EP2835698A1 - Casing element with metallic glass cap - Google Patents
Casing element with metallic glass cap Download PDFInfo
- Publication number
- EP2835698A1 EP2835698A1 EP13179644.3A EP13179644A EP2835698A1 EP 2835698 A1 EP2835698 A1 EP 2835698A1 EP 13179644 A EP13179644 A EP 13179644A EP 2835698 A1 EP2835698 A1 EP 2835698A1
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- EP
- European Patent Office
- Prior art keywords
- cap
- element according
- cladding element
- armature
- cladding
- 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.)
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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
- G04B37/22—Materials or processes of manufacturing pocket watch or wrist watch cases
- G04B37/225—Non-metallic cases
- G04B37/226—Non-metallic cases coated with a metallic layer
Definitions
- the present invention relates to a cladding element of a timepiece comprising a frame made of a first material to which is fixed at least one cap made of a sheet of a second material, said sheet being set shape to cover at least partially said dressing element by marrying its relief.
- the patent CH-A-558 040 discloses a watch case having a protective cap extra hard material.
- the cap is held in place by screws perpendicular to the plane of the box, passing through the middle-bezel and taking in tapped studs under the cap.
- the cap has a rather complicated cross section due to the presence of threaded studs.
- the middle-bezel must be made in a special form to be adapted to the cap that surmounts it.
- the patent CH-A-517,963 ( US-A-3,242,664 ) discloses a watch case coated with a metal carbide cap made of an annular portion surrounding the ice and two diametrically opposed ears covering the attachment horns of a bracelet. The annular part and the ears are brazed respectively on the box and on the horns. This construction requires special tools to fix the cap on the watch case.
- the housing described in the patent US-A-4,396,298 contains an electronic module for displaying the time.
- This housing comprises a bottom, an elastic portion interposed between the bottom and the module and a cover.
- Elastic bars engaged in bottom edges hold the module in the bottom of the box.
- the same bars serve to fix the lid on the bottom.
- the bracelet is attached to the box by means of ears raised in the bottom. This construction is complicated and requires several pieces folded and stamped.
- the lid is not strictly speaking a cap, but rather a constituent part of the box.
- Licences CH-B-352 965 , CH-B-358 039 and DE-A-2,753,447 all describe a thin metal cap covering a middle made of plastic.
- the caseband is overmolded in a single operation inside the cap, which makes the cap unbreakable once said operation is performed.
- the cap of the present invention is put in place on a middle made apart and then fixed to this middle part.
- the patent CH-B-352 966 shows meanwhile not a cap made of metal as in the present invention, but plastic, the inner side of this cap being covered with a thin metallization.
- the outer parts of the cap, made of soft material are subject to rapid deterioration (scratches, etc.).
- the patent EP 0 351 705 describes a watch case having a middle-bezel constituting a first element of the box, an ice-glass attached to the middle-bezel and a cap completely covering the bezel and extending at least partially along the sidewall presented by the middle part, the cap constituting a second element of said box.
- the watch case is characterized by the fact that the first element is made of plastic material, that the second element is made of a metal sheet shaped to fit the relief of the bezel and the caseband it surmounts and that projections are formed on one of the elements, said projections being capable of cooperating with the other elements when the cap is put in place on the middle-bezel to ensure the attachment of said elements to each other and the fixing of said cap on said middle-bezel.
- the invention relates to a covering element which overcomes the aforementioned drawbacks of the prior art by providing a cap more resistant to shocks and deformations and whose shape perfectly matches the shape of the armature even if it is complex any by allowing possibilities of decoration.
- the object of the invention is to provide a trim element for a timepiece comprising a frame made of a first material on which at least one cap made of a sheet of a second material is attached. , said sheet being shaped to at least partially cover said covering element by marrying its relief, characterized in that said second material is an at least partially amorphous metal alloy.
- said at least one cap is made of totally amorphous material.
- the metal alloy comprises at least one element which is of the precious type, included in the list comprising gold, platinum, palladium, rhenium, ruthenium, rhodium, silver , iridium or osmium
- the covering element comprises fixing means for fixing said at least one cap to the frame.
- the fixing means comprise at least one flexible blade arranged at said cap and at least one groove arranged at the armature, said blade being provided with a hook cooperating with said groove.
- the fixing means comprise two flexible blades and two grooves.
- the fastening means comprise at least one rivet arranged on the cap and insert into at least one recess of the armature.
- said at least one rivet is formed of a pin arranged on the cap and inserted by hot forming in said at least one riveting recess.
- the fixing means comprise two rivets each inserted into a recess of the armature.
- said cap is crimped with at least one aesthetic element.
- At least one structuring is overmolded on said cap.
- said dressing element is a watch case comprising a middle part closed by a bottom and an ice, said box acting armature.
- said dressing element is a rotating bezel system comprising a bezel which serves as an armature and an indexing device using a notched element and a spring element.
- said dressing element is a bracelet link provided with a plate serving said plate having eyelets for fixing other links.
- the present invention relates to a cladding element 1 of a timepiece or watch 100 comprising a frame 2 made of a first material. On this frame 2, at least one cap 3 is fixed. This cap 3 is made of a sheet of a second material. This sheet is shaped to at least partially cover said covering element 1 by marrying its relief.
