EP3420839B1 - Clasp for wristwatch - Google Patents
Clasp for wristwatch Download PDFInfo
- Publication number
- EP3420839B1 EP3420839B1 EP17177805.3A EP17177805A EP3420839B1 EP 3420839 B1 EP3420839 B1 EP 3420839B1 EP 17177805 A EP17177805 A EP 17177805A EP 3420839 B1 EP3420839 B1 EP 3420839B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- clasp
- movable blade
- blade
- parts
- articulation
- 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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Links
- 210000000707 wrist Anatomy 0.000 claims description 41
- 229910001000 nickel titanium Inorganic materials 0.000 claims description 6
- 230000005489 elastic deformation Effects 0.000 claims description 5
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- HLXZNVUGXRDIFK-UHFFFAOYSA-N nickel titanium Chemical compound [Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni] HLXZNVUGXRDIFK-UHFFFAOYSA-N 0.000 claims description 3
- 230000002829 reductive effect Effects 0.000 claims description 3
- 210000003414 extremity Anatomy 0.000 claims 4
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 230000001747 exhibiting effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 description 7
- 210000003739 neck Anatomy 0.000 description 5
- 230000001965 increasing effect Effects 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000008094 contradictory effect Effects 0.000 description 2
- 230000009189 diving Effects 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 238000005381 potential energy Methods 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 210000003813 thumb Anatomy 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 230000021542 voluntary musculoskeletal movement Effects 0.000 description 1
Images
Classifications
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- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
- A44C5/00—Bracelets; Wrist-watch straps; Fastenings for bracelets or wrist-watch straps
- A44C5/18—Fasteners for straps, chains or the like
- A44C5/20—Fasteners for straps, chains or the like for open straps, chains or the like
- A44C5/2042—Fasteners provided with a turnable clamping lever
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- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
- A44C5/00—Bracelets; Wrist-watch straps; Fastenings for bracelets or wrist-watch straps
- A44C5/18—Fasteners for straps, chains or the like
- A44C5/22—Fasteners for straps, chains or the like for closed straps
- A44C5/24—Fasteners for straps, chains or the like for closed straps with folding devices
- A44C5/243—Automatic folding spring closure
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- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
- A44C5/00—Bracelets; Wrist-watch straps; Fastenings for bracelets or wrist-watch straps
- A44C5/18—Fasteners for straps, chains or the like
- A44C5/22—Fasteners for straps, chains or the like for closed straps
- A44C5/24—Fasteners for straps, chains or the like for closed straps with folding devices
Definitions
- the present invention relates to a clasp for a wristwatch, as well as a bracelet and a wristwatch as such comprising such a clasp.
- the first solution is simple and consists in providing the ends of each strand with cooperation means, for example in the form of a simple loop and a barb on the one hand cooperating with holes on the other hand.
- cooperation means for example in the form of a simple loop and a barb on the one hand cooperating with holes on the other hand.
- Such a solution has the drawback that when the cooperation means are opened, the two strands of the bracelet are immediately separated and entail a risk of the wristwatch falling.
- Another solution consists in providing an intermediate element of the clasp type, arranged between the two bracelet strands, which always remains integral with the ends of these two strands.
- a clasp occupies two configurations: a closed configuration, provided for wearing the watch, in which the strap and the clasp extend around the circumference of the wrist while having a total length allowing the wristwatch to be held in place, and a open or deployed configuration which makes it possible to increase the length of the clasp and therefore of the bracelet, by separating the two ends of the two strands of the bracelet, without detaching them from the clasp, to allow passage of the hand and removal of the watch.
- this open configuration of the clasp the two strands of the bracelet are not separated, which minimizes the risk of the watch falling.
- a first objective is the search for optimal comfort when wearing the bracelet. For this, it is advantageous for the clasp to best match the contour of a wrist, even a small wrist, when the clasp is in the closed configuration.
- a second objective is to achieve a large opening surface of the bracelet in the deployed configuration of the clasp, to facilitate the passage of a hand, suitable for the passage of a large hand.
- a difficulty in the production of a clasp therefore consists in defining the compromise between the fact of marrying the wrist of a wearer of a wristwatch in an adequate and comfortable manner and the fact of offering a sufficiently large opening for the passage of the wearer's hand, regardless of the dimensions of the wearer's hand and wrist.
- Such solutions with clasp are disclosed for example in the documents EP 0 344 620 A1 , CH 709 911 A1 , JP S53 166673 U and CH 663 522 A5 .
- the document EP1654950 describes for example a clasp of the state of the art.
- a clasp is illustrated by the figures 1 to 3 . It comprises two blades 1, 2 hinged together around an axis A1 at their first ends. Each of these two blades 1, 2 comprises a connection respectively with a strap strand 101, 102 via a respective axis A2, A3 positioned at their second end.
- the first blade 1, commonly called the center blade is more precisely linked to a first strand 101 of bracelet 100 via a cover 3.
- the figure 1 illustrates the deployed configuration of the clasp, in which the two blades 1, 2 are deployed, namely that they form an obtuse angle, and extend substantially continuously around their axis A1 of articulation to maximize the total length of the bracelet and facilitate the passage of one hand.
- the picture 2 illustrates an intermediate configuration, in which the first blade 1 is brought closer to the second blade 2 by rotation around the axis A1 of articulation, so as to form an acute angle.
- the picture 3 illustrates the closed configuration of the clasp, in which the blades 1, 2 are folded over one another, namely that they form a substantially zero angle, and retained in this configuration by a locking device, which comprises a hook 6 arranged at the end of the first blade and cooperating with a locking stud 5 carried by the second blade 2.
- a lever 4 carried by the cover 3 is adapted to actuate the locking device to allow its opening and the return to the deployed configuration.
- Such a state-of-the-art solution meets the comfort requirements through the two blades 1, 2 which have a substantially identical curvature r1, r2 in order to be able to be superimposed in a closed configuration while best marrying the shape of a wrist.
- the first blade is a mobile blade 1, which performs a rotation of substantially 180 degrees around its axis A1 of articulation between the two closed and deployed configurations of the clasp.
- the length of the two blades 1, 2 is studied so that they can also marry the shape of a small wrist.
- the limited length of the blades of the clasp has the effect of limiting the opening surface offered by the clasp in the deployed configuration, which can hinder the passage of a hand, particularly in the case of a large hand.
- Increasing the length of the slats would not be a satisfactory solution because it could affect wearing comfort, especially in the case of a small wrist.
- the invention seeks to define a clasp solution making it possible to achieve an optimal compromise between wearing comfort and a satisfactory opening for the passage of a hand.
- the invention seeks to define a clasp of restricted size, of user-friendly handling and/or of attractive aesthetics.
- the movable blade 1 having pivoted by substantially 180 degrees around its axis of articulation from the closed configuration of the clasp, it is in an inverted position vis-à-vis the wrist with respect to its positioning in the closed configuration, in which its curvature r1 is therefore reversed, so that it has a substantially convex shape seen from the wrist.
- This convexity of the blade 1 can induce discomfort when it comes to placing the wristwatch on the wrist of a wearer, in particular a wearer with a large hand.
- the blade 1 has a shape that can form an obstacle, likely to abut against the wearer's hand during the passage of the watch.
- the invention in particular brings an improvement to such a clasp of the state of the art by allowing at least one movable blade to have a second predefined shape, which facilitates the passage of a hand.
- a movable blade in its second predefined shape defines a favorable overall shape of the clasp in its deployed configuration, without necessarily increasing the length of the blades of the clasp. This length is advantageously between 20 and 60 mm.
- Such a solution is therefore based on at least one movable blade of a clasp which has a first predefined shape adapted to the closed configuration of the clasp, and which can have a second different predefined shape in a deployed configuration of the clasp to facilitate the passage of a hand.
- Such a solution thus makes it possible to retain the optimum comfort of the clasp in its closed configuration, while optimizing the passage surface of a wrist in the deployed configuration.
- the clasp has an overall structure very close to the solution of the state of the art described with reference to the figures 1 to 3 , whose identical or similar elements bear the same references and will not be described again in detail.
- the mode of embodiment of the invention differs mainly from the state of the art by its movable blade 1.
