EP2638437B1 - Magnetic and/or electrostatic shock absorber - Google Patents
Magnetic and/or electrostatic shock absorber Download PDFInfo
- Publication number
- EP2638437B1 EP2638437B1 EP11769865.4A EP11769865A EP2638437B1 EP 2638437 B1 EP2638437 B1 EP 2638437B1 EP 11769865 A EP11769865 A EP 11769865A EP 2638437 B1 EP2638437 B1 EP 2638437B1
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- European Patent Office
- Prior art keywords
- component
- pivot
- pole piece
- shock
- partially
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Images
Classifications
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- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B31/00—Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor
- G04B31/02—Shock-damping bearings
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- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B31/00—Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor
-
- 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
- G04B31/00—Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor
- G04B31/004—Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor characterised by the material used
Definitions
- the invention relates to a magnetic and / or electrostatic pivot comprising a watch component, said watch component being made of at least partially magnetically or at least partially magnetic permeable material, and / or of at least partially conductive material or at least partially electrified material, said component having a first end and a second end, and being made of at least partially magnetically or at least partially magnetically permeable material at said first end and at said second end, or respectively at least partially conductive or at least partially electrified at said first end; and at said second end, said pivot comprising, for the protection of said component, an anti-shock device which comprises a chamber in which said component is pivotally mounted between said first end and said second end ed.
- the invention also relates to a watch movement comprising at least one such magnetic pivot and / or electrostatic.
- the invention also relates to a timepiece comprising at least one such watch movement, and / or at least one such magnetic pivot and / or electrostatic.
- the invention relates to the field of micro-mechanics and in particular watchmaking, to which it is particularly well suited.
- the watchmaking technique uses traditional solutions to guarantee the anti-shock functions of watch components, such as a pendulum. These solutions are based on the elastic response of parts having shockproof function and on the mechanical friction between the shock and the component to be protected.
- Traditional shockproofing is characterized in particular by a threshold acceleration below which the shockproof is not deformed and by a function of radial refocusing of the component after the impact which is relatively imprecise.
- the maintenance of the mobile on the first polar mass does not correspond to a support, since there is solidarity between this mobile and the inner tubular magnet, via a flange and one of these two sockets .
- the mobile of this patent is not free with respect to the first polar mass constituted by the inner magnet, but only with respect to the second polar mass constituted by the external magnet.
- the invention proposes, to overcome the limitations of the prior art, a protection configuration of a component, and in particular a watch component, pivotally mounted between holding means with or without contact.
- the essential characteristic is the mobility of these holding means, whose normal operating position is a stable equilibrium position, these holding means are movable, with respect to a structure, under the effect of a strong acceleration created by shock, to preserve the integrity of the component and its environment.
- the invention relates to a magnetic and / or electrostatic pivot according to claim 1.
- this shockproof device comprises means for damping the movement of at least one or each of said polar masses, and / or elastic return means of at least one or each of said polar masses. , said damping means and / or said elastic return means being arranged to absorb the energy imparted to said polar masses during an impact, and to bring back after said shock at least one or each of said polar masses in a position of stable equilibrium that it occupied prior to the shock.
- the invention also relates to a watch movement comprising at least one such magnetic pivot and / or electrostatic.
- the invention also relates to a timepiece comprising at least one such watch movement, and / or at least one such magnetic pivot and / or electrostatic.
- the invention relates to a shockproof device 10 for protecting a watchmaking component 1 pivotally mounted between a first end 2 and a second end 3.
- This shockproof device 10 comprises, on either side of these first 2 and second 3 ends, on the one hand pivoting guide means or attraction means of the first end 2 held in abutment on a first polar mass 4 separate from the component 1, and secondly, in the vicinity of a second polar mass 6 separate from the component 1, means for pivotally guiding the second end 2 or means of attraction of this second end 2 towards the second polar mass 6.
- the component 1 is, at least in the vicinity of its first end 2 and its second end 3, preferably made of a magnetically permeable material and / or conductor. In a particular embodiment of the invention, this material is, again, magnetized and / or electrified.
- the first polar mass 4 and the second polar mass 6 are distinct from the component 1, and are each situated at the periphery or near the chamber 1A, and are each made of at least partially magnetic material or respectively at least partially magnetically permeable, or and in at least partially electrified or at least partially conductive material.
- the component 1 is freely mounted in the chamber 1A between the polar masses 4 and 6 and so as to bear on a bearing surface near one of these polar masses 4, 6.
- the pivoting guide means or the means of attraction of the first end 2 on the one hand, and the pivoting guide means or the means of attraction of the second end 3 on the other hand are movable along an axial direction D between stops.