- this frame 2 is a watch case 10 like the one visible in the figure 1 .
- This watch case 10 essentially comprises a middle part 11 also serving as a bezel and also called middle-bezel, a mirror 13 attached to the middle-bezel.
- the middle-bezel 11 is made of plastic, which leads to a very cheap watch and manufactured in large series. But the feeling of cheap may just disappear if the middle-bezel 11 is dressed by the cap made according to the invention.
- the "Swatch" watch (registered trademark), known worldwide for its particular shape and its very low price, as well as for its goodness, can constitute the middle-case 11 mentioned above, middle-case 11 that would be covered with a cap 3 giving this watch a new aesthetic appearance without changing its reputation and without significantly altering its cost price.
- This cap 3 capable of covering the bezel portion 14 of the middle-bezel 11, this cap 3 extending at least partially along the sidewall presented by the middle part 15 of the middle-case 11.
- the middle-bezel comprises two pairs of horns 16 and 17 between which are articulated respectively the half-bracelets 18 and 19.
- the half-bracelet 18 is articulated around a bar 18a threaded into holes 18b made in the horns 16.
- the half-bracelet 19 is articulated around a bar 19a threaded into holes 19b made in the horns 17.
- the half bracelets 18, 19 can be replaced by a metal bracelet consisting of links and using a folding clasp system.
- the ice 13 and the middle-bezel 11 may be made of materials weldable to each other.
- the middle-bezel can, for example, be manufactured in one of the materials usually designated ABS (acryl butadiene styrene), ASA (acrylstyrene acryl-ester) or SAN (styrene acryl nitrile).
- the ice is made of a transparent acrylic resin (PMMA) commonly referred to as "plexiglass". Of course, it is possible that the ice 13 is made of sapphire.
- the second material of the cap 3 is an amorphous metal alloy. It will be understood that the term partially amorphous indicates that for a block of material, the percentage of the amount of material of said block having the amorphous state is sufficient for the block itself to have the specific characteristics of amorphous metals and metal alloys.
- the second material may also be a totally amorphous metal alloy.
- the amorphous materials have the advantage of being easily shaped.
- the precious metal or one of these alloys is included in the list comprising gold, silver, and nickel.
- the thickness of the sheet was chosen here to 0.3 mm, but other caps 5 with greater or lesser thicknesses could also be suitable.
- amorphous metal alloys are their hardness properties. Indeed, a conventional crystalline steel used in horological applications has a hardness of the order of 200-300 Vickers. However, for metal glasses, this hardness is about 600 Vickers is 2 to 3 times more than for conventional steels. Therefore, the cap 3 amorphous metal alloy will be more resistant to blows and other shocks that it will undergo a cap of the prior art. Similarly, this hardness allows superior resistance to everyday scratches and thus allows longer to keep the shine of the cap 3.
- amorphous metal alloys have an ease of shaping. Indeed, the amorphous metals have the particular characteristic of softening while remaining amorphous in a specific temperature range (T x - T g ) specific to each alloy. It is thus possible to shape them under a relatively low stress and a not too high temperature.
- One method used is the hot forming of an amorphous preform.
- This preform is obtained by melting the metal elements constituting the amorphous alloy in an oven. This fusion is done under control with the aim of obtaining a contamination of the oxygen alloy as low as possible. Once these elements are melted, they are cast as a semi product and then cooled rapidly to maintain the amorphous state.
- the hot forming is performed in order to obtain a final piece. This hot forming is performed by pressing between two matrices in a temperature range between T g and T x for a predetermined time to maintain a totally or partially amorphous structure. This is done in order to maintain the characteristic elastic properties of the amorphous metals.
- This process consists in molding the alloy obtained by melting the metal elements in an oven, in the form of any part such as a bar and that in a crystalline or amorphous state, it does not matter. Then this piece of any form of alloy is melted again to be injected into a mold having the shape of the final piece. Once the mold is filled, it is rapidly cooled to a temperature below T g in order to avoid crystallization of the alloy and thus obtain a cap 3 of amorphous or semi-amorphous metal alloy.
- cap 3 amorphous metal alloy allows to have a frame 2 having complex shapes without this being a problem for the realization of said cap 3.
- having a cap 3 amorphous metal alloy also allows to have a cap 3 easily decorated.
- the shaping facilities of the amorphous metal alloy make it possible to easily decorate said cap 3.
- An unrepresented example of decoration consists of a structuring of the surface for example to obtain a beaded effect or Cote de Genève or nails. Paris.
- the replication properties of amorphous metal alloys are used.
- the negatives of the desired structures are made on the walls of the dies used for hot forming. Therefore, during the hot forming operation, the viscosity of the amorphous metal alloy causes a perfect impression of these structures at the level of the amorphous metal alloy.
- One advantage is that the operation of producing the cap 3 and the structuring operation of the surface of the cap 3 are done simultaneously.
- FIG. 2 Another example of visible decoration at the figure 2 consists in crimping one or more decorative or aesthetic elements.
- These decorative elements 20 are, for example, precious stones such as diamonds or zircons or rubies, but also ceramic or glass elements.
- a hot crimping operation can be used. For this, the cap 3 is heated locally to the place where said aesthetic element 20 is to be inserted, at a temperature between Tg and Tx. Once the place has been warmed up, the decorative element 20 is pressed into the cap 3 of amorphous metal alloy. During the cooling of the amorphous metal alloy, the aesthetic element is trapped.
