EP3777599A1 - Resilient joint for clockwork assembly - Google Patents
Resilient joint for clockwork assembly Download PDFInfo
- Publication number
- EP3777599A1 EP3777599A1 EP19192106.3A EP19192106A EP3777599A1 EP 3777599 A1 EP3777599 A1 EP 3777599A1 EP 19192106 A EP19192106 A EP 19192106A EP 3777599 A1 EP3777599 A1 EP 3777599A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- clasp
- springs
- elastic element
- elastic
- movable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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- 239000003292 glue Substances 0.000 claims 1
- 238000003466 welding Methods 0.000 claims 1
- 239000000463 material Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008447 perception Effects 0.000 description 2
- 230000035807 sensation Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 210000000707 wrist Anatomy 0.000 description 1
Images
Classifications
-
- 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
- A44C5/0053—Flexible straps
-
- 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
-
- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
- A44C11/00—Watch chains; Ornamental chains
-
- 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
- A44C5/02—Link constructions
- A44C5/04—Link constructions extensible
-
- 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
- A44C5/02—Link constructions
- A44C5/10—Link constructions not extensible
- A44C5/107—Link constructions not extensible with links made of more than two elements including connecting elements
-
- 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
- A44C5/14—Bracelets; Wrist-watch straps; Fastenings for bracelets or wrist-watch straps characterised by the way of fastening to a wrist-watch or the like
-
- 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
-
- 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
- G04B37/14—Suspending devices, supports or stands for time-pieces insofar as they form part of the case
- G04B37/1486—Arrangements for fixing to a bracelet
Definitions
- the present invention relates to an arrangement for an elastic articulated connection between two components of a watch assembly, more precisely two components of a watch dressing device, in particular for a wristwatch strap, arranged either at the level of a clasp of this bracelet, or at the level of the links of this bracelet. It also relates to a covering device, or even more generally a horological device, a clasp, a bracelet and a wristwatch as such comprising such an arrangement.
- the document EP1654950 describes, for example, a solution for implementing the elastic locking and unlocking of two movable blades of a bracelet clasp.
- a first movable blade is locked in the folded position on a second blade by the picking of a locking hook against a hooking stud under the effect of one or more elastic elements.
- This embodiment makes it possible to guarantee very good locking security while optimizing the force required for opening the clasp, which makes it a very satisfactory solution in terms of closing and handling security.
- This second adjustment makes it possible in particular to improve the comfort of the wearer by allowing easy modification of the initial adjustment so as to compensate for any changes in the periphery of the wrist, which depends for example on the temperature or on the ambient pressure, and on the efforts made with it. the arm by the wearer of the bracelet.
- This solution is based here on an elastic articulation between two covering components, in particular between two links of a bracelet.
- a general object of the invention is to provide an elastic articulated connection solution between two components of a watch assembly, which achieves an optimum compromise between the performance of the elastic assembly and its perceived quality.
- the invention is based on an arrangement for an elastic articulated connection between two components of a watch assembly, characterized in that it comprises at least one elastic element comprising at least two superposed springs.
- the invention is based on the use of at least one elastic element comprising at least two superposed springs, as will be illustrated in detail below, making it possible to achieve an advantageous behavior relative to the elastic forces used during the elastic articulation between two components of a watchmaking device.
- these two springs are distinct.
- one of the two springs covers the entire surface of the other of the two springs.
- the figures 1 to 7 illustrate a clasp 200 for a bracelet according to a first embodiment of the invention, comprising two articulated blades 6a, 6b.
- This clasp has an operation similar to that described by the document EP1654950 and will not be described in detail. It differs mainly from this solution of the state of the art by the elastic elements comprising two superimposed springs, as will be detailed below.
- the clasp 200 has no cover. It is provided for the direct arrangement of the end links of two strands of a bracelet 300 on their respective blade.
- the bracelet comprises in particular a mobile link 3, mounted movable on a first pin 1 of first axis A1, relative to a center link 4 and to two edge links 5a, 5b secured to each other by means in particular of a third pin 9.
- a locking hook 31 is secured to less play in the mobile mesh 3 by means of a second pin or rivet 2 of second axis A2. This assembly is placed on a first movable blade 6a of the clasp 200.
- the figures 1 to 6 show a first closed configuration of the clasp 200, in which the locking hook 31 cooperates with a fastening stud 7 integral with a second blade 6b of the clasp.
- the articulation of the movable link 3, in particular of the hook 31, relative to the center link 4 forms an elastic joint 100 comprising two elastic elements 10, 10 'which are identical or substantially identical.
- Each elastic element 10, 10 ' is prestressed between, on the one hand, the locking hook 31 and, on the other hand, the center link 4 of the bracelet, integral with the edge links 5a, 5b.
- This center mesh 4 forms a fixed stop 4a of the arrangement.
- Each elastic element thus exerts a force on the locking hook 31 which tends to bring it and hold it in the closed configuration in which it engages with the hooking stud 7.
- the clasp according to the first embodiment comprises two elastic elements 10, 10 'arranged substantially symmetrically on either side of a longitudinal median plane P of the clasp.
- the elastic joint 100 therefore comprises two elastic elements 10, 10 'which are substantially identical.
- the elastic element 10 comprises two superimposed springs 10a, 10b. These two springs 10a, 10b are both in the form of a curved blade. They include a rounded shape, allowing them to be arranged around the second axis A2 within a housing 33 of the hook 31.
- the two springs 10a ', 10b' are both substantially in the form of a curved blade. They include a rounded shape, allowing them to be arranged around the second axis A2 within a housing 33 'of the hook 31, as is more particularly visible on the figure. figure 6 .
- the two springs 10a, 10b are separate. According to the embodiment, the two springs 10a, 10b belong to separate elements. Each spring 10a, 10b forms a unitary and / or monobloc assembly.