- this shockproof device 10 comprises, on either side of the first 2 and second 3 ends, on the one hand means of attraction of the first end 2 for the maintenance of this first end. 2 resting on a first polar mass 4, and secondly, in the vicinity of a second polar mass 6, means for attracting this second end 3 towards the second polar mass 6, and the means for attracting the first end 2 on the one hand, and the attraction means of said second end 3 on the other hand, are movable along an axial direction D between stops.
- This axial direction D is illustrated in the figures in a particular case where it is linear. It can also be curvilinear.
- this shockproof device 10 preferably comprises means for damping the movement of at least one or each of the polar masses 4, 6 and / or elastic return means of at least one or each of the masses.
- damping means or / and these elastic return means are designed to absorb the energy communicated to the polar masses 4, 6 during an impact, and to bring back after this same shock at least one or each polar masses 4, 6 in a position of stable equilibrium that it occupied prior to this shock.
- the shockproof device 10 is arranged so that at least the first mass 4 or the second mass 6 comprises guide means 14, 16 arranged to cooperate, under a strong acceleration printed to the component 1 during an impact, in sliding along the axial direction D, with fixed complementary guide means 15, 17 that comprise structural elements 12, 13, of the device 10.
- the first mass 4 and the second mass 6 respectively comprise these means of guiding 14, 16.
- the anti-shock device 10 comprises such damping means, which are of the viscous friction type.
- the anti-shock device 10 comprises such damping means, which comprise a compressible fluid between the polar mass 4, 6 concerned and a stop 42, 44 which limits its stroke away from the component 1.
- the first polar mass 4 and the second polar mass 6 are each movable in a chamber between two stops, respectively 41 and 42, 43 and 44.
- the anti-shock device 10 comprises means for damping the movement of each of the polar masses 4, 6 in their respective chamber.
- the shockproof device 10 comprises such damping means, comprising a deformable memory damper 23, 24 arranged to dissipate the kinetic energy of a shock, and to slowly return to its original shape after an impact.
- this shape memory deformable damper 23, 24 is neoprene.
- the shockproof device 1 may comprise both damping means, and elastic return means, which are differentiated by their time constant, the return to the stable equilibrium position being slower with the damping means with the elastic return means.
- the axial direction D is linear.
- the component 1 is made of at least partially magnetically or at least partially magnetic permeable material at a first end 2 and at a second end 3.
- the anti-shock device 10 then comprises, on either side of the first 2 and second 3 ends, at an upper gap distance, the value of a determined functional clearance J, at the center distance between the first end 2 and the second end 3, a first surface 5 of a first polar mass 4 and a second surface 7 of a second polar mass 6.
- These polar masses 4, 6 are arranged to be either attracted each by a magnetic field emitted by one of the first end 2 or second end 3 of the component 1, or each to generate a magnetic field attracting a first end 2 or second end 3 of component 1, these magnetic fields being of different intensity at the first end 2 and the second end 3, so that the magnetic attraction forces acting on the component 1 at both ends 2, 3 are of different intensity, so as to attract the component 1 by one of its two ends 2, 3, in direct or indirect contact on only one of the surfaces 5, 7 of the polar masses 4, 6.
- the first polar mass 4 and the second polar mass 6 are each magnetic material, or magnetically permeable, and are magnetic if the component 1 is not.
- the first polar mass 4 and the second polar mass 6, preferably together define an axial direction D, on which is aligned a longitudinal axis of the component 1 joining the first end 2 and second end 3 of the latter, when the component 1 is inserted between the first polar mass 4 and the second polar mass 6
- the device is calculated so that the gap distance between the first surface 5 and the second surface 7 is dimensioned so as to ensure the determined functional clearance J over the entire operating temperature range of the shockproof device 10 and the component 1.
- FIG. figure 3 The principle of such a magnetic shockproof construction for a component 1, which is shown, in a preferred but nonlimiting application, in the form of a balance shaft, is shown in FIG. figure 3 .
- These polar masses 4 and 6 are magnetized if the component 1 is not, they can be magnetically permeable or magnetized when the component 1 is magnetized.
- These polar masses 4, 6 may in particular be constituted by micro-magnets, whose polarities are in agreement, and which define the pivoting of the axis of the component 1.
- the support of this axis is guaranteed, or by two stones interposed between the axis and the polar masses or magnets, or by a curing treatment of the surface of the polar masses or magnets.
- the two polar masses 4 and 6 are, according to the invention, each movable in a chamber limited by stops, respectively 41, 42 on the one hand, and 43, 44 on the other hand. Their movement is made according to an axial play, respectively h 1 and h 2 .
- the minimum distance between the polar masses 4 and 6 is fixed by the stops 41 and 43 closest to the component, while the maximum distance is fixed by the stops 42, 44, the farthest from the component 1, here constituted by the bottom feats.