- the decorative element is heated to a temperature greater than Tg and then pressed into the cap 3.
- the heat released by the decorative element 20 locally heats the cap 3 to a temperature above Tg facilitating insertion.
- the aesthetic element is trapped.
- each material is characterized by its Young's modulus E also called modulus of elasticity (generally expressed in GPa), characterizing its resistance to deformation.
- each material is also characterized by its elastic limit ⁇ e (generally expressed in GPa) which represents the stress beyond which the material plastically deforms.
- the crystalline materials as used in the prior art for example, the Cu-Be alloy, whose Young's modulus E is equal to 130 GPa and having a yield strength ⁇ e typically equal to 1 GPa, gives a low ⁇ e / E ratio, that is to say the order of 0.007.
- These crystalline alloy caps have, therefore, limited elastic deformation.
- the ratio ⁇ e / E is increased by raising the elastic limit ⁇ e.
- the material sees the stress, beyond which it does not return to its original shape, increase. This improvement of the ratio ⁇ e / E then allows a larger deformation.
- fixing means 30 arranged at the level of the covering element 1.
- These fixing means 30 comprise at least one flexible blade 31 extending from the cap 3 and having at its end a free hook 32.
- This hook 32 is arranged to cooperate with a groove 33 located on the frame 2.
- the fastening means 30 comprise two flexible blades 31 each cooperating with a groove 33 of the frame 2.
- the fastening means 30 are in the form of rivets 37.
- the fastening means 30 are arranged so that the armature 2 is provided with at least one riveting recess 35 and preferably at least two riveting recesses.
- the cap 3 is made so as to have pins 36 or surplus material serving as rivets 37. These pins 36 are arranged on the outer surface of the cap 3. These pins 36 are arranged on the cap 3 so that when it is placed on the frame 2, the locations of the pins 36 and riveting recesses 35 are combined. It is understood that the number of pins 36 is identical to the number of riveting recesses 35.
- hot forming is used and visible to Figures 5a to 5c .
- This operation consists in locally heating the pins 36 of amorphous metal alloy with a tool 200 to a temperature between T g and T x so that the amorphous metal of the nipples 36 soften and become viscous. Then, it is sufficient to exert pressure on the nipples 36 with a tool 300 so that the amorphous metal alloy is inserted into the riveting recesses 35. After cooling, the amorphous metal alloy in the riveting recesses 35 solidifies while maintaining an amorphous state and the cap 3 is then attached to said frame 2.
- An advantage of this alternative is that it is invisible to the user of the trim element 1, the attachment is not visible.
- the frame 2 comprises several caps 3 as visible in the figure 6 it is preferably provided at least two pins 36 per cap 3.
- the riveting recesses 25 can extend in different directions. Indeed, depending on the nature of the cap 3, if the riveting recesses 35 extend in the same direction, there is a risk that the cap 3 can be removed easily from the frame 2. With 35 riveting recesses extending in different directions, for example diverging, a retaining of the cap 3 is automatic. Likewise, complex shapes for the riveting recesses 35 may allow a better grip of the cap 3 on the frame 2.
- the covering element 2 is a telescope 41 of a rotating bezel system 40 of a timepiece.
- a system 40 actually comprises a telescope 41 which serves as a frame 2 and which is mounted on the periphery of the lens 13.
- An indexing device 42 using a notched element 43 and a spring element 44 allows the bezel 41 to to be mobile, that is to say to be able to rotate.
- a rotating bezel system 40 includes an annular rotating bezel 41 having an upper face and a lower face, the upper face being the face visible by the user.
- This bezel 41 comprises, on its lower surface, a notch or toothing 44.
- the rotating bezel system 40 further comprises a spring means 43.
- This spring means 43 is inserted between the bezel 40 and the middle part 11 of the timepiece 100 when the bezel 41 is mounted forcibly on the middle part 11.
- This spring means 43 is in the form of a flat ring comprising, on its face facing the notch 44 of the bezel 41, lamellae. These slats are arranged to have an inclination between 0 and 90 ° relative to the plane of the flat ring.
- These slats have a certain elasticity so that the spring means 43 act on the bezel 41 to exert a vertical force which tends to push the bezel 41 out of the middle part 11 of the timepiece 100. These slats also serve to cooperate with the notching of the bezel 41.
- the upper face of the bezel 41 serving as a frame 2 may be provided with a cap 3 giving a more rewarding appearance.
- the cap 3 may cover the entire upper face of the bezel 41 as visible in FIG. figure 7 .
- the covering element 2 is a bracelet composed of a multitude of links 50 hinged together.
- This bracelet comprises two parts each consisting of a plurality of links. The two parts are interconnected by a folding clasp system and each comprise a terminal link 50.
- This terminal link 50 is used to fix said strap part to the box 10 of the timepiece 100.
- Each link 50 is then composed of a plate 51 acting as reinforcement.
- This plate is rectangular and has a first face 52 extending in the direction of the length and a second face 53, parallel to the first face.
- the armature 2 also comprises two lateral faces 54 parallel to each other and perpendicular to the first 52 and second 53 faces.