- the first spring 10b is said to be an inner spring because it is the closest to the second axis A2. It is covered by the second spring 10a, called the outer spring.
- This second outer spring 10a or casing advantageously covers the entire surface of the first inner spring 10b. It has a length greater than that of the first interior spring 10b.
- a first end 102a of the second spring 10a allows the spring to rest on a first stop 4a of the center link 4, forming a fixed stop.
- a second end 101a of the second spring 10a allows a bearing on a stop 33a of the first housing 33 of the hook 31. This spring is thus prestressed between its two ends 101a, 102a and thus transmits a stress on the hook 31, as mentioned previously.
- the second outer spring 10a is further supported on the first spring 10b, at the level of a contact surface, which likewise transmits an elastic force to the second outer spring 10a.
- the behavior of the elastic element 10 thus corresponds to the combination of the behavior of the two springs 10a, 10b.
- the figure 7 illustrates the operation of the arrangement forming an elastic articulated connection around said first axis of rotation A1, involving two components 3, 4 of a clasp, said two components being linked together in an elastic articulated connection around an axis A1 of rotation, by through two elastic elements 10, 10 '.
- the articulated connection fulfills the function of locking / unlocking the clasp.
- the figures 1 to 6 show the clasp in a first closed configuration, in which the locking hook 31 engages with a hooking element 7 of the blade 6b of the clasp.
- the opening of the clasp 200 is effected by means of a gripping member 32 integral with the movable link 3.
- the actuation of the gripping member 32 requires a force Fd which induces a rotation of the movable link 3 ( clockwise on the figure 7 ) around the axis A1, which induces the retraction of the locking hook 31 of the locking pin 7.
- the necessary opening or unlocking force Fd is here very mainly given by the sum of the compressive forces F induced by the two elastic elements 10, 10 'of two springs 10a, 10b, 10a', 10b ', under the effect of the movement of the mobile link 3, and therefore of the hook 31, relative to the center link 4.
- This force F is exerted by the springs at the level of the stopper 4a on the center mesh 4. It is oriented substantially parallel to the direction of superposition of the two springs 10b, 10a, this direction being considered on the ends of the two springs near this stopper 4a.
- the two elastic elements 10, 10 ' are pre-stressed by the stop 4a of the center link 4 and the stops 33a, 33a' respectively of the housings 33, 33 '.
- the two springs 10a, 10b are not fixed to one another. Consequently, the second outer spring 10a is completely free to move relative to the first spring 10b during the compression of the springs.
- Such an arrangement makes it possible to distribute the stresses within the blades forming the springs as well as possible, while maximizing the stiffness of each spring, and therefore the opening or unlocking force Fd of the clasp for a given angle of rotation of the mobile link. 3.
- such a configuration makes it possible to provide an elastic articulated connection which is particularly easy to implement, by simply inserting a second spring 10b, 10b 'between a first spring 10a, 10a' and an axis A2 of the pin 2, as schematically represented by the figure 8 .
- the figure 9 illustrates a graph showing forces Fda, Fdb, Fdc for unlocking or opening a clasp as shown in the figures 1 and 2 , for a rotation angle of 15 ° of the mobile mesh 3, for three types of elastic joints A, B, C different.
- the joint A corresponds to a first elastic joint known from the prior art, the latter comprising two identical springs A10, A10 ', aligned, and arranged substantially symmetrically on either side of a longitudinal median plane P of a clasp as shown on the figures 1 and 2 , a spring A10 being shown in the section of the figure 10 .
- the springs A10, A10 ' are in the form of a single curved blade, and having a thickness of 0.18 mm.
- Joint B corresponds to a second elastic joint known from the prior art, similar to joint A, but comprising two springs B10, B10 'each having a thickness of 0.21 mm, instead of the 0.18 mm of joint A
- This joint B is represented by the section of the figure 11 , which leaves visualize the spring B10, of greater thickness, a thickness which is exaggerated in this figure to better illustrate the difference.
- the joint C corresponds to the elastic joint according to the first embodiment of the invention, as illustrated by the figures 4 and 5 , resting on two pairs of superimposed springs, the outer springs 10a, 10a 'being two curved leaves having a thickness of 0.18 mm and the inner springs 10b, 10b' being two curved leaves having a thickness of 0.14 mm.
- the springs or leaves are here made from the same material, steel, in particular Nivaflex.
- the force Fdc produced by the joint C of the invention is increased by the order of 50% with respect to the force Fda produced by the joint A, while inducing stresses lower than the elastic limit of the material constituting the leaves of the spring.
- the force Fdb produced by the joint B is, for its part, substantially equal to the force Fdc.
- the stresses accordinging to the Von Mises criterion are not admissible with regard to the elastic limit of the material constituting the spring, which is of the order of 2500 MPa for the Nivaflex material.
- the increase in the opening or unlocking force of such an unlocking device essentially involves a thickening of all or part of the springs taking part in the elastic joint, which may lead to a risk of plasticization of said blades beyond a given thickness, as is the case for the joint B.
- the maximum opening force of the unlocking device of the clasp depends on the maximum stresses which each of said leaves forming a spring is capable of supporting, which may be limiting with regard to the expected level of opening force.
- the articulation C according to the invention comprises elastic elements each comprising two superposed springs, these two springs having a different thickness.
- these springs can alternatively have identical thicknesses. They can also have the same width La, La ', Lb, Lb' as illustrated by figure 8 , or not.
- the materials of the superposed springs 10a, 10b may also be identical or not.
- the curves of the figure 9 are offered by way of example, to illustrate the effect of the invention.
- the at least two springs of the elastic element according to the invention have any other thickness Ea, Eb, Ea ', Eb' advantageously between 0.1 mm and 0.25 mm, or even between 0.12 mm and 0.2 mm, or even between 0.13 mm and 0.19 mm.