- the two polar masses 4 and 6, and the component 1 are arranged in such a way that the magnetic forces and moments acting on the component are attractive forces, tending to attract the component 1 towards contact surfaces 5 and 7 that comprise either the polar masses 4 and 6, or spacers 18, 19, interposed between these polar masses and the component 1.
- the normal position of the polar masses is that represented on the figures 1 and 3 in a position where the magnetic fields are organized around the component 1 with an imbalance, so that it comes into contact with only one of the surfaces 5 or 7, ie the surface 5 in the figures, and remains at a distance J corresponding to a predetermined functional clearance of the other of these surfaces:
- the mobility of the polar masses 4 and 6 is preferably impeded by damping means, or else elastic return means.
- the damping means which are preferred, can take different forms: in the case of the figure 1 , viscous friction means of the polar masses 4 and 6 in chambers in which they are movable, this viscous friction being completed by the presence of a compressible fluid between the polar masses 4, 6, and their abutments 42, 44, the farthest from component 1.
- the damping means comprise dampers 23, 24, arranged to absorb a shock by allowing axial mobility, along the z direction of the figure 1 , or the axial pivoting direction D of the figure 3 , of one or the other polar mass 4 or 6, and to bring them slowly back to their position prior to impact. Therefore, elastic return means, such as springs, are also possible, however their stiffness must be calculated in order to avoid too stiff a return, and a reverse impact effect on the component 1, which is not desired .
- these dampers 23 and 24 are made of neoprene, or silicone, or comprise at least a portion of neoprene, or silicone, because of the slow return characteristics in the form of these shape memory materials.
- Such dampers placed on the internal walls of guide chambers of the polar masses 4 and 6 and inside the stops, are thus used to dissipate the kinetic energy of the shock and to prevent the polar masses or magnets from colliding with the walls or their rear stops 42, 44 during the impact, or with the stops 41, 43, the closest to the component 1, after the impact.
- the dampers may also be constructed so as to constitute themselves the extreme stops, as in the case of the figure 3 where they are fixed at the ends of complementary guide means 15 and 17, here bores, cooperating with guide means 14 and 16 that comprise, here in the form of cylindrical surfaces, the polar masses 4 and 6.
- dampers are however not necessary, if the axial play and the energy of the magnets are sufficiently large, and if the magnets are subjected to a viscous friction inside the encave which guarantees the dissipation of the 'energy.
- the size and energy of the magnets used, either in the polar masses 4 and 6, or in the component 1, or in the polar masses 4 and 6 and the component 1, as well as the profile of the axis of the component 1 are optimized to produce a net magnetic attraction force towards one of the two polar masses.
- magnets More particularly, the preferred case in which the polar masses 4 and 6 are magnetic, will also be called "magnets”.
- the integration is done on the volume of the axis V axis .
- the axis therefore bears on the same magnet.
- the figure 1 thus illustrates an embodiment of magnetic balance with axial symmetry: the balance shaft 1, made of soft magnetizable or magnetic material, is between two permanent magnets 4 and 6 whose magnetic polarization is directed in the same direction corresponding to the z direction of the figure 3 , here under the axial direction reference D corresponding to a pivot axis of the component 1.
- the support of the balance shaft can be guaranteed or by two stones 18, 19, interposed between the magnets and the balance shaft, or by a surface treatment of the magnets.
- the magnets have an axial play h 1 and h 2 respectively, determined by the stops 41, 42 and 43, 44.
- the axial clearance allows the dissipation of the energy of the shock through the movement of the magnets.
- the radial dampers 32 and 33 have the function of preventing the axis from emerging from the region of magnetic influence, and have no contact with the component 1 during normal operation thereof. This property is valid for all positions of the watch, so also in a vertical position.
- the axis is maintained in the region of influence of the magnetic field by the shockproofing 32 and 33: after the shock, the refocusing is guaranteed by the magnetic interaction that brings the axis exactly in the center of the magnets by aligning it perfectly in the z direction.
- the dissipative mechanisms act on the movement of the magnets and not on the axis, the dissipation due to the friction of the pivot of the balance is almost zero during normal operation.
- the quality factor of the regulator is thus independent of the shockproof function and can be much higher than for a traditional mechanical system.
- the axis of the component may itself be a permanent magnet, thus maximizing magnetic forces and torques.
- the determined functional game J is strictly positive.
- the functional clearance J determined is greater than or equal to 0.020 mm.
- the choice of the magnetic permeability of the material of the component 1, and the determination of the magnetization, as the case may be, of the first mass 4 and the second mass 6 on the one hand, and / or the component 1 on the other hand , are preferably made so that the magnetic fields attracting the first end 2 and second end 3 each exert on the component 1 attraction forces greater than ten times the force of attraction of gravity on the component 1.