- the movable blade 1 comprises two parts 11, 12 of substantially the same length, hinged together via a hinge pin A11. This articulation is delimited angularly by stops 11a, 11b of the first part 11, cooperating with corresponding stops 12a, 12b of the second part 12. These stops unequivocally define first and second forms of the movable blade 1, in which the two parts 11, 12 occupy different respective positions.
- the movable blade 1 can indeed occupy a first shape C1 adapted to the closed configuration of the clasp.
- This first shape is therefore close to the shape of the second blade 2 on which the mobile blade 1 rests in the closed configuration of the clasp, particularly illustrated by the figure 8 .
- the figure 4 represents the clasp in the deployed configuration, in which the movable blade 1 has retained its first shape C1: in such a shape, the deployed clasp is similar to that of the state of the art represented by the figure 1 .
- the movable blade 1 By its rotation around the axis A1 of articulation, the movable blade 1 has reversed its positioning vis-à-vis the wrist, and its curved, concave shape seen from the wrist P in the closed configuration, intended to match the shape of a wrist P, becomes convex seen from the wrist P once the angle between the two blades has become obtuse.
- the movable blade 1 can however have a second predefined shape C2, illustrated by the figure 5 , in which the two parts 11, 12 have been rotated around their axis of articulation A11. This rotation has the effect of separating the axis of articulation A11, as well as the two parts 11, 12 of the movable blade 1, from the wrist P.
- the two parts 11, 12 of the mobile blade 1 which were on the side of the wrist P with respect to the segment S connecting the two axes A1, A2 positioned at the two ends of the mobile blade 1 in its first shape C1 illustrated on the figure 4 , are transferred beyond this segment S into the second form C2 of the mobile blade, illustrated by the figure 5 .
- the mobile blade 1 In its second shape, the mobile blade 1 thus protrudes beyond the segment S, according to a view from the wrist P. In this second predefined shape of the mobile blade, its convexity is therefore suppressed. It even has at least one concave portion. In its second form C2, the movable blade 1 no longer has a shape likely to form an obstacle or a hindrance to the passage of a hand.
- the deployed clasp thus defines a passage surface for a hand that is increased with respect to this surface for passage of a hand in the configuration of the clasp of the figure 4 .
- the distance to the segment S of the axis of articulation A11 is substantially identical in the two predefined shapes C1, C2 of the mobile blade, but the latter is positioned on either side of this segment S in these two shapes.
- this characteristic allows the movable blade 1 in its second form C2 to extend the blade 2 with substantially the same curvature when the clasp occupies its configuration of the figure 5 .
- the amplitude of the respective rotation of the two parts 11, 12 of the movable blade, as well as their two extreme positions, are perfectly predefined by the stops provided on the parts 11, 12.
- the second abutments 11b, 12b of respectively the parts 11, 12 bear against one another, as illustrated by the figure 6 .
- their first stops 11a, 12a bear against one another.
- the amplitude of movement of the parts 11, 12 of the movable blade 1 between their two predefined positions, corresponding to each of the predefined shapes of the clasp is preferably of the order of 60°. This amplitude is advantageously between 20° and 80° inclusive.
- This controlled amplitude or displacement of the rotation of the two parts 11, 12 of the movable blade not only allows the movable blade 1 to have a second advantageous shape, but also to promote user-friendly handling of the clasp.
- this clearance makes it possible to achieve the main sought-after objective of optimizing the passage of a wearer's hand. Too little travel will have little effect on the moving blade, which would retain the drawbacks of the state of the art. Too great a clearance would have the effect of reducing the opening surface of the deployed clasp, which would therefore have an effect contrary to that sought.
- the closure of the clasp comprises the rotation of the mobile blade 1 around the axis A1 of articulation up to an intermediate configuration, an example of which is illustrated by the figure 7 , in which the first part 11 of the movable blade has reached its final position resting against the second movable blade 2, while its second part 12 remains apart because the movable blade 1 has remained in its second shape C2.
- the continuation of the same movement causes the rotation of this second part 12 around the axis of articulation A11, until the movable blade 1 regains its first shape C1, which corresponds at the same time to the final position of the mobile blade 1, superimposed on the second blade 2, in the closed position of the clasp.
- the second blade 2 advantageously has a hollow surface forming a housing 2a for receiving the central articulation A11 of the movable blade 1, visible on the figure 8 , which promotes the rotation of the second part 12 relative to the hinge axis A11 while the first part 11 is already in place against the blade 2, in the intermediate configuration, and the rotation of the two blades 1, 2 between them around their axis A1 of articulation is finalized.
- This housing 2a can be formed by a slight milling 2a carried out in the body of the second blade 2.
- the clasp according to the embodiment of the invention is equipped with a locking device which makes it possible to maintain the two blades 1, 2 fixed to each other, in the closed configuration of the clasp, as represented by the figure 8 .
- the invention does not relate specifically to the device for locking and/or unlocking the slats, but it is advantageously compatible with a user-friendly and safe locking device which is particularly efficient, which is similar to the locking device described in the document EP1654950 .
- the two shapes C1, C2 of the mobile blade are predefined shapes in that they are reached in a unique way by a voluntary movement of the wearer of the watch until they reach a stop.
- One or both of the predefined shapes can be stable shapes or not.
- a stable form can for example be obtained by the combination of a certain resistance voluntarily imposed at the level of the articulation between the two parts 11, 12 around the axis of articulation A11 and the stops.
- the two parts 11, 12 of the moving blade have been chosen to be substantially the same length, their axis of articulation A11 being positioned substantially in the middle of the moving blade 1. Alternatively, these parts could have a different length.
- the movable blade 1 can comprise more than two articulated parts.
- the figures 9 to 12 illustrate a second variant embodiment in which the movable blade 1 comprises four parts 11, 12, 13, 14 which are hinged in pairs by respective hinge pins A11, A12 and A13.
- Each of these joints is similar to the A11 joint described previously, with movement limited by stops, defining two predefined positions, as is for example illustrated with the two positions of the A13 joint by the figures 11 and 12 , with the aid of the first stops 13a, 14a and the second stops 13b, 14b respectively of the two parts 13, 14.
- the angular movement of the parts 12, 13, 14 relative respectively to the parts 11, 12, 13 is here order of 30°.
- the angular movement of the various parts depends in particular on the number of joints.
- the amplitude of movement of the different parts of movable blade 1 advantageously remains between 20° and 80°.
- the movable blade 1 can also have two predefined shapes, depending on whether each articulation A11, A12, A13 is in a position defined by first stops or by second stops.
- the figure 9 illustrates the first predefined shape C1 of the mobile blade, intended to be used in the closed configuration of the clasp. This first shape is convex, seen from the wrist, in deployed configuration, similar to the shape of the figure 1 and 4 .
- the figure 10 illustrates the second predefined shape C2, useful for optimizing the opening of the clasp for the passage of a hand in the deployed configuration of the clasp.
- the second shape is predefined so as to substantially follow the segment S, which maximizes the length of the moving blade.
- the axes of articulation A13, A14, A15 in particular project beyond the segment S.
- the convex shape is thus eliminated.
- the movable blade 1 even has a slightly concave portion, seen from the wrist of the wearer of the wristwatch.
- the absolute value of the radius of curvature of the movable blade 1 or of a portion of movable blade 1 can vary, or even significantly vary, when the movable blade 1 changes from its first shape C1 to its second shape C2 .
- the absolute value of the radius of curvature of a movable blade portion 1 in its second shape C2 is greater, or even significantly greater, than the absolute value of the radius of curvature of the movable blade 1 in its first shape C1, by example 1.5 times to 5 times greater. This can make it possible to best match the parts of a hand having the strongest curvatures, such as the contour of the thumb, during the passage of the watch.
- the figures 13 to 16 illustrate a second embodiment, in which the movable blade 1 is still divided into four parts 11, 12, 13, 14, by way of example. Naturally, any other number of parts greater than two would be possible.
- This second embodiment differs from the first embodiment by the connections A11, A12, A13 between the various parts, which are formed by zones of less thickness of the movable blade 1.
- the zones of less thickness are obtained by removing material, symmetrically from the two opposite surfaces of the movable blade 1: this removal of material takes the form of hollow parts in the form of semi-circles of radius r, which leave only a small minimum thickness e of material, positioned at the center in the thickness of the moving blade 1.