- the at least two springs of the elastic element are made of steel, in particular of Nivaflex.
- the elastic element according to the invention can take other forms than that shown.
- this elastic element can comprise more than two superimposed springs. It can include, for example, three, four, or more superimposed springs.
- the invention is based on the use of an elastic element with multiple superimposed springs.
- the articulation according to the invention can comprise a single elastic element.
- the mobile mesh 3 can thus take the form of a gripping member provided with a locking hook
- the center mesh 4 can take the form of a cover on which said gripping member provided with said locking hook is pivoted. around an axis 1.
- the axis A1 can advantageously coincide with the axis A2.
- each spring can take any other form.
- two superimposed springs 10a, 10b may be in the form of leaves or beams, that is to say flat and thin elements, intended to be deformed in bending during the rotation of a first component 3, 3 * relative to a second component 4, 4 *.
- the blades can, for example, be made punctually integral at the level of their embedding zone E adjacent to the components 3 and 4. Furthermore, they can have a constant section or not.
- an elastic element according to the concept of the invention can be used in any elastic articulation between two watch components of a covering device.
- the figures 13 to 15 illustrate by way of example the implementation of the concept of the invention in a precision extension device 200 ′ of the length of a bracelet, as described in the document EP2606762 , incorporated by reference, which will not be fully described.
- the articulation comprises a single elastic element 10 "comprising a set of two superimposed springs 10a", 10b ". These two superimposed springs are arranged around a pin 1 '(or axis of rotation) of axis A1 ', forming an axis of rotation of a mobile link 3' of a bracelet 300 '.
- Each spring has a V-shape, obtained by a curved blade, the base of which is rounded to match a part of the rounded surface of the pin 1 '.
- the movable link 3 ' is capable of being actuated in rotation about the axis A1' relative to a link 4 'movable in translation in the longitudinal direction of a cover 6' of a clasp by means of a guide pin A2 '.
- first and second ends 101a “, 102a” of the second outer spring 10a “are prestressed respectively against a first stop 3a 'of the mobile link 3' and a second stop 4a 'of the mesh 4 'movable in translation, so as to press finger 31' against toothing 7 '.
- the length of the bracelet 300 ′ can thus be adjusted.
- the gains provided by the elastic element 10 are the same as those of the elastic elements of the first embodiment, namely in particular an opening force of the extension device 200 'which is maximized in a given size, and while retaining satisfactory stress levels within the material constituting the leaves of the spring.
- the elastic element can advantageously be arranged around an axis of rotation of two components of a watch covering device taking part in the articulation.
- elastic can advantageously be arranged around an axis of rotation of two components of a watch covering device taking part in the articulation.
- the elastic element could be arranged in an offset manner and / or separate from this axis of rotation. It could be arranged around any other axis, or independently of an axis.
- the at least two springs of the elastic element are advantageously in the form of two leaves.
- a first blade covers the whole of a second blade.
- the superposition of the slats may be only partial.
- the at least two springs of the elastic element advantageously have a thickness of between 0.1 mm and 0.25 mm, or even between 0.12 mm and 0.2 mm, or even between 0.13 mm and 0.19 mm.
- these at least two springs are made of steel, in particular of Nivaflex.
- the invention has been illustrated from a bracelet clasp associated with a wristwatch, which is moreover also concerned as such by this invention, and more precisely at the level of the locking mechanism of this clasp, or at a wristband extension device.
- this principle can be implemented for any elastic link articulated between two watch components, whether this movement is a pure rotation or more complex, such as a rotation combined with another movement.
- This principle can, moreover, be implemented for the implementation of an elastic joint 100 "within the movement.
- an elastic joint 100 can be used for the definition of a device. 200 "calendar cam rocker as shown in figure 16 .
- this device 200 can comprise a rocker 3" pivoted about a first axis A1 “relative to a blank 4" of the movement.
- the end 3a “of the rocker 3” is elastically biased against a calendar cam 5 "by an elastic element 10 * having the particularity of comprising two U-shaped springs 10a *, 10b * arranged around it 'a second axis A2 "within a dwelling (not shown on the figure 16 ) of the blank 4 ", and prestressed between the rocker 3" and a stop 4a “of the blank 4".
- the expected gains are the same as those described previously, namely a return force F "of the elastic element 10 * maximized while maintaining acceptable stress levels within the leaves of the springs 10a *, 10b *.
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- General Physics & Mathematics (AREA)
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- Clamps And Clips (AREA)
- Springs (AREA)
Abstract
Agencement comprenant deux composants (3, 4 ; 3', 4') d'un dispositif horloger et un axe de rotation (A1 ; A1'), lesdits deux composants (3, 4 ; 3', 4') étant liés entre eux selon une liaison articulée élastique (100 ; 100') autour dudit axe de rotation (A1 ; A1'), l'agencement comprenant de plus un élément élastique (10, 10' ; 10") tel que le mouvement relatif desdits deux composants (3, 4 ; 3', 4') se fait à l'encontre dudit élément élastique (10, 10' ; 10"), caractérisé en ce que ledit élément élastique (10, 10' ; 10") comprend au moins deux ressorts (10a, 10b, 10a', 10b' ; 10a", 10b") superposés, chacun de ces au moins deux ressorts (10a, 10b, 10a', 10b' ; 10a", 10b") se présentant comme un élément distinct.Arrangement comprising two components (3, 4; 3 ', 4') of a timepiece device and an axis of rotation (A1; A1 '), said two components (3, 4; 3', 4 ') being linked together according to an elastic articulated connection (100; 100 ') about said axis of rotation (A1; A1'), the arrangement further comprising an elastic element (10, 10 '; 10 ") such that the relative movement of said two components ( 3, 4; 3 ', 4') is made against said elastic element (10, 10 '; 10 "), characterized in that said elastic element (10, 10'; 10") comprises at least two springs (10a, 10b, 10a ', 10b'; 10a ", 10b") superimposed, each of these at least two springs (10a, 10b, 10a ', 10b'; 10a ", 10b") being presented as a separate element.