- the magnetic field density in the vicinity of the first surface 5 and the second surface 7 is greater than or equal to 100,000 A / m.
- the shockproof device 10 also advantageously comprises shielding means 20 arranged to prohibit the action of any magnetic field having a radial component with respect to the axial direction D, in the vicinity of the first 5 and second 7 contact surfaces.
- these shielding means 20 comprise at least one tubular part 21, 22 oriented on the axial direction D and surrounding the first mass 4 and the second mass 6, and at least the second end 3 of the component 1.
- At least the first surface 5 comprises a hard coating or is constituted by a hard surface of a spacer 18 interposed between the first mass 4 and the component 1.
- a spacer 19 can be interposed between the second mass 6 and component 1.
- the anti-shock device 10 comprises magnetic field looping means between the first mass 4 and the second mass 6.
- the attraction between the polar masses 4, 6, and the component 1 is of electrostatic nature.
- the notion of relative permittivity or dielectric constant is then substituted for the notion of magnetic permeability, and the notion of electrostatic field is substituted for that of magnetic field.
- the construction of the anti-shock device 10 is entirely similar, and is sized according to the permanent electrostatic fields established between the component 1 and the polar masses 4 and 6.
- the anti-shock device 10 relates to the protection of a watch component 1 made of at least partially conductive material or at least partially electrified material at a first end 2 and a second end 3.
- this shockproof device 10 comprises , on either side of said first 2 and second 3 ends, at an upper gap distance, the value of a determined functional clearance J, at the distance between the first end 2 and the second end 3, a first surface 5 of a first polar mass 4 and a second surface 7 of a second polar mass 6, which polar masses 4; 6 are arranged to either be each attracted by an electrostatic field emitted by one of the first end 2 or second end 3 of the component 1, or to each generate an electrostatic field attracting one of the first end 2 or second end 3 of the component 1 these electrostatic fields being of different intensity at the first end 2 and the second end 3, so that the electrostatic attraction forces acting on the component 1 at its two ends 2, 3 are different intensity, so as to attract the component 1 by one of its two ends, in direct or indirect contact on only
- FIGS. 4 and 5 illustrate an advantageous embodiment, comprising a damping assembly, because of its high compactness, and its overall low thickness.
- the bearing surface 18A is a polished concave spherical sector made in a stone 18. It is plated on a permanent magnet 4, which develops a remanent magnetic field greater than 1 Tesla. In contrast to the stone 18 with respect to the magnet 4 is disposed a support stone 43 having a polished convex profile.
- the stone 18, the magnet 4 and the support stone 43 are inserted together in a kitten 40, made for example cupro-beryllium.
- the stone 19 and the support stone 46 are mounted in the kitten 40 with a clamping or gluing, or a means of mastery, guaranteeing a holding greater than 1 N.
- This kitten 40 slides freely in a block 41, which has an opening 34 for the passage of the first end 2 of the component 1, here constituted by a sprung-balance assembly.
- This block 41 comprises, in the vicinity of this opening 34, a radial shock absorber or a radial damper 32, constituted in particular by a range of revolution about the axis D.
- the assembly is assembled so that the first end 2 of the component 1 is mobile in support in the convex bowl 18A, and that the support stone 43 has its convex sector at the other end.
- This outer block 41 acts as a stop during shocks on the component 1.
- the first end 2 of the component or the rocker 1 has a curvature, which is less than that of the concave cap of the stone 18, to ensure contact on a single bridge.
- the concave curvature 18A of the stone 18 makes it possible to reduce the gap distance between the polar mass 6 and the first end 2 of the component 1, and also constitutes a reservoir for the oil.
- the bearing surface 19A is a polished concave spherical sector made of a stone 19. It is plated on a permanent magnet 6, which develops a remanent magnetic field greater than 1 Tesla.
- a bearing stone 46 having a polished convex profile. The stone 19, the magnet 6 and the support stone 46, are inserted together in a kitten 44, made for example cupro-beryllium. This kitten 44 slides freely in a block 45, which has an opening 35 for the passage of the second end 3 of the component 1.
- This block 45 comprises, in the vicinity of this opening 35, a radial shock absorber or a radial damper 33, consisting in particular by a range of revolution about the axis D.
- the assembly is assembled so that the second end 3 of the component 1 is mobile in support in the convex bowl 19A, and that the bearing stone 46 presents its convex sector at the other end.
- the figure 4 illustrates this end assembly on the side of the second end 3, which is damped by a damper constituted by an elastic arm 50 fall arrest.
- This elastic arm 50 is fixed on a plate 30 or on a bridge 31, it comprises a free end, which bears on the convex cap of the supporting stone 46, by at least one contact surface, and, in this preferred example by three contact areas 51, 52, 53 arranged in a triangle.