- connection thus form necks, the behavior of which is similar to that of a joint A11, A12, A13 of the previous embodiment.
- other areas of less thickness could also form a flexible pivot type connection.
- the chosen geometry is therefore based on two semi-circles of radius r: preferably, this radius r of the semi-circles is at least greater than four times the minimum thickness e of the movable blade 1. This condition allows to distribute the stresses as well as possible and in particular makes it possible to avoid any concentration of stress in the middle of the neck.
- the mobile blade 1 can be formed from a superelastic alloy, such as a nickel-titanium alloy such as Nitinol, in order to maximize the thickness e and thus optimize the resistance to traction and torsion of the mobile blade. 1 for a given maximum angular displacement of the various blade portions.
- a superelastic alloy such as a nickel-titanium alloy such as Nitinol
- such a joint is delimited angularly by stops, so as to unequivocally define the first and second predefined shapes of the movable blade 1, by the relative positioning of the different parts 11, 12, 13, 14 of the movable blade 1.
- stops are formed by side walls of each part of the blade at each of the necks.
- the necks advantageously do not cover the entire cross-section of the movable blade 1, which retains side walls of unchanged thickness, but sectioned to allow pivoting and form stops.
- the stops could be removed and the angular travel could be limited by the very rigidity of the necks.
- the zones of less thickness could have another shape, inducing a deformation of the blade which may move away from a pure pivoting movement.
- the movable blade 1 can therefore have a first predefined shape C1, represented on the figures 14 and 15 , and can have a second form C2 represented by the figure 16 .
- the first shape C1 is similar to the first shape of the first embodiment.
- the second form C2 is similar to the second form of the second variant of the first embodiment, represented in figure 10 .
- the movable blade 1 in the deployed configuration, if the movable blade 1 has its first shape C1, it comprises at least one zone which protrudes from the first side of the segment S oriented towards the wrist P, defined previously, and even has a convex shape mainly oriented towards the wrist.
- the movable blade is substantially rectilinear, and comprises at least one zone which protrudes from the second side of the segment S, opposite to the wrist P.
- the joints A11, A12, A13 protrude beyond the segment S, opposite the wrist P.
- the movable blade 1 comprises at least one portion which has a substantially concave shape when seen from the wrist of the wearer of the wristwatch.
- the absolute value of the radius of curvature of a portion of the moving blade 1 in its second shape C2 is greater, or even significantly greater, than the absolute value of the radius of curvature of the moving blade 1 in its first shape C1, for example 1.5 times to 5 times greater.
- a blade mobile 1 comprising different types of joints, grouping for example at least one joint as provided in the first embodiment and at least one joint as provided in the second embodiment.
- the figures 17 to 20 illustrate a third embodiment, in which the movable blade 1 is divided into two parts 11, 12.
- This third embodiment differs from the two previous embodiments in that it does not include a connection between the two parts 11, 12 of the pivot type, the behavior of the blade to change shape not being based on a joint.
- the figures 17 and 18 illustrate the movable blade 1 in its second shape C2, which is its shape at rest. Its two parts 11, 12 are not distinguished by a different shape and thickness.
- the movable blade 1 first comprises a first concave part 11, seen from the wrist P, close to the axis A1 of articulation of the movable blade 1 with the second blade 2, even rectilinear, then a second part 12 substantially rectilinear, or even slightly convex, seen from the wrist P.
- the movable blade 1 thus comprises a zone of inflection Z1 between the two parts 11, 12.
- the movable blade 1 is therefore shaped to present in this second shape C2 a first part 11 which protrudes from the side of the segment S, extending between the two axes A1, A2 positioned at its ends, opposite to the wrist P.
- the preforming of the movable blade 1 thus defines an unequivocal and stable geometry at rest, which corresponds to the second predefined C2 shape.
- the mobile blade 1 makes it possible to optimize the passage of a hand when putting on the wrist or when removing the wristwatch from the wrist.
- the first part 11 of substantially concave shape or straight line of the mobile blade 1 thus offers an additional passage to the hand of the wearer of the watch compared to the solution of the state of the art represented by the figure 1 .
- Such a first part 11 is for example particularly suitable for the passage of the thumb of a hand of the wearer.
- the wearer of the watch then continues the closing movement of the clasp, which induces the displacement of the mobile blade 1 towards the second blade 2 and an elastic deformation of the mobile blade 1.
- This elastic deformation of the mobile blade 1 occurs in particular mainly at the level of the part 11, and can in particular occur at the level of the zone of inflection Z1.
- the movement is continued until the closure of the clasp, namely until the attachment of the movable blade 1 with the second blade 2 of the clasp, in particular by an appropriate locking device 4, 5, 6.
- the movable blade 1 is thus found deformed so as to present a first shape C1 in which its curvature is substantially constant and designed to best match the curvature of the blade 2, as well as the wrist of a wearer.
- the first form C1 of the movable blade is illustrated on the figure 20 , in comparison with the second form C2.
- this third embodiment could be obtained by any geometry of the moving blade 1 having at least one zone of inflection. It could therefore comprise several zones of inflection.
- the first part 11 has a thickness e1 less than the thickness e2 of the second part 12 so that the first part 11 can be flexible, in particular in comparison with the second part, and present optimized bending moment.
- the second part 12 is considered to be rigid and non-deformable in this embodiment, under the effect of conventional manipulations by the wearer of the wristwatch.
- the thickness e1 of the first part 11 may be constant over the entire length of the first part 11.
- the thickness e2 of the second part 12 may be constant over the entire second part 12.
- these thicknesses e1 and / or e2 can vary, continuously or discontinuously, so as to provide a mobile blade 1 that is deformable in bending, while being sufficiently resistant to traction and torsion with regard to predefined requirement criteria.
- the cross-section of each of the parts can also vary so as to meet these criteria.
- the movable blade 1 can simply have a variable thickness along its length, without an inflection zone. This variable thickness forms a compromise that allows it to achieve sufficient flexibility to deform elastically between two different shapes, while retaining sufficient mechanical rigidity for handling.
- the movable blade 1 can be formed from a superelastic alloy, such as a nickel-titanium alloy such as Nitinol.
- the elastic potential energy accumulated by the elastic deformation of the mobile blade 1 in its first shape, in the closed configuration of the clasp can be used to contribute to the locking and/or unlocking function of the mobile blade 1 , in cooperation with a locking device 4, 5, 6 of the two blades 1, 2 of the clasp.
- the elastic potential energy accumulated by the elastic deformation of the mobile blade 1 in its first shape can be used to facilitate the opening of the clasp, namely to allow the moving away of the mobile blade 1 relative to the second blade 2, by its pivoting around the axis A1 of articulation, without significant contribution from the wearer of the wristwatch.
- the clasp could have any other architecture than that represented by the figures. It could include a greater number of folding blades. For example, it could comprise three slats, including two movable slats arranged respectively at the two ends of a third center slat, and coming to be locked in the central part of this third slat in the closed configuration of the clasp.
- a movable blade or the two movable blades could comprise several movable parts with respect to each other to achieve two predefined shapes.
- the movable blade has been illustrated as folding over another blade in a closed configuration, its closed position being fixed by a locking device.
- a simple holding device for example by simple clipping, and/or any other locking device can be provided for the temporary and removable fixing of the mobile blade on the clasp in closed configuration of the clasp.
- the mobile blade has been illustrated as being superimposed on another blade in the closed configuration of the clasp.
- this movable blade could occupy a different position in the closed configuration of the clasp, for example totally or partially nested in another blade. More generally, the movable blade thus extends continuously over its entire length substantially along the surface of a second blade in the closed configuration of the clasp.
- the mobile blade can take on several geometries.
- a mobile blade of a clasp within the meaning of the invention as a blade comprising an articulation at the level of a first end, around which it pivots with respect to another blade of the clasp for the passage of a closed configuration to an extended configuration of the clasp, or vice versa, and which extends continuously from its first end towards a second end in the closed configuration of the clasp.
- This mobile blade comprises two predefined shapes, that is to say that these shapes can be obtained repeatedly and reliably, automatically or under the effect of a given actuation of a wearer of the clasp.