- first face 52 On the first face 52, two eyelets 55 are arranged and drilled with holes 56 passing through so as to be coaxial.
- a eyelet 56 On the second face 53, a eyelet 56 is arranged.
- the eyelet 55 of the second face 53 is also pierced.
- the eyelets 55 of the first 52 and the second face 53 are configured to allow two links 50 to be attached together.
- the eyelets 55 of the first face 52 are located at the ends thereof so as to create a space between them. This space allows the attachment with a second link 50, the eyelet 55 of the second face 53 of the second link 50 inserted between the eyelets 55 of the first face 52 of the first link 50.
- a frame 2 in a cheap material on which is fixed at least one cap 3.
- This cap 3 allows to hide the visible surfaces of the link 50 by marrying shapes.
- the cap 3 is then made to present zones 31 whose shape corresponds to that of the eyelets 55. It can be provided that the surface of the link 50 in contact with the arm of the user is not hidden by the cap 3.
- cap 3 or caps 3 all the surfaces can be hidden by one or three caps 3 as visible in FIG. figure 8 .
- the fixing methods of the cap 3 or caps 3 are those explained previously. In this case, the presence of the cap 3 or caps 3 is provided during the design of said armature 2 so that the dimensions of the cap or caps 3 are taken into account in the dimensions of the frame 2.
- the link 50 may also be in the form of a plate comprising ends wound on themselves to form eyelets or hinges for fixing the links 50 between them.
- the cap or caps 3 can be fixed by gluing.
- the or caps 3 can be painted.
Abstract
La présente invention concerne un élément d'habillage (1) d'une pièce d'horlogerie (100) comprenant une armature (2) réalisée en un premier matériau sur laquelle est fixée au moins une coiffe (3) faite d'une feuille d'un second matériau, ladite feuille étant mise en forme pour recouvrir au moins partiellement ledit élément d'habillage en épousant son relief.The present invention relates to a covering element (1) of a timepiece (100) comprising an armature (2) made of a first material to which is fixed at least one cap (3) made of a sheet of a second material, said sheet being shaped to at least partially cover said covering element by marrying its relief.
Description
La présente invention est relative à un élément d'habillage d'une pièce d'horlogerie comprenant une armature réalisée en un premier matériau sur laquelle est fixée au moins une coiffe faite d'une feuille d'un second matériau, ladite feuille étant mise en forme pour recouvrir au moins partiellement ledit élément d'habillage en épousant son relief.The present invention relates to a cladding element of a timepiece comprising a frame made of a first material to which is fixed at least one cap made of a sheet of a second material, said sheet being set shape to cover at least partially said dressing element by marrying its relief.
On a souvent proposé une boîte de montre recouverte par une coiffe.It has often been proposed a watch case covered by a cap.
Le brevet
Le brevet
Le boîtier décrit dans le brevet
Les brevets
Le brevet
Le brevet
L'invention concerne un élément d'habillage qui pallie les inconvénients susmentionnés de l'art antérieur en proposant une coiffe plus résistantes aux chocs et aux déformations et dont la forme épouse parfaitement la forme de l'armature même si celle-ci est complexe tout en permettant des possibilités de décoration.The invention relates to a covering element which overcomes the aforementioned drawbacks of the prior art by providing a cap more resistant to shocks and deformations and whose shape perfectly matches the shape of the armature even if it is complex any by allowing possibilities of decoration.
A cet effet, l'invention a pour but de fournir un élément d'habillage d'une pièce d'horlogerie comprenant une armature réalisée en un premier matériau sur laquelle est fixée au moins une coiffe faite d'une feuille d'un second matériau, ladite feuille étant mise en forme pour recouvrir au moins partiellement ledit élément d'habillage en épousant son relief, caractérisé en ce que ledit second matériau est un alliage métallique au moins partiellement amorphe.For this purpose, the object of the invention is to provide a trim element for a timepiece comprising a frame made of a first material on which at least one cap made of a sheet of a second material is attached. , said sheet being shaped to at least partially cover said covering element by marrying its relief, characterized in that said second material is an at least partially amorphous metal alloy.
Dans un mode de réalisation avantageux, ladite au moins une coiffe est réalisée en matériau totalement amorphe.In an advantageous embodiment, said at least one cap is made of totally amorphous material.
Dans un second mode de réalisation avantageux, l'alliage métallique comporte au moins un élément qui est du type précieux, compris dans la liste comportant l'or, le platine, le palladium, le rhénium, le ruthénium, le rhodium, l'argent, l'iridium ou l'osmiumIn a second advantageous embodiment, the metal alloy comprises at least one element which is of the precious type, included in the list comprising gold, platinum, palladium, rhenium, ruthenium, rhodium, silver , iridium or osmium
Dans un troisième mode de réalisation avantageux, l'élément d'habillage comprend des moyens de fixation pour fixer ladite au moins une coiffe à l'armature.In a third advantageous embodiment, the covering element comprises fixing means for fixing said at least one cap to the frame.
Dans un quatrième mode de réalisation avantageux, les moyens de fixation comprennent au moins une lame flexible agencé au niveau de ladite coiffe et au moins une gorge agencée au niveau de l'armature, ladite lame étant munie d'un crochent coopèrent avec ladite gorge.In a fourth advantageous embodiment, the fixing means comprise at least one flexible blade arranged at said cap and at least one groove arranged at the armature, said blade being provided with a hook cooperating with said groove.