- the force is perfectly distributed, and the axial retention of the carrier assembly of the second polar mass 6 is ensured.
- Such an elastic arm fall arrestor is preferably mounted with a prestressing of the order of 0.5 N.
- the magnets 4 and 6 are preferably Nd-Fe-B permanent magnets, for example of the "Vacodym®” type of "Vacuumschmelze GmbH".
- the invention also relates to a magnetic pivot 100 and / or electrostatic comprising a watch component 1, made of material at least partially magnetically permeable or at least partially magnetic, at a first end 2 and a second end 3, respectively at least partially driver or at least partially electrified at a first end 2 and at a second end 3, and comprising such an anti-shock device 10.
- this magnetic pivot 100 and / or electrostatic comprises access means for the insertion of the component 1 in the air gap, or is made dismountable in several parts comprising means of cooperation between them or / and with a bridge 31 and / or a plate 30 to allow mounting of the component 1 supported by its first end 2 on a first portion having the first surface 5 and the first mass 4, prior to mounting a second portion having the second surface 7 and the second mass 6.
- a magnetic pivot 100 and / or electrostatic as shown in the figure 1 comprises a component 1 which has a tapered portion, of revolution about the axial direction D which is linear, and of degressive section from the center of gravity of the component 1 to the second end 3, so as to improve the magnetic field gradient at near the second surface 7, and to facilitate the centering of the second end 3 on the axial direction D.
- the magnetic pivot 100 and / or electrostatic advantageously comprises a component 1 which is dynamically balanced, for its maximum rotational speed, around a longitudinal axis joining the first end 2 and the second end 3.
- the first end 2 of the component 1 is arranged with a point contact surface with the first surface 5, the point contact surface being locally spherical or conical.
- the first surface 5 comprises a receiving surface arranged to cooperate with the first end 2, the receiving surface being hollow and locally spherical or conical.
- the component 1 is a rocker whose pivot axis coincides with the axial direction D.
- the invention also relates to a watch movement 1000 comprising at least one such anti-shock device 10, and / or at least one such pivot 100 magnetic and / or electrostatic.
- the invention also relates to a timepiece comprising at least one such watch movement 1000, and / or at least one such shockproof device 10, and / or at least one such pivot 100 magnetic and / or electrostatic.
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Description
L'invention concerne un pivot magnétique ou/et électrostatique comportant un composant horloger, ledit composant horloger étant en matériau au moins partiellement perméable magnétiquement ou respectivement au moins partiellement magnétique, ou/et en matériau au moins partiellement conducteur ou respectivement au moins partiellement électrisé, ledit composant comportant une première extrémité et une deuxième extrémité, et étant en matériau au moins partiellement perméable magnétiquement ou au moins partiellement magnétique à ladite première extrémité et à ladite deuxième extrémité, ou respectivement au moins partiellement conducteur ou au moins partiellement électrisé à ladite première extrémité et à ladite deuxième extrémité, ledit pivot comportant, pour la protection dudit composant, un dispositif antichoc lequel comporte une chambre dans laquelle ledit composant est monté en pivot entre ladite première extrémité et ladite deuxième extrémité.The invention relates to a magnetic and / or electrostatic pivot comprising a watch component, said watch component being made of at least partially magnetically or at least partially magnetic permeable material, and / or of at least partially conductive material or at least partially electrified material, said component having a first end and a second end, and being made of at least partially magnetically or at least partially magnetically permeable material at said first end and at said second end, or respectively at least partially conductive or at least partially electrified at said first end; and at said second end, said pivot comprising, for the protection of said component, an anti-shock device which comprises a chamber in which said component is pivotally mounted between said first end and said second end ed.
L'invention concerne encore un mouvement d'horlogerie comportant au moins un tel pivot magnétique ou/et électrostatique.The invention also relates to a watch movement comprising at least one such magnetic pivot and / or electrostatic.
L'invention concerne encore une pièce d'horlogerie comportant au moins un tel mouvement d'horlogerie, ou/et au moins un tel pivot magnétique ou/et électrostatique.The invention also relates to a timepiece comprising at least one such watch movement, and / or at least one such magnetic pivot and / or electrostatic.
L'invention concerne le domaine de la micro-mécanique et en particulier de l'horlogerie, auquel elle est particulièrement bien adaptée.The invention relates to the field of micro-mechanics and in particular watchmaking, to which it is particularly well suited.