Description
La présente invention concerne un agencement pour une liaison articulée élastique entre deux composants d'un assemblage horloger, plus précisément deux composants d'un dispositif d'habillage horloger, notamment pour un bracelet de montre-bracelet, disposé soit au niveau d'un fermoir de ce bracelet, soit au niveau des mailles de ce bracelet. Elle porte aussi sur un dispositif d'habillage, voire plus généralement un dispositif horloger, un fermoir, un bracelet et une montre-bracelet en tant que tels comprenant un tel agencement.The present invention relates to an arrangement for an elastic articulated connection between two components of a watch assembly, more precisely two components of a watch dressing device, in particular for a wristwatch strap, arranged either at the level of a clasp of this bracelet, or at the level of the links of this bracelet. It also relates to a covering device, or even more generally a horological device, a clasp, a bracelet and a wristwatch as such comprising such an arrangement.
Il existe plusieurs situations dans lesquelles il est nécessaire de mettre en oeuvre une articulation élastique entre deux composants d'un dispositif d'habillage horloger, notamment de montre-bracelet.There are several situations in which it is necessary to implement an elastic articulation between two components of a watch covering device, in particular of a wristwatch.
Le document
Cette réalisation permet de garantir une très bonne sécurité de verrouillage tout en optimisant la force requise pour l'ouverture du fermoir, ce qui en fait une solution très satisfaisante en termes de sécurité de fermeture et de manipulation.This embodiment makes it possible to guarantee very good locking security while optimizing the force required for opening the clasp, which makes it a very satisfactory solution in terms of closing and handling security.
D'autre part, dans une solution avec fermoir, il existe en général un premier réglage du positionnement du fermoir relativement au bracelet, dit réglage conventionnel. Cependant, la longueur finale obtenue n'est souvent pas parfaite et non optimale. Pour cela, des fermoirs existants, comme celui décrit par le document
Finalement, ces solutions existantes d'articulation élastique sont très performantes mais il existe toujours un besoin d'amélioration de ces solutions. En effet, il est toujours recherché un compromis optimal entre la sécurité et la fiabilité du fonctionnement de ces solutions et la perception d'un utilisateur lors de sa manipulation de ces solutions, cette perception ayant un lien direct avec l'impression de qualité perçue des produits incorporant de telles articulations élastiques.Finally, these existing elastic joint solutions are very efficient but there is still a need to improve these solutions. Indeed, an optimal compromise is always sought between the safety and reliability of the operation of these solutions and the perception of a user when handling these solutions, this perception having a direct link with the impression of perceived quality of the solutions. products incorporating such elastic joints.
Ainsi, un objet général de l'invention est de proposer une solution de liaison articulée élastique entre deux composants d'un assemblage horloger, qui atteint un compromis optimal entre la performance de l'assemblage élastique et sa qualité perçue.Thus, a general object of the invention is to provide an elastic articulated connection solution between two components of a watch assembly, which achieves an optimum compromise between the performance of the elastic assembly and its perceived quality.
Notamment, une telle solution est plus particulièrement recherchée pour une application au sein d'un fermoir de bracelet.In particular, such a solution is more particularly sought after for an application within a bracelet clasp.
A cet effet, l'invention repose sur un agencement pour une liaison articulée élastique entre deux composants d'un assemblage horloger, caractérisé en ce qu'il comprend au moins un élément élastique comprenant au moins deux ressorts superposés.To this end, the invention is based on an arrangement for an elastic articulated connection between two components of a watch assembly, characterized in that it comprises at least one elastic element comprising at least two superposed springs.
L'invention est plus précisément définie par les revendications.The invention is more 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 en perspective de dessus d'un fermoir selon un premier mode de réalisation de l'invention. - La
figure 2 représente une vue de dessus du fermoir selon le premier mode de réalisation de l'invention. - La
figure 3 représente une vue en coupe III-III du fermoir dans une première configuration du fermoir selon le premier mode de réalisation de l'invention. - La
figure 4 représente une vue agrandie de détails de la vue en coupe de lafigure 3 . - La
figure 5 représente une vue en coupe V-V du fermoir dans une première configuration du fermoir selon le premier mode de réalisation de l'invention. - La
figure 6 représente une vue agrandie de détails de la vue en coupe de lafigure 5 . - La
figure 7 représente une vue similaire à celle de lafigure 4 lors de l'actionnement de l'articulation élastique du fermoir pour son passage de la première configuration vers une deuxième configuration. - La
figure 8 représente une vue en perspective éclatée d'un élément élastique de l'articulation élastique selon le premier mode de réalisation de l'invention. - La
figure 9 illustre un graphique faisant état de forces de déverrouillage ou d'ouverture d'un fermoir selon le premier mode de réalisation de l'invention en comparaison avec des solutions de l'état de la technique. - Les
figures 10 et11 représentent des vues en coupe d'articulations élastiques selon des solutions de l'état de la technique dont les forces de déverrouillage sont illustrées par lafigure 9 . - La
figure 12 représente schématiquement un élément élastique selon une variante de réalisation de l'invention. - La
figure 13 représente une vue en coupe d'un fermoir dans une première configuration selon un deuxième mode de réalisation de l'invention. - La
figure 14 représente une vue de détails de la vue en coupe de lafigure 13 , illustrant l'articulation élastique du fermoir selon le deuxième mode de réalisation de l'invention. - La
figure 15 représente une vue en coupe semblable à lafigure 14 , illustrant l'articulation élastique du fermoir selon le deuxième mode de réalisation de l'invention dans une deuxième configuration. - La
figure 16 représente une vue d'un dispositif de bascule de came de calendrier selon une variante de réalisation de l'invention.