Dans un autre mode de réalisation avantageux, les moyens de fixation comprennent deux lames flexibles et deux gorges.In another advantageous embodiment, the fixing means comprise two flexible blades and two grooves.
Dans un autre mode de réalisation avantageux, les moyens de fixation comprennent au moins un rivet agencé sur la coiffe et insérer dans au moins un évidement de l'armature.In another advantageous embodiment, the fastening means comprise at least one rivet arranged on the cap and insert into at least one recess of the armature.
Dans un autre mode de réalisation avantageux, ledit au moins un rivet est formé d'un téton agencé sur la coiffe et inséré par formage à chaud dans ledit au moins un évidement de rivetage.In another advantageous embodiment, said at least one rivet is formed of a pin arranged on the cap and inserted by hot forming in said at least one riveting recess.
Dans un autre mode de réalisation avantageux, les moyens de fixation comprennent deux rivets insérés chacun dans un évidement de l'armature.In another advantageous embodiment, the fixing means comprise two rivets each inserted into a recess of the armature.
Dans un autre mode de réalisation avantageux, ladite coiffe est sertie avec au moins un élément esthétique.In another advantageous embodiment, said cap is crimped with at least one aesthetic element.
Dans un autre mode de réalisation avantageux, au moins une structuration est surmoulée sur ladite coiffe.In another advantageous embodiment, at least one structuring is overmolded on said cap.
Dans un autre mode de réalisation avantageux, ledit élément d'habillage est une boite de montre comprenant une carrure fermée par un fond et une glace, ladite boite faisant office d'armature.In another advantageous embodiment, said dressing element is a watch case comprising a middle part closed by a bottom and an ice, said box acting armature.
Dans un autre mode de réalisation avantageux, ledit élément d'habillage est un système de lunette tournante comprenant une lunette qui sert d'armature et un dispositif d'indexation utilisant un élément cranté et un élément ressort.In another advantageous embodiment, said dressing element is a rotating bezel system comprising a bezel which serves as an armature and an indexing device using a notched element and a spring element.
Dans un autre mode de réalisation avantageux, ledit élément d'habillage est un maillon de bracelet muni d'une plaque faisant office d'armature ladite plaque présentant des oeillets pour la fixation d'autres maillons.In another advantageous embodiment, said dressing element is a bracelet link provided with a plate serving said plate having eyelets for fixing other links.
Les avantages d'un tel élément d'habillage apparaîtront clairement à la lecture de la description qui va suivre et à l'examen du dessin qui l'illustre à titre d'exemple et dans lequel :
- la
figure 1 représente de manière schématique une pièce d'horlogerie comprenant une boite comme élément d'habillage munie d'une coiffe selon la présente invention ; - la
figure 2 représente de manière schématique une vue en coupe d'un élément d'habillage avec une coiffe sertie ; - les
figures 3 et 4 représentent de manière schématique une vue en coupe des moyens de fixation de la coiffe à l'élément d'habillage; - les
figures 5a à 5c représentent de manière schématique les étapes d'une méthode de fixation de la coiffe ; - la
figure 6 représente de manière schématique une vue en coupe d'un élément d'habillage muni de plusieurs coiffes; - la
figure 7 représente de manière schématique une lunette comme élément d'habillage munie d'une coiffe selon la présente invention ; - la
figure 8 représente de manière schématique un maillon de bracelet comme élément d'habillage munie d'une coiffe selon la présente invention.
- the
figure 1 schematically represents a timepiece comprising a box as a covering element provided with a cap according to the present invention; - the
figure 2 schematically represents a sectional view of a cladding element with a crimped cap; - the
Figures 3 and 4 schematically represent a sectional view of the fastening means of the cap to the covering element; - the
Figures 5a to 5c schematically represent the steps of a method of fastening the cap; - the
figure 6 schematically shows a sectional view of a cladding element provided with a plurality of caps; - the
figure 7 schematically shows a bezel as a covering element provided with a cap according to the present invention; - the
figure 8 schematically represents a bracelet link as a covering element provided with a cap according to the present invention.
