwa Seikosha Kk Construction of rotating bezel section for watch cases
US20130329536A1 (en) * 2012-06-06 2013-12-12 Omega Sa Rotating bezel system
CH715239B1 (en) * 2018-08-08 2021-11-30 Omega Sa Annular rotating bezel system comprising a spring ring fitted with at least two lugs.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3620444B2 (en) * 2000-12-11 2005-02-16 セイコーエプソン株式会社 clock
JP2003270365A (en) * 2002-03-14 2003-09-25 Seiko Epson Corp clock
JP4617828B2 (en) * 2004-10-29 2011-01-26 カシオ計算機株式会社 Case structure
EP2881804B1 (en) * 2013-12-09 2017-08-02 Montres Breguet S.A. Hairspring-stud assembly for timepiece
EP3483667B1 (en) * 2017-11-13 2024-10-30 Rolex Sa System for securing a clock movement in a watch case
EP3608730B1 (en) * 2018-08-08 2021-05-05 Omega SA Annular rotating bezel system comprising a spring ring provided with at least two lugs

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3662537A (en) * 1968-12-10 1972-05-16 Suwa Seikosha Kk Construction of rotating bezel section for watch cases
US20130329536A1 (en) * 2012-06-06 2013-12-12 Omega Sa Rotating bezel system
CH715239B1 (en) * 2018-08-08 2021-11-30 Omega Sa Annular rotating bezel system comprising a spring ring fitted with at least two lugs.

Also Published As

Publication number Publication date
US20230195037A1 (en) 2023-06-22
CN116300368A (en) 2023-06-23
JP7458456B2 (en) 2024-03-29
JP2023092456A (en) 2023-07-03

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