- The
figure 1 shows a perspective view from above of a clasp according to a first embodiment of the invention. - The
figure 2 shows a top view of the clasp according to the first embodiment of the invention. - The
figure 3 shows a sectional view III-III of the clasp in a first configuration of the clasp according to the first embodiment of the invention. - The
figure 4 shows an enlarged view of details of the section view of thefigure 3 . - The
figure 5 shows a sectional view VV of the clasp in a first configuration of the clasp according to the first embodiment of the invention. - The
figure 6 shows an enlarged view of details of the section view of thefigure 5 . - The
figure 7 represents a view similar to that of thefigure 4 during actuation of the elastic articulation of the clasp for its passage from the first configuration to a second configuration. - The
figure 8 shows an exploded perspective view of an elastic element of the elastic joint according to the first embodiment of the invention. - The
figure 9 illustrates a graph showing forces for unlocking or opening a clasp according to the first embodiment of the invention in comparison with solutions of the state of the art. - The
figures 10 and11 represent sectional views of elastic joints according to solutions of the state of the art, the unlocking forces of which are illustrated byfigure 9 . - The
figure 12 schematically represents an elastic element according to an alternative embodiment of the invention. - The
figure 13 shows a sectional view of a clasp in a first configuration according to a second embodiment of the invention. - The
figure 14 shows a detail view of the sectional view of thefigure 13 , illustrating the elastic articulation of the clasp according to the second embodiment of the invention. - The
figure 15 shows a sectional view similar to thefigure 14 , illustrating the elastic articulation of the clasp according to the second embodiment of the invention in a second configuration. - The
figure 16 shows a view of a calendar cam rocker device according to an alternative embodiment of the invention.
L'invention repose sur l'utilisation d'au moins un élément élastique comprenant au moins deux ressorts superposés, comme cela va être illustré en détail par la suite, permettant d'atteindre un comportement avantageux relativement aux efforts élastiques mis en oeuvre lors de l'articulation élastique entre deux composants d'un dispositif d'habillage horloger. Avantageusement, ces deux ressorts sont distincts. Avantageusement encore, l'un des deux ressorts recouvre l'entier de la surface de l'autre des deux ressorts.The invention is based on the use of at least one elastic element comprising at least two superposed springs, as will be illustrated in detail below, making it possible to achieve an advantageous behavior relative to the elastic forces used during the elastic articulation between two components of a watchmaking device. Advantageously, these two springs are distinct. Again advantageously, one of the two springs covers the entire surface of the other of the two springs.
Les
Le fermoir 200 est dénué de couvercle. Il est prévu pour l'agencement direct des mailles d'extrémité de deux brins d'un bracelet 300 sur leur lame respective. Le bracelet comprend notamment une maille mobile 3, montée mobile sur une première goupille 1 de premier axe A1, relativement à une maille de centre 4 et à deux mailles de bord 5a, 5b solidarisées entre elles par l'intermédiaire notamment d'une troisième goupille 9. Un crochet de verrouillage 31 est solidarisé à moindre jeu à la maille mobile 3 par le biais d'une deuxième goupille ou rivet 2 de deuxième axe A2. Cet ensemble est disposé sur une première lame mobile 6a du fermoir 200.The
Les
L'articulation de la maille mobile 3, notamment du crochet 31, relativement à la maille de centre 4 forme une articulation élastique 100 comprenant deux éléments élastiques 10, 10' identiques ou sensiblement identiques. Chaque élément élastique 10, 10' est précontraint entre d'une part le crochet de verrouillage 31 et d'autre part la maille de centre 4 du bracelet, solidaire des mailles de bord 5a, 5b. Cette maille de centre 4 forme une butée 4a fixe de l'agencement. Chaque élément élastique exerce ainsi une force sur le crochet de verrouillage 31 qui tend à l'amener et le maintenir dans la configuration fermée dans laquelle il est en prise avec le plot d'accrochage 7. Comme cela apparaît sur la
Dans ce mode de réalisation, l'articulation élastique 100 comprend donc deux éléments élastiques 10, 10' sensiblement identiques. L'élément élastique 10 comprend deux ressorts 10a, 10b superposés. Ces deux ressorts 10a, 10b se présentent tous deux sous la forme d'une lame courbée. Ils comprennent une forme arrondie, leur permettant un agencement autour du deuxième axe A2 au sein d'un logement 33 du crochet 31. De façon similaire, les deux ressorts 10a', 10b' se présentent tous deux sensiblement sous la forme d'une lame courbée. Ils comprennent une forme arrondie, leur permettant un agencement autour du deuxième axe A2 au sein d'un logement 33' du crochet 31, comme cela est plus particulièrement visible sur la
Les deux ressorts 10a, 10b sont distincts. Selon le mode de réalisation, les deux ressorts 10a, 10b appartiennent à des éléments distincts. Chaque ressort 10a, 10b forme un ensemble unitaire et/ou monobloc.The two
Le premier ressort 10b est dit ressort intérieur, car il est le plus proche du deuxième axe A2. Il est recouvert par le deuxième ressort 10a, dit ressort extérieur. Ce deuxième ressort 10a extérieur chemise ou recouvre avantageusement l'entier de la surface du premier ressort 10b intérieur. Il présente une longueur supérieure à celle du premier ressort 10b intérieur. Une première extrémité 102a du deuxième ressort 10a permet un appui du ressort sur une première butée 4a de la maille de centre 4, formant une butée fixe. Une deuxième extrémité 101a du deuxième ressort 10a permet un appui sur une butée 33a du premier logement 33 du crochet 31. Ce ressort est ainsi précontraint entre ses deux extrémités 101a, 102a et transmet ainsi une contrainte sur le crochet 31, comme mentionné précédemment. Le deuxième ressort 10a extérieur est de plus en appui sur le premier ressort 10b, au niveau d'une surface de contact, qui transmet de même un effort élastique au deuxième ressort 10a extérieur. Le comportement de l'élément élastique 10 correspond ainsi à la combinaison des comportements des deux ressorts 10a, 10b.The