- These shapes can be predefined in different ways, by the geometric and/or mechanical properties of the moving blade.
- a predefined shape can be stable or not: a shape is stable when it is automatically maintained when it is reached, in the absence of any constraint exerted by a wearer.
- the invention has been illustrated on the basis of a clasp intended for a bracelet, this bracelet being intended for a wristwatch.
- the invention thus also relates to a bracelet and to a wristwatch as such, comprising such a clasp.
- the clasp can be associated with any other bracelet, for any object other than a watch to be attached to a wrist or any other part.
- This object can be a “smartwatch”, a scuba diving accessory such as a depth gauge or a scuba diving computer for example, or even a jewelry component.
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- Professional, Industrial, Or Sporting Protective Garments (AREA)
- Slide Fasteners (AREA)
Description
La présente invention concerne un fermoir pour montre-bracelet, ainsi qu'un bracelet et une montre-bracelet en tant que tels comprenant un tel fermoir.The present invention relates to a clasp for a wristwatch, as well as a bracelet and a wristwatch as such comprising such a clasp.
Il existe plusieurs solutions pour accrocher les deux brins d'un bracelet de montre autour du poignet de son porteur. La première solution est simple et consiste à doter les extrémités de chaque brin de moyens de coopération, sous la forme par exemple d'une simple boucle et d'un ardillon d'une part coopérant avec des trous d'autre part. Une telle solution présente l'inconvénient que lors de l'ouverture des moyens de coopération, les deux brins du bracelet sont immédiatement désolidarisés et entraînent un risque de chute de la montre-bracelet.There are several solutions for attaching the two strands of a watch strap around the wearer's wrist. The first solution is simple and consists in providing the ends of each strand with cooperation means, for example in the form of a simple loop and a barb on the one hand cooperating with holes on the other hand. Such a solution has the drawback that when the cooperation means are opened, the two strands of the bracelet are immediately separated and entail a risk of the wristwatch falling.
Pour pallier cet inconvénient, une autre solution consiste à prévoir un élément intermédiaire de type fermoir, disposé entre les deux brins de bracelet, qui reste toujours solidaire des extrémités de ces deux brins. Un tel fermoir occupe deux configurations : une configuration fermée, prévue pour le port de la montre, dans laquelle le bracelet et le fermoir s'étendent sur le pourtour du poignet en présentant une longueur totale permettant le maintien de la montre-bracelet, et une configuration ouverte ou déployée qui permet d'augmenter la longueur du fermoir et donc du bracelet, en écartant les deux extrémités des deux brins du bracelet, sans les détacher du fermoir, pour permettre le passage de la main et le retrait de la montre. Dans cette configuration ouverte du fermoir, les deux brins du bracelet ne sont pas désolidarisés, ce qui minimise le risque de chute de la montre.To overcome this drawback, another solution consists in providing an intermediate element of the clasp type, arranged between the two bracelet strands, which always remains integral with the ends of these two strands. Such a clasp occupies two configurations: a closed configuration, provided for wearing the watch, in which the strap and the clasp extend around the circumference of the wrist while having a total length allowing the wristwatch to be held in place, and a open or deployed configuration which makes it possible to increase the length of the clasp and therefore of the bracelet, by separating the two ends of the two strands of the bracelet, without detaching them from the clasp, to allow passage of the hand and removal of the watch. In this open configuration of the clasp, the two strands of the bracelet are not separated, which minimizes the risk of the watch falling.
Dans une solution avec fermoir, un premier objectif est la recherche d'un confort optimal lors du porter du bracelet. Pour cela, il est avantageux que le fermoir épouse au mieux le contour d'un poignet, même d'un petit poignet, lorsque le fermoir est en configuration fermée. En parallèle, un deuxième objectif est d'atteindre une surface d'ouverture importante du bracelet en configuration déployée du fermoir, pour faciliter le passage d'une main, adapté pour le passage d'une main de grande dimension. Les deux objectifs mentionnés ci-dessus peuvent apparaître contradictoires, car des lames de fermoir de petite dimension favorisent l'atteinte du premier objectif au détriment du deuxième objectif, qui exigerait plutôt des lames de plus grande dimension. Une difficulté dans la réalisation d'un fermoir consiste donc à définir le compromis entre le fait d'épouser de manière adéquate et confortable le poignet d'un porteur d'une montre-bracelet et le fait d'offrir une ouverture suffisamment importante pour le passage de la main du porteur, quelles que soient les dimensions de la main et du poignet du porteur. De telles solutions avec fermoir sont divulgués par exemple dans les documents
Le document
Une telle solution de l'état de la technique répond aux exigences de confort par les deux lames 1, 2 qui présentent une courbure r1, r2 sensiblement identique pour pouvoir se superposer en configuration fermée tout en épousant au mieux la forme d'un poignet. La première lame est une lame mobile 1, qui effectue une rotation de sensiblement 180 degrés autour de son axe A1 d'articulation entre les deux configurations fermée et déployée du fermoir. La longueur des deux lames 1, 2 est étudiée de sorte qu'elles puissent aussi épouser la forme d'un petit poignet. Enfin, une telle solution de l'état de la technique est avantageuse en ce qu'elle utilise un dispositif de verrouillage convivial, intuitif, et sûr qui est particulièrement performant.Such a state-of-the-art solution meets the comfort requirements through the two
La longueur limitée des lames du fermoir a pour effet de limiter la surface d'ouverture offerte par le fermoir en configuration déployée, ce qui peut entraver le passage d'une main, particulièrement dans le cas d'une main de grande taille. L'augmentation de la longueur des lames ne serait pas une solution satisfaisante car elle pourrait nuire au confort du porter, notamment dans le cas d'un petit poignet. Par ailleurs, il n'existe bien entendu pas de corrélation universelle entre la taille de la main et celle du poignet du porteur d'une montre-bracelet et il n'existe donc pas de règle pour optimiser la longueur des lames en fonction de la taille du poignet ou de la taille de la main.The limited length of the blades of the clasp has the effect of limiting the opening surface offered by the clasp in the deployed configuration, which can hinder the passage of a hand, particularly in the case of a large hand. Increasing the length of the slats would not be a satisfactory solution because it could affect wearing comfort, especially in the case of a small wrist. Furthermore, there is of course no universal correlation between the size of the hand and that of the wrist of the wearer of a wristwatch and there is therefore no rule for optimizing the length of the blades according to the wrist size or hand size.
D'autres solutions de l'état de la technique répondent aux exigences contradictoires explicitées précédemment en multipliant le nombre de lames. De telles solutions présentent toutefois les inconvénients de complexifier la construction, d'augmenter son encombrement et de rendre difficile la manipulation du fermoir.Other solutions of the state of the art meet the contradictory requirements explained above by multiplying the number of blades. Such solutions, however, have the drawbacks of making the construction more complex, of increasing its size and of making it difficult to manipulate the clasp.
C'est pourquoi l'invention cherche à définir une solution de fermoir permettant d'atteindre un compromis optimal entre le confort au porter et une ouverture satisfaisante pour le passage d'une main.This is why the invention seeks to define a clasp solution making it possible to achieve an optimal compromise between wearing comfort and a satisfactory opening for the passage of a hand.
En complément, l'invention cherche à définir un fermoir d'encombrement restreint, de manipulation conviviale et/ou d'esthétique attrayante.In addition, the invention seeks to define a clasp of restricted size, of user-friendly handling and/or of attractive aesthetics.
A cet effet, l'invention repose sur un fermoir à lames déployantes pour bracelet, caractérisé en ce qu'il comprend au moins deux lames, dont une lame mobile articulée sur une deuxième lame au niveau de premières extrémités, le fermoir pouvant occuper une première configuration fermée dans laquelle :
- La lame mobile présente une première forme prédéfinie et s'étend de manière continue sur toute sa longueur, sensiblement le long de la surface de la deuxième lame ;
- La deuxième extrémité de la lame mobile est maintenue en position par le fermoir;
- le fermoir pouvant occuper une deuxième configuration déployée dans laquelle la deuxième extrémité de la lame mobile est libre, la lame mobile pouvant ainsi être éloignée de la surface de la deuxième lame,
- caractérisé en ce que, dans la deuxième configuration déployée, la lame mobile est apte à présenter une deuxième forme prédéfinie, différente de la première forme prédéfinie, pour optimiser la surface de passage de la main d'un porteur du fermoir.