La technique horlogère utilise des solutions traditionnelles pour garantir les fonctions d'antichoc des composants horlogers, tels qu'un balancier. Ces solutions se basent sur la réponse élastique de pièces ayant fonction d'antichoc et sur le frottement mécanique entre les antichocs et le composant à protéger. Les antichocs traditionnels sont caractérisés notamment par une accélération de seuil au dessous de laquelle l'antichoc n'est pas déformé et par une fonction de recentrage radiale du composant après le choc qui est relativement imprécise.The watchmaking technique uses traditional solutions to guarantee the anti-shock functions of watch components, such as a pendulum. These solutions are based on the elastic response of parts having shockproof function and on the mechanical friction between the shock and the component to be protected. Traditional shockproofing is characterized in particular by a threshold acceleration below which the shockproof is not deformed and by a function of radial refocusing of the component after the impact which is relatively imprecise.
Les problèmes à résoudre sont alors les suivants :
- garantir, après le choc, un recentrage radial exact.
- réaliser une solution antichoc indépendante des frottements mécaniques, qui ont le désavantage de réduire le rendement/facteur de qualité des composants, lors d'un fonctionnement normal, c'est-à-dire en absence de chocs.
- guarantee, after the shock, an exact radial refocusing.
- achieve a shockproof solution independent of mechanical friction, which have the disadvantage of reducing the efficiency / quality factor of the components, during normal operation, that is to say in the absence of shocks.
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L'invention propose, pour pallier les limites de l'art antérieur, une configuration de protection d'un composant, et notamment d'un composant horloger, monté en pivot entre des moyens de maintien avec ou sans contact.The invention proposes, to overcome the limitations of the prior art, a protection configuration of a component, and in particular a watch component, pivotally mounted between holding means with or without contact.
La caractéristique essentielle est la mobilité de ces moyens de maintien, dont la position de fonctionnement normale est une position d'équilibre stable, ces moyens de maintien sont mobiles, par rapport à une structure, sous l'effet d'une forte accélération créée par un choc, afin de préserver l'intégrité du composant et de son environnement.The essential characteristic is the mobility of these holding means, whose normal operating position is a stable equilibrium position, these holding means are movable, with respect to a structure, under the effect of a strong acceleration created by shock, to preserve the integrity of the component and its environment.
A cet effet, l'invention concerne un pivot magnétique ou/et électrostatique selon la revendication 1.For this purpose, the invention relates to a magnetic and / or electrostatic pivot according to
Selon une caractéristique de l'invention, ce dispositif antichoc comporte des moyens d'amortissement du mouvement d'au moins une ou de chacune desdites masses polaires, ou/et des moyens de rappel élastique d'au moins une ou de chacune desdites masses polaires, lesdits moyens d'amortissement ou/et lesdits moyens de rappel élastique étant agencés pour absorber l'énergie communiquée aux dites masses polaires lors d'un choc, et pour ramener après ce dit choc d'au moins une ou chacune desdites masses polaires dans une position d'équilibre stable qu'elle occupait préalablement audit choc.According to a characteristic of the invention, this shockproof device comprises means for damping the movement of at least one or each of said polar masses, and / or elastic return means of at least one or each of said polar masses. , said damping means and / or said elastic return means being arranged to absorb the energy imparted to said polar masses during an impact, and to bring back after said shock at least one or each of said polar masses in a position of stable equilibrium that it occupied prior to the shock.
L'invention concerne encore un mouvement d'horlogerie comportant au moins au moins un tel pivot magnétique ou/et électrostatique.The invention also relates to a watch movement comprising at least one such magnetic pivot and / or electrostatic.
L'invention concerne encore une pièce d'horlogerie comportant au moins un tel mouvement d'horlogerie, ou/et au moins un tel pivot magnétique ou/et électrostatique.The invention also relates to a timepiece comprising at least one such watch movement, and / or at least one such magnetic pivot and / or electrostatic.
D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description qui va suivre, en référence aux dessins annexés, où :
- la
figure 1 représente, de façon schématisée, et en coupe longitudinale selon un axe de pivotement, un premier mode d'un dispositif selon l'invention, appliqué à la protection d'un composant de pièce d'horlogerie ; - la
figure 2 représente, de façon schématisée, et en perspective, une pièce d'horlogerie comportant un mouvement incorporant un dispositif selon l'invention ; - la
figure 3 représente, de façon schématisée, le principe de fonctionnement d'un dispositif selon un autre mode de l'invention ; - la
figure 4 représente, de façon schématisée, et en coupe longitudinale selon un axe de pivotement, une variante de réalisation selon le premier mode d'un dispositif selon l'invention, munie d'un dispositif amortisseur ; - la
figure 5 représente, de façon schématisée, partielle et en perspective, un élément de l'amortisseur de lafigure 4 .