La
Ainsi, à l'ouverture, les deux éléments élastiques sont comprimés du fait de la rotation de la maille mobile 3 par rapport à la maille de centre 4 sous l'effet de l'organe de préhension 32. A la fermeture, l'élément élastique est comprimé du fait du contact entre le bout du crochet de verrouillage 31 et le dessus du plot d'accrochage 7. Cela provoque l'escamotage du crochet de verrouillage 31 et donc de la maille mobile 3, de sorte que le crochet de verrouillage 31 puisse se loger sous le plot d'accrochage 7. Dans tous les cas, les deux éléments élastiques 10, 10' sont précontraints par la butée 4a de la maille de centre 4 et les butées 33a, 33a' respectives des logements 33, 33'.Thus, on opening, the two elastic elements are compressed due to the rotation of the
Selon ce premier mode de réalisation, les deux ressorts 10a, 10b ne sont pas fixés l'un à l'autre. En conséquence, le deuxième ressort 10a extérieur est totalement libre de se mouvoir relativement au premier ressort 10b lors de la compression des ressorts. Un tel agencement permet de répartir au mieux les contraintes au sein des lames formant les ressorts, tout en maximisant la raideur de chaque ressort, et donc la force d'ouverture ou de déverrouillage Fd du fermoir pour un angle donné de rotation de la maille mobile 3. Par ailleurs, une telle conformation permet de proposer une liaison articulée élastique particulièrement facile à mettre en oeuvre, en intercalant simplement un deuxième ressort 10b, 10b' entre un premier ressort 10a, 10a' et un axe A2 de la goupille 2, comme représenté schématiquement par la
La
Ces trois mesures permettent d'illustrer l'avantage de l'invention. En effet, on remarque que pour un même angle α d'ouverture, par exemple 15°, la force Fdc produite par l'articulation C de l'invention, est augmentée de l'ordre de 50% en regard de la force Fda produite par l'articulation A, tout en induisant des contraintes inférieures à la limite élastique du matériau constitutif des lames du ressort. La force Fdb produite par l'articulation B est, quant à elle, sensiblement égale à la force Fdc. Toutefois, les contraintes (selon le critère de Von Mises) ne sont pas admissibles en regard de la limite élastique du matériau constitutif du ressort, qui est de l'ordre de 2500 MPa pour le matériau Nivaflex. Selon les enseignements de l'état de la technique, l'augmentation de la force d'ouverture ou de déverrouillage d'un tel dispositif de déverrouillage implique essentiellement un épaississement de tout ou partie des ressorts prenant part à l'articulation élastique, ce qui peut conduire à un risque de plastification desdites lames au-delà d'une épaisseur donnée, comme c'est le cas pour l'articulation B. Autrement dit, la force d'ouverture maximale du dispositif de déverrouillage du fermoir est tributaire des contraintes maximales qu'est susceptible de supporter chacune desdites lames formant un ressort, ce qui peut être limitant en regard du niveau de force d'ouverture escompté.These three measures make it possible to illustrate the advantage of the invention. Indeed, it is noted that for the same opening angle α, for example 15 °, the force Fdc produced by the joint C of the invention is increased by the order of 50% with respect to the force Fda produced by the joint A, while inducing stresses lower than the elastic limit of the material constituting the leaves of the spring. The force Fdb produced by the joint B is, for its part, substantially equal to the force Fdc. However, the stresses (according to the Von Mises criterion) are not admissible with regard to the elastic limit of the material constituting the spring, which is of the order of 2500 MPa for the Nivaflex material. According to the teachings of the state of the art, the increase in the opening or unlocking force of such an unlocking device essentially involves a thickening of all or part of the springs taking part in the elastic joint, which may lead to a risk of plasticization of said blades beyond a given thickness, as is the case for the joint B. In other words, the maximum opening force of the unlocking device of the clasp depends on the maximum stresses which each of said leaves forming a spring is capable of supporting, which may be limiting with regard to the expected level of opening force.
L'articulation C selon l'invention comprend des éléments élastiques comprenant chacun deux ressorts superposés, ces deux ressorts présentant une épaisseur différente. Bien entendu, ces ressorts peuvent en variante présenter des épaisseurs identiques. Ils peuvent également présenter une même largeur La, La', Lb, Lb' comme illustré par la
Les courbes de la
Il apparaît que l'articulation élastique selon l'invention présente les avantages suivants :
- Elle génère une force d'ouverture ou de déverrouillage répétable, et ce indépendamment de l'élasticité des branches dépliantes et/ou du couvercle du fermoir ;
- Elle permet de maximiser le couple de rappel et ainsi d'améliorer les sensations lors de sa manipulation ;
- Malgré ce couple de rappel augmenté par rapport à l'état de la technique, des niveaux de contraintes satisfaisants sont conservés au sein du matériau constitutif des ressorts ;
- Elle s'intègre aisément au sein de toutes les déclinaisons de fermoir dotées d'un dispositif de verrouillage mettant en oeuvre une articulation élastique.
- It generates a repeatable opening or unlocking force, regardless of the elasticity of the folding branches and / or of the cover of the clasp;
- It maximizes the return torque and thus improves the sensations when handling it;
- Despite this increased return torque compared to the state of the art, satisfactory stress levels are maintained within the material constituting the springs;
- It fits easily into all the clasp variations equipped with a locking device implementing an elastic joint.