- The movable blade has a first predefined shape and extends continuously over its entire length, substantially along the surface of the second blade;
- The second end of the movable blade is held in position by the clasp;
- the clasp being able to occupy a second deployed configuration in which the second end of the mobile blade is free, the mobile blade thus being able to be moved away from the surface of the second blade,
- characterized in that, in the second deployed configuration, the movable blade is able to present a second predefined shape, different from the first predefined shape, to optimize the passage surface of the hand of a wearer of the clasp.
L'invention est précisément définie par les revendications.The invention is precisely defined by the claims.
Ces objets, caractéristiques et avantages de la présente invention seront exposés en détail dans la description suivante de modes de réalisation particuliers faits à titre non-limitatif en relation avec les figures jointes parmi lesquelles :
- La
figure 1 représente une vue d'un fermoir déployé selon une solution de l'état de la technique. - La
figure 2 représente une vue en perspective du fermoir partiellement déployé selon la solution de l'état de la technique. - La
figure 3 représente une vue en coupe du fermoir selon la solution de l'état de la technique en configuration fermée. - La
figure 4 représente une vue d'un fermoir déployé dont une lame mobile présente une première forme selon une première variante du premier mode de réalisation de l'invention. - La
figure 5 représente une vue du fermoir déployé dont la lame mobile présente une deuxième forme selon la première variante du premier mode de réalisation de l'invention. - La
figure 6 représente un détail de la lame mobile du fermoir selon la première variante du premier mode de réalisation de l'invention. - La
figure 7 représente une vue du fermoir selon la première variante du premier mode de réalisation de l'invention dans une configuration intermédiaire. - La
figure 8 représente une vue du fermoir selon la première variante du premier mode de réalisation de l'invention dans une configuration fermée. - La
figure 9 représente une lame mobile présentant une première forme selon une deuxième variante du fermoir selon le premier mode de réalisation de l'invention. - La
figure 10 représente une lame mobile présentant une deuxième forme selon la deuxième variante du fermoir selon le premier mode de réalisation de l'invention. - La
figure 11 représente un détail de la lame mobile dans sa première forme selon la deuxième variante du fermoir selon le premier mode de réalisation de l'invention. - La
figure 12 représente un détail de la lame mobile dans sa deuxième forme selon la deuxième variante du fermoir selon le premier mode de réalisation de l'invention. - La
figure 13 représente une vue d'un fermoir selon un deuxième mode de réalisation de l'invention dans une configuration intermédiaire. - La
figure 14 représente une vue en perspective d'une lame mobile présentant une première forme du fermoir selon le deuxième mode de réalisation de l'invention. - La
figure 15 représente une vue de côté en coupe de la lame mobile présentant une première forme du fermoir selon le deuxième mode de réalisation de l'invention. - La
figure 16 représente une vue de côté de la lame mobile présentant une deuxième forme du fermoir selon le deuxième mode de réalisation de l'invention. - La
figure 17 représente une vue d'un fermoir selon un troisième mode de réalisation de l'invention dans une configuration déployée. - La
figure 18 représente une vue d'une lame mobile présentant une deuxième forme du fermoir selon le troisième mode de réalisation de l'invention. - La
figure 19 représente une vue du fermoir selon le troisième mode de réalisation de l'invention dans une configuration intermédiaire. - La
figure 20 représente une vue de la lame mobile présentant une première forme et une deuxième forme du fermoir selon le troisième mode de réalisation de l'invention.
- The
figure 1 represents a view of a clasp deployed according to a solution of the state of the art. - The
figure 2 shows a perspective view of the partially deployed clasp according to the prior art solution. - The
picture 3 - The
figure 4 shows a view of a deployed clasp, a mobile blade of which has a first shape according to a first variant of the first embodiment of the invention. - The
figure 5 shows a view of the deployed clasp whose movable blade has a second shape according to the first variant of the first embodiment of the invention. - The
figure 6 shows a detail of the movable blade of the clasp according to the first variant of the first embodiment of the invention. - The
figure 7 shows a view of the clasp according to the first variant of the first embodiment of the invention in an intermediate configuration. - The
figure 8 shows a view of the clasp according to the first variant of the first embodiment of the invention in a closed configuration. - The
figure 9 represents a movable blade having a first shape according to a second variant of the clasp according to the first embodiment of the invention. - The
figure 10 represents a movable blade having a second shape according to the second variant of the clasp according to the first embodiment of the invention. - The
figure 11 shows a detail of the movable blade in its first form according to the second variant of the clasp according to the first embodiment of the invention. - The
figure 12 represents a detail of the movable blade in its second form according to the second variant of the clasp according to the first embodiment of the invention. - The
figure 13 shows a view of a clasp according to a second embodiment of the invention in an intermediate configuration. - The
figure 14 shows a perspective view of a movable blade having a first shape of the clasp according to the second embodiment of the invention. - The
figure 15 shows a sectional side view of the movable blade having a first shape of the clasp according to the second embodiment of the invention. - The
figure 16 shows a side view of the movable blade having a second shape of the clasp according to the second embodiment of the invention. - The
figure 17 shows a view of a clasp according to a third embodiment of the invention in a deployed configuration. - The
figure 18 shows a view of a movable blade having a second form of the clasp according to the third embodiment of the invention. - The
figure 19 shows a view of the clasp according to the third embodiment of the invention in an intermediate configuration. - The
figure 20 shows a view of the movable blade having a first shape and a second shape of the clasp according to the third embodiment of the invention.
Il est constaté que dans une solution de l'état de la technique telle que celle illustrée par la
L'invention apporte notamment une amélioration à un tel fermoir de l'état de la technique en permettant à au moins une lame mobile de présenter une deuxième forme prédéfinie, qui favorise le passage d'une main. Une telle lame mobile dans sa deuxième forme prédéfinie définit une forme globale favorable du fermoir dans sa configuration déployée, sans obligatoirement augmenter la longueur des lames du fermoir. Cette longueur est avantageusement comprise entre 20 et 60 mm. Une telle solution repose donc sur au moins une lame mobile d'un fermoir qui présente une première forme prédéfinie adaptée à la configuration fermée du fermoir, et qui peut présenter une deuxième forme prédéfinie différente dans une configuration déployée du fermoir pour favoriser le passage d'une main. Une telle solution permet ainsi de conserver le confort optimal du fermoir dans sa configuration fermée, tout en optimisant la surface de passage d'un poignet en configuration déployée.The invention in particular brings an improvement to such a clasp of the state of the art by allowing at least one movable blade to have a second predefined shape, which facilitates the passage of a hand. Such a movable blade in its second predefined shape defines a favorable overall shape of the clasp in its deployed configuration, without necessarily increasing the length of the blades of the clasp. This length is advantageously between 20 and 60 mm. Such a solution is therefore based on at least one movable blade of a clasp which has a first predefined shape adapted to the closed configuration of the clasp, and which can have a second different predefined shape in a deployed configuration of the clasp to facilitate the passage of a hand. Such a solution thus makes it possible to retain the optimum comfort of the clasp in its closed configuration, while optimizing the passage surface of a wrist in the deployed configuration.
Trois modes de réalisation particuliers d'un tel fermoir vont maintenant être décrits de manière détaillée à titre non limitatif. Par mesure de simplicité, les mêmes références seront utilisées pour désigner des éléments identiques ou équivalents dans les différents modes de réalisation.Three particular embodiments of such a clasp will now be described in detail without limitation. For the sake of simplicity, the same references will be used to designate identical or equivalent elements in the different embodiments.