- the
figure 1 represents, schematically, and in longitudinal section along a pivot axis, a first mode of a device according to the invention, applied to the protection of a timepiece component; - the
figure 2 represents, schematically, and in perspective, a timepiece comprising a movement incorporating a device according to the invention; - the
figure 3 schematically represents the operating principle of a device according to another embodiment of the invention; - the
figure 4 represents, schematically, and in longitudinal section along a pivot axis, an alternative embodiment according to the first embodiment of a device according to the invention, provided with a damping device; - the
figure 5 represents, schematically, partially and in perspective, an element of the shock absorber of thefigure 4 .
Ainsi, l'invention concerne un dispositif antichoc 10 pour la protection d'un composant horloger 1 monté en pivot entre une première extrémité 2 et une deuxième extrémité 3.Thus, the invention relates to a
Ce dispositif antichoc 10 comporte, de part et d'autre de ces première 2 et deuxième 3 extrémités, d'une part des moyens de guidage en pivotement ou des moyens d'attraction de la première extrémité 2 maintenue en appui sur une première masse polaire 4 distincte du composant 1, et d'autre part, au voisinage d'une deuxième masse polaire 6 distincte du composant 1, des moyens de guidage en pivotement de la deuxième extrémité 2 ou des moyens d'attraction de cette deuxième extrémité 2 vers la deuxième masse polaire 6.This
Le composant 1 est, au moins au voisinage de sa première extrémité 2 et de sa deuxième extrémité 3, de préférence réalisé dans un matériau magnétiquement perméable ou/et conducteur. Dans une réalisation particulière de l'invention, ce matériau est, encore, aimanté ou/et électrisé.The
Le composant 1 est mobile dans une chambre 1A. On entend ici par masse polaire une masse, qui, au moins au voisinage de la chambre 1A, est réalisée dans un matériau magnétiquement perméable ou/et conducteur, ou, dans une réalisation particulière et préférée de l'invention, dans un matériau aimanté ou/et électrisé. Cette masse polaire 4 ou 6 ne fait pas partie du composant 1, et est, ainsi, située en périphérie ou à proximité de la chambre 1A :
- dans un premier mode de réalisation, par exemple tel que visible sur les
figures 1 et4 , la masse polaire est séparée de lachambre 1A par une entretoise laquelle comporte une surface d'appui ou de butée pour lecomposant 1. Sur lafigure 1 , une première masse polaire 4 est ainsi séparée ducomposant 1 par uneentretoise 18, laquelle comporte une telle première surface d'appui 5, et une deuxième masse polaire 6 est séparée ducomposant 1 par uneentretoise 19 qui comporte une telle deuxième surface debutée 7. Dans une telle variante, les masses polaires, quoique sans contact direct avec lecomposant 1, interagissent avec lui dans, selon le cas, une attraction ou une répulsion magnétique ou/et électrostatique: ou bien une extrémité axiale selon la direction axiale D ducomposant 1 est aimantée ou électrisée, et coopère avec la masse polaire la plus proche, qui est magnétiquement perméable ou conductrice sous l'action d'une force magnétique ou électrostatique, ou bien c'est l'inverse, une extrémité axiale selon la direction axiale D ducomposant 1 est magnétiquement perméable ou conductrice, et coopère avec la masse polaire la plus proche, qui est aimantée ou électrisée ; - dans un autre mode de réalisation, tel que visible sur la
figure 3 , une telle masse polaire peut comporter une surface constituant une des surfaces latérales de lachambre 1A, au voisinage de laquelle ou bien en contact avec laquelle est susceptible de venir la première 2 ou la deuxième 3 extrémité ducomposant 1. De préférence, quand lecomposant 1 est un mobile pivotant autour d'un axe de pivotement D, cette surface de la masse polaire est située dans le prolongement de cet axe D. L'interaction magnétique ou/et électrostatique se fait comme dans le cas précédent, mais sans les entretoises : lecomposant 1 est alors en contact direct avec une des masses polaires ; - d'autres modes concernent des réalisations différentes à chaque extrémité du composant 1 : contact direct d'un côté, force d'attraction ou de répulsion indirecte de l'autre.
- in a first embodiment, for example as visible on the
figures 1 and4 , the polar mass is separated from thechamber 1A by a spacer which comprises a bearing surface or abutment for thecomponent 1. On thefigure 1 afirst pole mass 4 is thus separated from thecomponent 1 by aspacer 18, which comprises such a first bearingsurface 5, and a secondpolar mass 6 is separated from thecomponent 1 by aspacer 19 which comprises such a second surface ofstop 7. In such an embodiment, the polar masses, although without direct contact with thecomponent 1, interact with it in, as the case may be, magnetic or / and electrostatic attraction or repulsion: or an axial end in the axial direction D of thecomponent 1 is magnetized or electrified, and cooperates with the nearest polar mass, which is magnetically permeable or conductive under the action of a magnetic or electrostatic force, or it is the opposite, an axial end according to the axial direction D of thecomponent 1 is magnetically permeable or conductive, and cooperates with the nearest polar mass, which is magnetized or electrified; - in another embodiment, as visible on the
figure 3 such a polar mass may comprise a surface constituting one of the side surfaces of thechamber 1A, in the vicinity of which or in contact with which is likely to come the first 2 or the second end of thecomponent 1. Preferably, when thecomponent 1 is a mobile pivoting about a pivot axis D, this surface of the polar mass is located in the extension of this axis D. The magnetic interaction and / or electrostatic is as in the previous case, but without the spacers: thecomponent 1 is then in direct contact with one of the polar masses; - other modes relate to different embodiments at each end of the component 1: direct contact on one side, indirect attraction or repulsion force on the other.