Naturellement, l'élément élastique selon l'invention peut prendre d'autres formes que celle représentée. Tout d'abord, cet élément élastique peut comprendre plus de deux ressorts superposés. Il peut comprendre, par exemple, trois, quatre, ou plus ressorts superposés. Ainsi, l'invention repose sur l'utilisation d'un élément élastique à ressorts multiples superposés. Par ailleurs, l'articulation selon l'invention peut comprendre un unique élément élastique.Naturally, the elastic element according to the invention can take other forms than that shown. First of all, this elastic element can comprise more than two superimposed springs. It can include, for example, three, four, or more superimposed springs. Thus, the invention is based on the use of an elastic element with multiple superimposed springs. Furthermore, the articulation according to the invention can comprise a single elastic element.
Par ailleurs, l'invention peut tout naturellement être mise en oeuvre au sein d'un fermoir muni d'un couvercle. La maille mobile 3 peut ainsi prendre la forme d'un organe de préhension muni d'un crochet de verrouillage, et la maille de centre 4 peut prendre la forme d'un couvercle sur lequel est pivoté ledit organe de préhension muni dudit crochet de verrouillage autour d'un axe 1. Dans un tel fermoir, l'axe A1 peut avantageusement coïncider avec l'axe A2.Furthermore, the invention can quite naturally be implemented within a clasp provided with a cover. The
De plus, selon une variante de réalisation alternative, chaque ressort peut prendre toute autre forme. Par exemple, comme illustré par la
Naturellement, un élément élastique selon le concept de l'invention peut être utilisé dans toute articulation élastique entre deux composants horlogers d'un dispositif d'habillage. Ainsi, les
Les
La maille mobile 3' est susceptible d'être actionnée en rotation autour de l'axe A1' relativement à une maille 4' mobile en translation selon la direction longitudinale d'un couvercle 6' de fermoir par le biais d'un axe de guidage A2'. La coopération d'un doigt 31' de la maille mobile 3' avec une dent 7a' d'une denture 7' du couvercle 6', sous l'effet de l'articulation élastique 100', permet de configurer le bracelet 300' selon une longueur prédéfinie. Pour ce faire, les première et deuxième extrémités 101a", 102a" du deuxième ressort 10a" extérieur sont précontraintes respectivement à l'encontre d'une première butée 3a' de la maille mobile 3' et d'une deuxième butée 4a' de la maille 4' mobile en translation, de sorte à plaquer le doigt 31' à l'encontre de la denture 7'.The movable link 3 'is capable of being actuated in rotation about the axis A1' relative to a link 4 'movable in translation in the longitudinal direction of a cover 6' of a clasp by means of a guide pin A2 '. The cooperation of a finger 31 'of the mobile link 3' with a
Une rotation de la maille 3' dans le sens horaire, comme représenté sur la
Les gains procurés par l'élément élastique 10" sont les mêmes que ceux des éléments élastiques du premier mode de réalisation, à savoir notamment une force d'ouverture du dispositif de rallonge 200' qui est maximisée dans un encombrement donné, et tout en conservant des niveaux de contraintes satisfaisants au sein du matériau constitutif des lames du ressort.The gains provided by the
Naturellement, certains éléments des solutions décrites précédemment peuvent en variante se trouver sous une autre forme. Notamment, comme cela a été vu, un ou plusieurs éléments élastiques à ressorts multiples superposés peuvent être utilisés dans une même articulation élastique.Of course, certain elements of the solutions described above can alternatively be in another form. In particular, as has been seen, one or more elastic elements with superimposed multiple springs can be used in the same elastic joint.
Cette superposition de ressorts induit que les ressorts présentent une surface de contact, directe ou indirecte, qui leur permet d'agir l'un sur l'autre lors de l'actionnement de l'articulation élastique, de sorte que leurs effets mutuels se combinent pour optimiser les forces élastiques induites tout en minimisant les contraintes en leur sein. Ainsi, les deux ressorts sont avantageusement superposés dans une direction parallèle à la force élastique qu'ils exercent lors de l'actionnement de l'articulation élastique.This superposition of springs induces that the springs have a contact surface, direct or indirect, which allows them to act on each other during the actuation of the elastic joint, so that their mutual effects combine to optimize the elastic forces induced while minimizing the stresses within them. Thus, the two springs are advantageously superimposed in a direction parallel to the elastic force which they exert during the actuation of the elastic joint.
De plus, comme cela a été vu dans le cadre du dispositif de rallonge 200', l'élément élastique peut avantageusement être disposé autour d'un axe de rotation de deux composants d'un dispositif d'habillage horloger prenant part à l'articulation élastique. Bien entendu, comme cela a été décrit dans le cadre du fermoir 200, l'élément élastique pourrait être disposé de manière décalée et/ou dissociée de cet axe de rotation. Il pourrait être agencé autour de tout autre axe, ou indépendamment d'un axe.In addition, as has been seen in the context of the
Les au moins deux ressorts de l'élément élastique se présentent avantageusement sous la forme de deux lames. De plus, avantageusement, une première lame recouvre l'entier d'une deuxième lame. Alternativement, la superposition des lames peut n'être que partielle.The at least two springs of the elastic element are advantageously in the form of two leaves. In addition, advantageously, a first blade covers the whole of a second blade. Alternatively, the superposition of the slats may be only partial.
De plus, les au moins deux ressorts de l'élément élastique présentent avantageusement une épaisseur comprise entre 0.1 mm et 0.25 mm, voire entre 0.12 mm et 0.2 mm, voire entre 0.13 mm et 0.19 mm. Préférentiellement, ces au moins deux ressorts sont fabriqués en acier, en particulier en Nivaflex.In addition, the at least two springs of the elastic element advantageously have a thickness of between 0.1 mm and 0.25 mm, or even between 0.12 mm and 0.2 mm, or even between 0.13 mm and 0.19 mm. Preferably, these at least two springs are made of steel, in particular of Nivaflex.