Dans une première variante du premier mode de réalisation, représenté par les
En effet, la lame mobile 1 comprend deux parties 11, 12 de sensiblement même longueur, articulées entre elles par l'intermédiaire d'un axe d'articulation A11. Cette articulation est délimitée angulairement par des butées 11a, 11b de la première partie 11, coopérant avec des butées correspondantes 12a, 12b de la deuxième partie 12. Ces butées définissent de manière univoque des première et deuxième formes de la lame mobile 1, dans lesquelles les deux parties 11, 12 occupent des positions respectives différentes.Indeed, the
La lame mobile 1 peut en effet occuper une première forme C1 adaptée à la configuration fermée du fermoir. Cette première forme est donc proche de la forme de la deuxième lame 2 sur laquelle vient reposer la lame mobile 1 en configuration fermée du fermoir, particulièrement illustrée par la
Selon le mode de réalisation, la lame mobile 1 peut cependant présenter une deuxième forme C2 prédéfinie, illustrée par la
L'amplitude de la rotation respective des deux parties 11, 12 de la lame mobile, ainsi que leurs deux positions extrêmes, sont parfaitement prédéfinies par les butées prévues sur les parties 11, 12. Dans la deuxième forme C2 de la lame mobile, les deuxièmes butées 11b, 12b de respectivement les parties 11, 12 sont en appui l'une sur l'autre, comme illustré par la
La manipulation d'un tel fermoir selon le mode de réalisation décrit ci-dessus s'effectue de manière semblable à celle du fermoir de l'état de la technique illustré par les
Inversement, la fermeture du fermoir comprend la rotation de la lame mobile 1 autour de l'axe A1 d'articulation jusqu'à une configuration intermédiaire, dont un exemple est illustré par la
Dans ce mode de réalisation, la deuxième lame 2 présente avantageusement une surface creuse formant un logement 2a de réception de l'articulation A11 centrale de la lame mobile 1, visible sur la
Dans la majeure partie de cette manipulation du fermoir, notamment lors de la rotation de la lame mobile 1 relativement à l'axe A1 d'articulation, les deux parties 11, 12 de la lame mobile 1 restent en appui par des butées respectives, voire ont un débattement réduit, et l'articulation A11 de la lame mobile 1 ajoutée par rapport à l'état de la technique n'induit aucune gêne dans la manipulation.In most of this manipulation of the clasp, in particular during the rotation of the
En remarque, le fermoir selon le mode de réalisation de l'invention est équipé d'un dispositif de verrouillage qui permet de maintenir les deux lames 1, 2 fixées entre elles, en configuration fermée du fermoir, telle que représentée par la
En remarque, les deux formes C1, C2 de la lame mobile sont des formes prédéfinies en ce qu'elles sont atteintes de manière unique par un mouvement volontaire du porteur de la montre jusqu'à atteindre une butée. Une ou les deux formes prédéfinies peuvent être des formes stables ou non. Une forme stable peut par exemple être obtenue par la combinaison d'une certaine résistance volontairement imposée au niveau de l'articulation entre les deux parties 11, 12 autour de l'axe d'articulation A11 et des butées.As a side note, the two shapes C1, C2 of the mobile blade are predefined shapes in that they are reached in a unique way by a voluntary movement of the wearer of the watch until they reach a stop. One or both of the predefined shapes can be stable shapes or not. A stable form can for example be obtained by the combination of a certain resistance voluntarily imposed at the level of the articulation between the two
Les deux parties 11, 12 de la lame mobile ont été choisies sensiblement de même longueur, leur axe d'articulation A11 étant positionné sensiblement au milieu de la lame mobile 1. En variante, ces parties pourraient présenter une longueur différente.The two
Naturellement, le mode de réalisation n'est pas limité à l'exemple illustré ci-dessus. Notamment, la lame mobile 1 peut comprendre plus de deux parties articulées. A titre d'exemple, les
Ainsi, la lame mobile 1 selon cette variante de réalisation peut aussi présenter deux formes prédéfinies, selon que chaque articulation A11, A12, A13 est dans une position définie par des premières butées ou par des deuxièmes butées. La
D'une manière générale, la valeur absolue du rayon de courbure de la lame mobile 1 ou d'une portion de lame mobile 1 peut varier, voire significativement varier, lorsque la lame mobile 1 passe de sa première forme C1 à sa deuxième forme C2. Dans la variante de réalisation des
Les
Ces liaisons forment ainsi des cols, dont le comportement s'apparente à celui d'une articulation A11, A12, A13 du mode de réalisation précédent. En variante, d'autres zones de moindre épaisseur pourraient aussi former une liaison de type pivot flexible. Dans ce mode de réalisation, la géométrie choisie repose donc sur deux demi-cercles de rayon r : préférentiellement, ce rayon r des demi-cercles est au moins supérieur à quatre fois l'épaisseur e minimale de la lame mobile 1. Cette condition permet de répartir au mieux les contraintes et permet notamment d'éviter toute concentration de contrainte au milieu du col.These connections thus form necks, the behavior of which is similar to that of a joint A11, A12, A13 of the previous embodiment. As a variant, other areas of less thickness could also form a flexible pivot type connection. In this embodiment, the chosen geometry is therefore based on two semi-circles of radius r: preferably, this radius r of the semi-circles is at least greater than four times the minimum thickness e of the
Avantageusement, la lame mobile 1 peut être formée en un alliage superélastique, tel qu'un alliage en nickel-titane comme le Nitinol, afin de maximiser l'épaisseur e et ainsi optimiser la résistance à la traction et à la torsion de la lame mobile 1 pour un débattement angulaire maximal donné des différentes portions de lame.Advantageously, the
A l'instar du premier mode de réalisation, une telle articulation est délimitée angulairement par des butées, de façon à définir de manière univoque les première et deuxième formes prédéfinies de la lame mobile 1, par le positionnement relatif des différentes parties 11, 12, 13, 14 de la lame mobile 1. Ces butées sont formées par des parois latérales de chaque partie de la lame au niveau de chacun des cols. Dans cette construction particulière, les cols ne recouvrent avantageusement pas l'entier de la section transversale de la lame mobile 1, qui conserve des parois latérales d'épaisseur inchangée, mais sectionnée pour permettre le pivotement et former des butées. En variante, les butées pourraient être supprimées et le débattement angulaire pourrait être limité par la rigidité même des cols. En variante, les zones de moindre épaisseur pourraient présenter une autre forme, induisant une déformation de la lame pouvant s'éloigner d'un mouvement de pivot pur.Like the first embodiment, such a joint is delimited angularly by stops, so as to unequivocally define the first and second predefined shapes of the
Dans ce second mode de réalisation, la lame mobile 1 peut donc présenter une première forme C1 prédéfinie, représentée sur les
Dans le mode de réalisation des
Bien entendu, il est possible de combiner les modes de réalisation et variantes précédents. Par exemple, il est possible d'imaginer une lame mobile 1 comprenant différents types d'articulations, regroupant par exemple au moins une articulation telle que prévue dans le premier mode de réalisation et au moins une articulation telle que prévue dans le deuxième mode de réalisation.Of course, it is possible to combine the previous embodiments and variants. For example, it is possible to imagine a blade mobile 1 comprising different types of joints, grouping for example at least one joint as provided in the first embodiment and at least one joint as provided in the second embodiment.
Les
Les
Ainsi, la lame mobile 1 permet bien d'optimiser le passage d'une main lors de la mise au poignet ou lors du retrait de la montre-bracelet du poignet. Particulièrement, la première partie 11 de forme sensiblement concave ou rectiligne de la lame mobile 1 offre ainsi un passage supplémentaire à la main du porteur de la montre par rapport à la solution de l'état de la technique représentée par la
Lors de la fermeture du fermoir, la lame mobile 1 pivote vers la deuxième lame 2 autour de l'axe A1 d'articulation, jusqu'à ce que la lame mobile 1 vienne buter à l'encontre de la lame 2 au niveau de surfaces de butée respectives B1, B2. Cette configuration intermédiaire en butée est illustrée par la
Le porteur de la montre poursuit ensuite le mouvement de fermeture du fermoir, qui induit le déplacement de la lame mobile 1 vers la deuxième lame 2 et une déformation élastique de la lame mobile 1. Cette déformation élastique de la lame mobile 1 se produit notamment principalement au niveau de la partie 11, et peut notamment se produire au niveau de la zone d'inflexion Z1. Le mouvement est poursuivi jusqu'à la fermeture du fermoir, à savoir jusqu'à la fixation de la lame mobile 1 avec la deuxième lame 2 du fermoir, notamment par un dispositif de verrouillage 4, 5, 6 approprié. La lame mobile 1 se retrouve ainsi déformée de façon à présenter une première forme C1 dans laquelle sa courbure est sensiblement constante et prévue pour épouser au mieux la courbure de la lame 2, ainsi que le poignet d'un porteur. La première forme C1 de la lame mobile est illustrée sur la
En variante, ce troisième mode de réalisation pourrait être obtenu par toute géométrie de la lame mobile 1 présentant au moins une zone d'inflexion. Elle pourrait donc comprendre plusieurs zones d'inflexion. Avantageusement, dans ce mode de réalisation, la première partie 11 présente une épaisseur e1 inférieure à l'épaisseur e2 de la deuxième partie 12 de façon à ce que la première partie 11 puisse être flexible, notamment en comparaison à la deuxième partie, et présenter un moment de flexion optimisé. D'autre part, la deuxième partie 12 est considérée rigide et indéformable dans ce mode de réalisation, sous l'effet des manipulations conventionnelles du porteur de la montre-bracelet.As a variant, this third embodiment could be obtained by any geometry of the moving
Préférentiellement, les deux épaisseurs e1, e2 de chaque partie 11, 12 respective vérifient :
- e1 <e2/2, voire e1 <e2/3 ;
- e2 ~ e3, où e3 est l'épaisseur constante de la lame 2 ;
- e1 ~ 0.3 mm et e2 ~ 1 mm.