La présente invention concerne un élément d'habillage 1 d'une pièce d'horlogerie ou montre 100 comprenant une armature 2 réalisée en un premier matériau. Sur cette armature 2, au moins une coiffe 3 est fixée. Cette coiffe 3 est faite d'une feuille d'un second matériau. Cette feuille est mise en forme pour recouvrir au moins partiellement ledit élément d'habillage 1 en épousant son relief.The present invention relates to a
Dans un premier mode de réalisation visible à la
Cette coiffe 3 susceptible de recouvrir la partie lunette 14 de la carrure-lunette 11, cette coiffe 3 s'étendant au moins partiellement le long du flanc présenté par la partie carrure 15 de la carrure-lunette 11. Sur la
La glace 13 et la carrure-lunette 11 peuvent être réalisées en des matériaux soudables l'un à l'autre. La carrure-lunette peut, par exemple, être fabriquée en l'un des matériaux désignés habituellement par ABS (acryl butadiène styrène), ASA (acrylstyrène acryl-ester) ou SAN (styrène acryl nitrile). La glace est réalisée en une résine transparente acrylique (PMMA) communément désignée sous la marque déposée "plexiglass". Bien entendu, il est possible que la glace 13 soit réalisée en saphir.The
Selon une caractéristique de l'invention, le second matériau de la coiffe 3 est un alliage métallique amorphe. On comprendra que le terme partiellement amorphe indique que pour un bloc de matière, le pourcentage de quantité de matière dudit bloc présentant l'état amorphe est suffisant pour que le bloc en lui-même présente les caractéristiques spécifiques aux métaux et alliages métalliques amorphes. Le second matériau peut également être un alliage métallique totalement amorphe. Les matériaux amorphes ont l'avantage de pouvoir être facilement mis en forme. De même, il peut être possible d'utiliser un métal précieux ou un de ces alliages afin de donner un caractère noble à la coiffe 3. Ainsi, le métal précieux ou un de ces alliages est compris dans la liste comportant l'or, le platine, le palladium, le rhénium, le ruthénium, le rhodium, l'argent, l'iridium ou l'osmium. Dans le reste de la description, les termes verre métallique, métal amorphe et alliage métallique amorphe pourront être utilisés car ayant la même signification.According to one characteristic of the invention, the second material of the
L'épaisseur de la feuille a été choisie ici à 0,3 mm, mais d'autres coiffes 5 avec des épaisseurs en plus ou moins importantes pourraient aussi convenir.The thickness of the sheet was chosen here to 0.3 mm, but other caps 5 with greater or lesser thicknesses could also be suitable.
Un avantage de ces alliages métalliques amorphes est leur propriétés de dureté. En effet, un acier classique cristallin utilisé dans les applications horlogères présente une dureté de l'ordre de 200-300 Vickers. Or, pour les verres métalliques, cette dureté est d'environ 600 Vickers soit 2 à 3 fois plus que pour les aciers classiques. Par conséquent, la coiffe 3 en alliage métallique amorphe sera plus résistante aux coups et autres chocs qu'elle subira qu'une coiffe de l'art antérieur. De même, cette dureté permet une résistance supérieure aux rayures du quotidien et permet ainsi de garder plus longtemps l'éclat de la coiffe 3.An advantage of these amorphous metal alloys is their hardness properties. Indeed, a conventional crystalline steel used in horological applications has a hardness of the order of 200-300 Vickers. However, for metal glasses, this hardness is about 600 Vickers is 2 to 3 times more than for conventional steels. Therefore, the
Un autre avantage des alliages métalliques amorphes est qu'ils possèdent une facilité de mise en forme. En effet, les métaux amorphes ont la caractéristique particulière de se ramollir tout en restant amorphe dans un intervalle de température (Tx - Tg) donné propre à chaque alliage. Il est ainsi possible de les mettre en forme sous une contrainte relativement faible et à une température pas trop élevée.Another advantage of amorphous metal alloys is that they have an ease of shaping. Indeed, the amorphous metals have the particular characteristic of softening while remaining amorphous in a specific temperature range (T x - T g ) specific to each alloy. It is thus possible to shape them under a relatively low stress and a not too high temperature.
Un procédé utilisé est le formage à chaud d'une préforme amorphe. Cette préforme est obtenue par fusion des éléments métalliques constituant l'alliage amorphe dans un four. Cette fusion est faite sous contrôle avec pour but d'obtenir une contamination de l'alliage en oxygène aussi faible que possible. Une fois ces éléments fondus, ils sont coulés sous forme de semi produit puis refroidis rapidement afin de conserver l'état amorphe. Une fois la préforme réalisée, le formage à chaud est réalisé dans le but d'obtenir une pièce définitive. Ce formage à chaud est réalisé par pressage entre deux matrices dans une gamme de température comprise entre Tg et Tx durant un temps déterminé pour conserver une structure totalement ou partiellement amorphe. Ceci est fait dans le but de conserver les propriétés élastiques caractéristiques des métaux amorphes.One method used is the hot forming of an amorphous preform. This preform is obtained by melting the metal elements constituting the amorphous alloy in an oven. This fusion is done under control with the aim of obtaining a contamination of the oxygen alloy as low as possible. Once these elements are melted, they are cast as a semi product and then cooled rapidly to maintain the amorphous state. Once the preform is made, the hot forming is performed in order to obtain a final piece. This hot forming is performed by pressing between two matrices in a temperature range between T g and T x for a predetermined time to maintain a totally or partially amorphous structure. This is done in order to maintain the characteristic elastic properties of the amorphous metals.