L'invention a été illustrée à partir d'un fermoir de bracelet associé à une montre-bracelet, qui est d'ailleurs aussi concernée en tant que telle par cette invention, et plus précisément au niveau du mécanisme de verrouillage de ce fermoir, ou au niveau d'un dispositif de rallonge de bracelet. En variante, ce principe peut être implémenté pour toute liaison élastique articulée entre deux composants horlogers, que ce mouvement soit une pure rotation ou plus complexe, comme une rotation combinée à un autre déplacement. Ce principe peut, par ailleurs, être implémenté pour la mise en oeuvre d'une articulation élastique 100" au sein du mouvement. A titre d'exemple, une telle articulation élastique 100" peut être mise à profit pour la définition d'un dispositif de bascule de came de calendrier 200" tel qu'illustré en
Claims (15)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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EP19192106.3A EP3777599B1 (en) | 2019-08-16 | 2019-08-16 | Resilient joint for clockwork assembly |
US16/984,288 US11707118B2 (en) | 2019-08-16 | 2020-08-04 | Elastic articulation for a watch assembly |
JP2020132743A JP2021045533A (en) | 2019-08-16 | 2020-08-05 | Elastic articulation for watch assembly |
CN202010818705.XA CN112385947A (en) | 2019-08-16 | 2020-08-14 | Elastic movable joint for watch assembly |
Applications Claiming Priority (1)
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EP19192106.3A EP3777599B1 (en) | 2019-08-16 | 2019-08-16 | Resilient joint for clockwork assembly |
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EP3777599A1 true EP3777599A1 (en) | 2021-02-17 |
EP3777599B1 EP3777599B1 (en) | 2024-06-26 |
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EP19192106.3A Active EP3777599B1 (en) | 2019-08-16 | 2019-08-16 | Resilient joint for clockwork assembly |
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US (1) | US11707118B2 (en) |
EP (1) | EP3777599B1 (en) |
JP (1) | JP2021045533A (en) |
CN (1) | CN112385947A (en) |
Citations (5)
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FR1162735A (en) * | 1956-01-28 | 1958-09-16 | Rodi & Wienerberger Ag | Extendable chain with articulated elements, especially for watch straps |
FR2251290A1 (en) * | 1973-11-16 | 1975-06-13 | Claude Georges | |
EP1654950A1 (en) | 2004-11-03 | 2006-05-10 | Rolex S.A. | Bracelet fastener |
EP2606762A1 (en) | 2011-12-22 | 2013-06-26 | Montres Tudor S.A. | Clasp with different bracelet length settings |
EP2721943A1 (en) * | 2012-10-16 | 2014-04-23 | Rolex Sa | Resilient joint for clockwork assembly |
Family Cites Families (11)
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US2584404A (en) * | 1947-07-14 | 1952-02-05 | Iron Fireman Mfg Co | Furnace door structure with spring and cam retention means |
US3905403A (en) * | 1973-12-26 | 1975-09-16 | Kuhlman Corp | Methods of manufacturing dual interlocked safety spring assemblies |
US3880414A (en) * | 1973-12-26 | 1975-04-29 | Kuhlman Corp | Dual interlocked safety spring assembly and methods and machines for the manufacture thereof |
US4113298A (en) * | 1976-08-02 | 1978-09-12 | Merrill Brothers | Lifting clamp and spring therefor |
GB8820524D0 (en) * | 1988-08-31 | 1988-09-28 | Grovag Grossventiltech | Seals for gas isolators |
US5465997A (en) * | 1994-03-02 | 1995-11-14 | Mor/Ryde International, Inc. | Rubber spring tag axle supension |
DE20102998U1 (en) * | 2001-02-13 | 2001-06-07 | Liebherr-Hausgeräte GmbH, 88416 Ochsenhausen | Hinge joint |
DE20212022U1 (en) * | 2002-08-05 | 2002-09-26 | Arturo Salice S.P.A., Novedrate, Como | hinge |
CN201184384Y (en) * | 2008-04-03 | 2009-01-21 | 杭州安费诺飞凤通信部品有限公司 | Combined type drive spring in mobile communication terminal sliding lid hinge |
US10470532B2 (en) * | 2016-03-15 | 2019-11-12 | Rolex Sa | Adjusting device for bracelet |
EP3329797B1 (en) * | 2016-12-05 | 2020-07-01 | Rolex Sa | Device for adjusting the length of a bracelet |
-
2019
- 2019-08-16 EP EP19192106.3A patent/EP3777599B1/en active Active
-
2020
- 2020-08-04 US US16/984,288 patent/US11707118B2/en active Active
- 2020-08-05 JP JP2020132743A patent/JP2021045533A/en active Pending
- 2020-08-14 CN CN202010818705.XA patent/CN112385947A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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FR1162735A (en) * | 1956-01-28 | 1958-09-16 | Rodi & Wienerberger Ag | Extendable chain with articulated elements, especially for watch straps |
FR2251290A1 (en) * | 1973-11-16 | 1975-06-13 | Claude Georges | |
EP1654950A1 (en) | 2004-11-03 | 2006-05-10 | Rolex S.A. | Bracelet fastener |
EP2606762A1 (en) | 2011-12-22 | 2013-06-26 | Montres Tudor S.A. | Clasp with different bracelet length settings |
EP2721943A1 (en) * | 2012-10-16 | 2014-04-23 | Rolex Sa | Resilient joint for clockwork assembly |
Also Published As
Publication number | Publication date |
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US11707118B2 (en) | 2023-07-25 |
JP2021045533A (en) | 2021-03-25 |
CN112385947A (en) | 2021-02-23 |
US20210045503A1 (en) | 2021-02-18 |
EP3777599B1 (en) | 2024-06-26 |
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