- e1 <e2/2, even e1 <e2/3;
- e2 ~ e3, where e3 is the constant thickness of
blade 2; - e1 ~ 0.3mm and e2 ~ 1mm.
L'épaisseur e1 de la première partie 11 peut être constante sur toute la longueur de la première partie 11. De même, l'épaisseur e2 de la deuxième partie 12 peut être constante sur toute la deuxième partie 12. Alternativement, ces épaisseurs e1 et/ou e2 peuvent varier, de manière continue ou discontinue, de façon à proposer une lame mobile 1 déformable en flexion, tout en étant suffisamment résistante à la traction et à la torsion en regard de critères d'exigence prédéfinis. La section transversale de chacune des parties peut également varier de façon à répondre à ces critères.The thickness e1 of the
Selon une variante du troisième mode de réalisation non représentée, la lame mobile 1 peut simplement présenter une épaisseur variable sur sa longueur, sans zone d'inflexion. Cette épaisseur variable forme un compromis qui lui permet d'atteindre une souplesse suffisante pour se déformer élastiquement entre deux formes différentes, tout en conservant une rigidité mécanique suffisante pour sa manipulation.According to a variant of the third embodiment not shown, the
Avantageusement, la lame mobile 1 peut être formée en un alliage superélastique, tel qu'un alliage en nickel-titane comme le Nitinol.Advantageously, the
Préférentiellement, l'énergie potentielle élastique accumulée par la déformation élastique de la lame mobile 1 dans sa première forme, en configuration fermée du fermoir, peut être mise à profit pour contribuer à la fonction de verrouillage et/ou de déverrouillage de la lame mobile 1, en coopération avec un dispositif de verrouillage 4, 5, 6 des deux lames 1, 2 du fermoir. Notamment, l'énergie potentielle élastique accumulée par la déformation élastique de la lame mobile 1 dans sa première forme peut être mise à profit pour faciliter l'ouverture du fermoir, à savoir permettre l'éloignement de la lame mobile 1 relativement à la deuxième lame 2, par son pivotement autour de l'axe A1 d'articulation, sans contribution significative du porteur de la montre-bracelet.Preferably, the elastic potential energy accumulated by the elastic deformation of the
L'invention a été illustrée dans le cadre d'un fermoir à lames déployantes comprenant deux lames 1, 2. En variante, le fermoir pourrait présenter toute autre architecture que celle représentée par les figures. Il pourrait comprendre un nombre supérieur de lames déployantes. Par exemple, il pourrait comprendre trois lames, dont deux lames mobiles agencées respectivement aux deux extrémités d'une troisième lame de centre, et venant se verrouiller en partie centrale de cette troisième lame en configuration fermée du fermoir. Dans ce cas, une lame mobile ou les deux lames mobiles pourraient comprendre plusieurs parties mobiles les unes par rapport aux autres pour atteindre deux formes prédéfinies.The invention has been illustrated in the context of a clasp with folding blades comprising two
La lame mobile a été illustrée comme se repliant sur une autre lame en configuration fermée, sa position fermée étant fixée par un dispositif de verrouillage. En variante, un simple dispositif de maintien, par exemple par un simple clippage, et/ou tout autre dispositif de verrouillage peut être prévu pour la fixation temporaire et amovible de la lame mobile sur le fermoir en configuration fermée du fermoir. De plus, la lame mobile a été illustrée comme se superposant sur une autre lame en configuration fermée du fermoir. En variante, cette lame mobile pourrait occuper un positionnement différent en configuration fermée du fermoir, par exemple totalement ou partiellement imbriqué dans une autre lame. Plus généralement, la lame mobile s'étend ainsi de manière continue sur toute sa longueur sensiblement le long de la surface d'une deuxième lame en configuration fermée du fermoir.The movable blade has been illustrated as folding over another blade in a closed configuration, its closed position being fixed by a locking device. As a variant, a simple holding device, for example by simple clipping, and/or any other locking device can be provided for the temporary and removable fixing of the mobile blade on the clasp in closed configuration of the clasp. In addition, the mobile blade has been illustrated as being superimposed on another blade in the closed configuration of the clasp. As a variant, this movable blade could occupy a different position in the closed configuration of the clasp, for example totally or partially nested in another blade. More generally, the movable blade thus extends continuously over its entire length substantially along the surface of a second blade in the closed configuration of the clasp.
Selon l'architecture du fermoir, la lame mobile peut prendre plusieurs géométries. Nous définissons une lame mobile d'un fermoir au sens de l'invention comme une lame comprenant une articulation au niveau d'une première extrémité, autour de laquelle elle pivote par rapport à une autre lame du fermoir pour le passage d'une configuration fermée à une configuration déployée du fermoir, ou inversement, et qui s'étend continument de sa première extrémité vers une deuxième extrémité dans la configuration fermée du fermoir.Depending on the architecture of the clasp, the mobile blade can take on several geometries. We define a mobile blade of a clasp within the meaning of the invention as a blade comprising an articulation at the level of a first end, around which it pivots with respect to another blade of the clasp for the passage of a closed configuration to an extended configuration of the clasp, or vice versa, and which extends continuously from its first end towards a second end in the closed configuration of the clasp.
Cette lame mobile comprend deux formes prédéfinies, c'est-à-dire que ces formes peuvent être obtenues de manière répétée et fiable, de manière automatique ou sous l'effet d'un actionnement donné d'un porteur du fermoir. Ces formes peuvent être prédéfinies de différentes manières, par les propriétés géométriques et/ou mécaniques de la lame mobile. De plus, une forme prédéfinie peut être stable ou non : une forme est stable lorsqu'elle est automatiquement maintenue lorsqu'elle est atteinte, en l'absence de toute contrainte exercée par un porteur.This mobile blade comprises two predefined shapes, that is to say that these shapes can be obtained repeatedly and reliably, automatically or under the effect of a given actuation of a wearer of the clasp. These shapes can be predefined in different ways, by the geometric and/or mechanical properties of the moving blade. Moreover, a predefined shape can be stable or not: a shape is stable when it is automatically maintained when it is reached, in the absence of any constraint exerted by a wearer.
L'invention a été illustrée à partir d'un fermoir destiné à un bracelet, ce bracelet étant destiné à une montre-bracelet. L'invention porte ainsi aussi sur un bracelet et sur une montre-bracelet en tant que tels, comportant un tel fermoir. En variante, le fermoir peut être associé à tout autre bracelet, pour tout autre objet qu'une montre à fixer sur un poignet ou toute autre partie. Cet objet peut être une « smartwatch », un accessoire de plongée sous-marine tel un profondimètre ou un ordinateur de plongée sous-marine par exemple, ou encore un composant de joaillerie.The invention has been illustrated on the basis of a clasp intended for a bracelet, this bracelet being intended for a wristwatch. The invention thus also relates to a bracelet and to a wristwatch as such, comprising such a clasp. Alternatively, the clasp can be associated with any other bracelet, for any object other than a watch to be attached to a wrist or any other part. This object can be a “smartwatch”, a scuba diving accessory such as a depth gauge or a scuba diving computer for example, or even a jewelry component.