Bien entendu, d'autres types de mise en forme sont possibles comme la mise en forme par injection. Ce procédé consiste à mouler l'alliage obtenu par fusion des éléments métalliques dans un four, sous la forme d'une pièce quelconque telle qu'un barreau et cela dans un état cristallin ou amorphe, peu importe. Puis cette pièce de forme quelconque en alliage est de nouveau fondue pour être injectée dans un moule possédant la forme de la pièce définitive. Une fois le moule rempli, celui-ci est refroidi rapidement jusqu'à une température inférieure à Tg afin d'éviter la cristallisation de l'alliage et ainsi obtenir une coiffe 3 en alliage métallique amorphe ou semi-amorphe.Of course, other types of formatting are possible, such as injection shaping. This process consists in molding the alloy obtained by melting the metal elements in an oven, in the form of any part such as a bar and that in a crystalline or amorphous state, it does not matter. Then this piece of any form of alloy is melted again to be injected into a mold having the shape of the final piece. Once the mold is filled, it is rapidly cooled to a temperature below T g in order to avoid crystallization of the alloy and thus obtain a
Ainsi, le fait d'avoir une coiffe 3 en alliage métallique amorphe permet d'avoir une armature 2 présentant des formes complexes sans que cela ne soit un problème pour la réalisation de ladite coiffe 3.Thus, having a
De plus, avoir une coiffe 3 en alliage métallique amorphe permet également d'avoir une coiffe 3 facilement décorable. En effet, les facilités de mise en forme de l'alliage métallique amorphe permettent de décorer facilement ladite coiffe 3. Un exemple non représenté de décoration consiste en une structuration de la surface par exemple pour obtenir un effet perlé ou Cote de Genève ou Clous de paris. Pour cela, les propriété de réplication des alliages métalliques amorphes sont utilisées. Les négatifs des structurations désirées sont réalisées sur les parois des matrices utilisées pour le formage à chaud. Par conséquent, lors de l'opération de formage à chaud, la viscosité de l'alliage métallique amorphe entraîne une parfaite impression de ces structurations au niveau de l'alliage métallique amorphe. Un avantage est que l'opération de réalisation de la coiffe 3 et l'opération de structuration de la surface de la coiffe 3 se font simultanément.In addition, having a
Un autre exemple de décoration visible à la
Dans une variante, l'élément décoratif est chauffé à une température supérieure à Tg puis presser dans la coiffe 3. La chaleur dégagée par l'élément décoratif 20 chauffe localement la coiffe 3 jusqu'à une température supérieure à Tg facilitant l'insertion. Lors du refroidissement de l'alliage métallique amorphe, l'élément esthétique se retrouve prisonnier.In a variant, the decorative element is heated to a temperature greater than Tg and then pressed into the
Pour fixer ladite coiffe à l'armature, plusieurs méthodes utilisant les propriétés des alliages métalliques amorphes sont envisageables.To fix said cap to the armature, several methods using the properties of amorphous metal alloys are conceivable.
Dans une première alternative visible à la
Par conséquent, cette élasticité permet d'avoir des moyens de fixation 30 agencés au niveau de l'élément d'habillage 1. Ces moyens de fixation 30 comprennent au moins une lame flexible 31 s'étendant depuis la coiffe 3 et présentant à son extrémité libre un crochet 32. Ce crochet 32 est agencé pour coopérer avec une gorge 33 située sur l'armature 2. Préférentiellement, les moyens de fixation 30 comprennent deux lames 31 flexibles coopérant chacune avec une gorge 33 de l'armature 2.Therefore, this elasticity makes it possible to have fixing means 30 arranged at the level of the
Lors de la fixation de la coiffe 3 à ladite armature 2, les lames flexibles 31 des moyens de fixation 30 subissent une contrainte de sorte qu'elles se déforment. Cette déformation consiste en un écartement des lames flexibles 31 par rapport à leur position de repos. Lorsque le crochet 32 de chaque lame flexible 31 se trouve en regard de la gorge 33 avec laquelle il doit et les lames flexibles 31 reprennent leur position de repos tout en fixant la coiffe 3 à l'armature 2.When fixing the
Par ailleurs, cette élasticité supérieure des alliages métalliques amorphes permet de pouvoir enlever la coiffe 3. En effet, pour enlever la coiffe, une déformation des lames flexibles pour enlever les crochets 32 des gorge 33 est nécessaire. Or, avec métal cristallin, la plus faible limite élastique entraîne un risque accru de déformation permanente ou plastique des lames flexibles 31. Il devient donc impossible de refixer la coiffe 3 sauf à exercer des contraintes mécaniques pour replacer les lames flexibles 31 dans une position de repos adéquate. Toutefois, une fois les lames 31 déformées plastiquement, il est difficile de retrouver la forme originelle.Furthermore, this higher elasticity of the amorphous metal alloys makes it possible to remove the
Par contre, avec un alliage métallique amorphe présentant une limite élastique plus importante, les risques de déformation plastique durant l'opération de désolidarisation de la coiffe 3. Effectivement, comme la limite élastique est plus importante, la contrainte que les lames flexibles 31 peuvent subir est plus grande.On the other hand, with an amorphous metal alloy having a larger elastic limit, the risk of plastic deformation during the uncoupling operation of the
Dans une seconde alternative visible à la
Pour effectuer le rivetage, le formage à chaud est utilisé et visible aux
Dans le cas où l'armature 2 comprendre plusieurs coiffes 3 comme visible à la
En règle général, il sera également prévu que les évidements de rivetage 25 puissent s'étendre selon des directions différentes. En effet, selon la nature de la coiffe 3, si les évidements de rivetage 35 s'étendent dans la même direction, il existe un risque que la coiffe 3 puisse être démontée facilement de l'armature 2. Avec des évidements de rivetage 35 s'étendant dans des directions différentes, par exemple en divergeant, une retenue de la coiffe 3 est automatique. De même, des formes complexes pour les évidements de rivetage 35 peuvent permettre une meilleure accroche de la coiffe 3 sur l'armature 2.As a general rule, it will also be provided that the riveting recesses 25 can extend in different directions. Indeed, depending on the nature of the
Dans un second mode de réalisation visible à la
Par exemple, un système de lunette tournante 40 comprend une lunette tournante annulaire 41 possédant une face supérieure et une face inférieure, la face supérieure étant la face visible par l'utilisateur. Cette lunette 41 comprend, sur sa surface inférieure, un crantage ou denture 44. Le système de lunette tournante 40 comprend en outre un moyen ressort 43. Ce moyen ressort 43 est inséré entre la lunette 40 et la carrure 11 de la pièce d'horlogerie 100 lorsque la lunette 41 est montée à force sur la carrure 11. Ce moyen ressort 43 se présente sous la forme d'un anneau plat comprenant, sur sa face en regard du crantage 44 de la lunette 41, des lamelles. Ces lamelles sont disposées pour présenter une inclinaison entre 0 et 90° par rapport au plan de l'anneau plat. Ces lamelles présentent une certaine élasticité de sorte que les moyens ressort 43 agissent sur la lunette 41 pour exercer une force verticale qui tend à pousser la lunette 41 hors de la carrure 11 de la pièce d'horlogerie 100. Ces lamelles servent également à coopérer avec le crantage de la lunette 41.For example, a
La face supérieure de la lunette 41, servant d'armature 2, peut être munie d'une coiffe 3 donnant un aspect plus valorisant. Pour cela, la coiffe 3 peut recouvrir la totalité de face supérieure de la lunette 41 comme visible à la
Dans un troisième mode de réalisation visible à la
Chaque maillon 50 est alors composé d'une plaque 51 faisant office d'armature. Cette plaque est rectangulaire et présente une première face 52 s'étendant dans le sens de la longueur et une seconde face 53, parallèle à la première face. L'armature 2 comprend également deux faces latérales 54 parallèles entre elles et perpendiculaires aux première 52 et seconde 53 faces.Each
Sur la première face 52, deux oeillets 55 sont agencés et percés de trous 56 traversant de sorte à être coaxiaux. Sur la seconde face 53, un oeillet 56 est agencé. L'oeillet 55 de la seconde face 53 est également percé. Les oeillets 55 de la première 52 et de la seconde 53 face sont configurés pour permettre d'attacher deux maillons 50 ensemble. Pour cela, les oeillets 55 de la première face 52 sont situés aux extrémités de celle-ci de sorte à créer un espace entre eux. Cet espace permet la fixation avec un second maillon 50, l'oeillet 55 de la seconde face 53 du second maillon 50 s'insérant entre les oeillets 55 de la première face 52 du premier maillon 50.On the
Afin de diminuer les coûts sans diminuer l'attrait esthétique, il est envisageable d'avoir une armature 2 dans un matériau bon marché sur laquelle est fixée au moins une coiffe 3. Cette coiffe 3 permet de cacher les surfaces visibles du maillon 50 en épousant des formes. La coiffe 3 est alors réalisée pour présenter des zones 31 dont la forme correspond à celle des oeillets 55. Il peut être prévu que la surface du maillon 50 en contact avec le bras de l'utilisateur ne soit pas cachée par la coiffe 3.In order to reduce the costs without diminishing the aesthetic appeal, it is conceivable to have a
Néanmoins, toutes les surfaces peuvent être cachées par une ou des coiffes 3 comme visible à la
Le maillon 50 peut également se présenter sous la forme d'une plaque comprenant des extrémités enroulés sur elles-mêmes pour former des oeillets ou gonds pour la fixation des maillons 50 entre eux.The
On comprendra que diverses modifications et/ou améliorations et/ou combinaisons évidentes pour l'homme du métier peuvent être apportées aux différents modes de réalisation de l'invention exposée ci-dessus sans sortir du cadre de l'invention définie par les revendications annexées. Par exemple, la ou les coiffes 3 peuvent être fixées par collage. De même, la ou les coiffes 3 peuvent être peintes.It will be understood that various modifications and / or improvements and / or combinations obvious to those skilled in the art can be made to the various embodiments of the invention set out above without departing from the scope of the invention defined by the appended claims. For example, the cap or
Claims (14)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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EP13179644.3A EP2835698A1 (en) | 2013-08-07 | 2013-08-07 | Casing element with metallic glass cap |
PCT/EP2014/066402 WO2015018718A1 (en) | 2013-08-07 | 2014-07-30 | Exterior casing element and a cap made of metallic glass |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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EP13179644.3A EP2835698A1 (en) | 2013-08-07 | 2013-08-07 | Casing element with metallic glass cap |
Publications (1)
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EP2835698A1 true EP2835698A1 (en) | 2015-02-11 |
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EP13179644.3A Withdrawn EP2835698A1 (en) | 2013-08-07 | 2013-08-07 | Casing element with metallic glass cap |
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WO (1) | WO2015018718A1 (en) |
Cited By (2)
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EP3120954A1 (en) * | 2015-07-24 | 2017-01-25 | The Swatch Group Research and Development Ltd. | Method for coating a part |
EP3170579A1 (en) * | 2015-11-18 | 2017-05-24 | The Swatch Group Research and Development Ltd. | Method for manufacturing a part from amorphous metal |
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