Claims (16)
- A clasp having deployant blades for a wristband, characterized in that it comprises at least two blades (1, 2), one movable blade (1) being articulated on a second blade (2) in the area of first extremities, the clasp being able to adopt a first closed configuration, in which:- The movable blade (1) exhibits a first predefined form (C1) and extends in a continuous manner for its entire length, substantially along the surface of the second blade (2);- The second extremity of the movable blade (1) is maintained in position by the clasp;the clasp being able to adopt a second, deployed configuration, in which the second extremity of the movable blade (1) is free, the movable blade (1) thus having the ability to be moved away from the surface of the second blade (2),characterized in that, in the second deployed configuration, the movable blade (1) is able to exhibit a second predefined form (C2), different from the first predefined form (C1), in order to optimize the passage surface for the hand of a person wearing the clasp.
- The clasp as claimed in the preceding claim, characterized in that the movable blade exhibits a first, convex, curved form (C1), when viewed from the wrist, in the deployed configuration of the clasp, able to conform to the form of the wrist of a person wearing the clasp in the closed configuration of the clasp, and may exhibit a second form (C2) comprising at least one substantially rectilinear and/or concave part, when viewed from the wrist, in the deployed configuration of the clasp and/or comprising at least one part projecting beyond a segment (S) delimited by the two extremities of the movable blade (1), thereby moving away from the wrist of a person wearing the clasp in the deployed configuration of the clasp.
- The clasp as claimed in one of the preceding claims, characterized in that the first form (C1) and/or the second form (C2) of the movable blade (1) is a stable predefined form.
- The clasp as claimed in one of the preceding claims, characterized in that the movable blade (1) comprises at least two parts (11, 12) that are interconnected in an articulated manner by an articulation (A11).
- The clasp as claimed in the preceding claim, characterized in that each part (11, 12) of the movable blade (1) comprises respectively two abutments (11a, 11b) (12a, 12b) in the area of their articulation (A11), each delimiting the position of the two parts (11, 12) of the movable blade (1) and defining the two predefined forms.
- The clasp as claimed in claim 4 or 5, characterized in that the movable blade (1) comprises at least one articulation comprising an axis of articulation, about which two parts (11, 12) of the movable blade (1) are interconnected in an articulated manner.
- The clasp as claimed in claim 4 or 5, characterized in that the movable blade (1) comprises at least one articulation comprising a zone of reduced thickness forming a pivot coupling between two parts (11, 12) of the movable blade (1) disposed to either side of said zone of reduced thickness.
- The clasp as claimed in one of claims 4 to 7, characterized in that at least one articulation permits a rotation having an amplitude of between 20 and 80 degrees inclusive between two articulated parts (11, 12) of the movable blade (1).
- The clasp as claimed in one of claims 1 to 3, characterized in that the movable blade (1) comprises at least one zone of inflection (Z1) permitting the elastic deformation of the movable blade (1).
- The clasp as claimed in the preceding claim, characterized in that the movable blade (1) exhibits a second stable position (C2) intended for the deployed configuration of the clasp, in that the movable blade (1) comprises at least two parts (11, 12) distributed around a zone of inflection (Z1).
- The clasp as claimed in one of claims 9 or 10, characterized in that the movable blade (1) comprises two parts (11, 12) exhibiting a different curve and/or different thicknesses and/or are of opposed convexities.
- The clasp as claimed in one of claims 9 to 11, characterized in that the movable blade (1) comprises two parts (11, 12) of different respective thicknesses (e1, e2), meeting the following conditions:e1 < e2/2, or e1 < e2/3;and in that the thickness e2 of the second part (12) of the movable blade (1) is close to the thickness e3 of the second blade (2).
- The clasp as claimed in one of the preceding claims, characterized in that the movable blade (1) is made from a super-elastic alloy, for example a nickel-titanium alloy such as Nitinol, and/or in that the movable blade (1) exhibits a length of between 20 and 60 mm.
- The clasp as claimed in one of the preceding claims, characterized in that the clasp is a clasp having two deployant blades of substantially the same length, or in that the clasp is a clasp having two blades that are movable about a third center blade.
- A wristband, characterized in that the it comprises at least one clasp having deployant blades as claimed in one of the preceding claims.
- A wristwatch, characterized in that it comprises at least one wristband as claimed in the preceding claim.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP17177805.3A EP3420839B1 (en) | 2017-06-26 | 2017-06-26 | Clasp for wristwatch |
JP2018119523A JP7250445B2 (en) | 2017-06-26 | 2018-06-25 | watch clasp |
US16/016,986 US10791806B2 (en) | 2017-06-26 | 2018-06-25 | Clasp for wristwatch |
CN201810673679.9A CN109106012B (en) | 2017-06-26 | 2018-06-26 | Fastening for watch |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP17177805.3A EP3420839B1 (en) | 2017-06-26 | 2017-06-26 | Clasp for wristwatch |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3420839A1 EP3420839A1 (en) | 2019-01-02 |
EP3420839B1 true EP3420839B1 (en) | 2022-10-05 |
Family
ID=59215641
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17177805.3A Active EP3420839B1 (en) | 2017-06-26 | 2017-06-26 | Clasp for wristwatch |
Country Status (4)
Country | Link |
---|---|
US (1) | US10791806B2 (en) |
EP (1) | EP3420839B1 (en) |
JP (1) | JP7250445B2 (en) |
CN (1) | CN109106012B (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110840024A (en) * | 2019-11-27 | 2020-02-28 | 安徽薇娅智能科技有限公司 | Novel intelligence bracelet and connecting band structure thereof |
CH717148B1 (en) | 2020-02-19 | 2024-02-29 | Erbas Sa | Clasp for bracelet, especially a watch. |
CN113303571B (en) * | 2020-02-27 | 2023-02-10 | 华为技术有限公司 | Coupling mechanism and wearable equipment |
EP3928652B1 (en) * | 2020-06-23 | 2023-04-19 | Rolex Sa | Locking device for a bracelet clasp |
DE102021117784B4 (en) | 2021-07-09 | 2023-04-27 | Johann Fleis | watch device |
EP4159080B1 (en) | 2021-10-01 | 2024-03-27 | Omega SA | Adjustable bracelet clasp |
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DE68911590D1 (en) * | 1988-05-31 | 1994-02-03 | Gtf Srl | Clasp for watch straps, bracelets, jewelry or the like. |
FR2634107B1 (en) * | 1988-07-15 | 1990-11-02 | Omega Sa | FENDER ADJUSTABLE BRACELET CLASP |
FR2705873B1 (en) * | 1993-06-03 | 1995-08-11 | Ferrario Luigi | Folding clasp type bracelet. |
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CN1145436C (en) * | 1998-07-02 | 2004-04-14 | 西铁城钟表股份有限公司 | Rotation stopper for opening and closing plates in center fixing device of band-shaped ornament |
EP1188389B1 (en) * | 2000-08-22 | 2005-02-09 | Richemont International S.A. | Strap clasp |
FR2842081B1 (en) * | 2002-07-11 | 2004-08-27 | Chatelain Sa G & F | AUTOMATIC CLASP FOR A WATCH STRAP |
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EP3011857B1 (en) * | 2014-10-24 | 2017-03-15 | The Swatch Group Management Services AG | Bracelet clasp |
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2017
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2018
- 2018-06-25 JP JP2018119523A patent/JP7250445B2/en active Active
- 2018-06-25 US US16/016,986 patent/US10791806B2/en active Active
- 2018-06-26 CN CN201810673679.9A patent/CN109106012B/en active Active
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Also Published As
Publication number | Publication date |
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JP2019030636A (en) | 2019-02-28 |
CN109106012A (en) | 2019-01-01 |
CN109106012B (en) | 2022-12-27 |
EP3420839A1 (en) | 2019-01-02 |
JP7250445B2 (en) | 2023-04-03 |
US20180368540A1 (en) | 2018-12-27 |
US10791806B2 (en) | 2020-10-06 |
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