La première masse polaire 4 et la deuxième masse polaire 6 sont distinctes du composant 1, et sont chacune située en périphérie ou à proximité de la chambre 1A, et sont chacune en matériau au moins partiellement magnétique ou respectivement au moins partiellement perméable magnétiquement, ou/et en matériau au moins partiellement électrisé ou respectivement au moins partiellement conducteur. Le composant 1 est monté libre dans la chambre 1A entre les masses polaires 4 et 6 et de façon à prendre appui sur une surface d'appui à proximité de l'une seule de ces masses polaires 4, 6.The first
Selon une caractéristique particulière de l'invention, les moyens de guidage en pivotement ou les moyens d'attraction de la première extrémité 2 d'une part, et les moyens de guidage en pivotement ou les moyens d'attraction de la deuxième extrémité 3 d'autre part, sont mobiles le long d'une direction axiale D entre des butées.According to a particular characteristic of the invention, the pivoting guide means or the means of attraction of the
Dans la forme préférée de l'invention, ce dispositif antichoc 10 comporte, de part et d'autre des première 2 et deuxième 3 extrémités, d'une part des moyens d'attraction de la première extrémité 2 pour le maintien de cette première extrémité 2 en appui sur une première masse polaire 4, et d'autre part, au voisinage d'une deuxième masse polaire 6, des moyens d'attraction de cette deuxième extrémité 3 vers la deuxième masse polaire 6, et les moyens d'attraction de la première extrémité 2 d'une part, et les moyens d'attraction de ladite deuxième extrémité 3 d'autre part, sont mobiles le long d'une direction axiale D entre des butées.In the preferred form of the invention, this
Cette direction axiale D est illustrée sur les figures dans un cas particulier où elle est linéaire. Elle peut également être curviligne.This axial direction D is illustrated in the figures in a particular case where it is linear. It can also be curvilinear.
De façon avantageuse, ce dispositif antichoc 10 comporte de préférence des moyens d'amortissement du mouvement d'au moins une ou de chacune des masses polaires 4, 6 ou/et des moyens de rappel élastique d'au moins une ou de chacune des masses polaires 4, 6. Ces moyens d'amortissement ou/et ces moyens de rappel élastique sont agencés pour absorber l'énergie communiquée aux masses polaires 4, 6 lors d'un choc, et pour ramener après ce même choc au moins une ou chacune des masses polaires 4, 6 dans une position d'équilibre stable qu'elle occupait préalablement à ce choc.Advantageously, this
Dans un mode de réalisation particulier, tel que visible sur la
Dans un mode de réalisation particulier, le dispositif antichoc 10 comporte de tels moyens d'amortissement, qui sont de type frottement visqueux.In a particular embodiment, the
Dans un mode de réalisation particulier, le dispositif antichoc 10 comporte de tels moyens d'amortissement, qui comportent un fluide compressible entre la masse polaire 4, 6 concernée et une butée 42, 44 qui limite sa course à l'opposé du composant 1.In a particular embodiment, the
De façon particulière propre à l'invention, tel que visible sur la
De façon préférée et avantageuse, le dispositif antichoc 10 comporte des moyens d'amortissement du mouvement de chacune des masses polaires 4, 6 dans leur chambre respective.In a preferred and advantageous manner, the
Dans un mode de réalisation particulier, tel que visible sur la
De façon préférée, cet amortisseur déformable à mémoire de forme 23, 24 est en néoprène.Preferably, this shape
Dans une réalisation particulière, le dispositif antichoc 1 peut comporter à la fois des moyens d'amortissement, et des moyens de rappel élastique, qui se différencient par leur constante de temps, le retour à la position d'équilibre stable étant plus lent avec les moyens d'amortissement qu'avec les moyens de rappel élastique.In a particular embodiment, the
Dans un mode de réalisation préféré et tel que visible sur les figures, la direction axiale D est linéaire.In a preferred embodiment and as shown in the figures, the axial direction D is linear.
Dans une application préférée, le composant 1 est en matériau au moins partiellement perméable magnétiquement ou au moins partiellement magnétique à une première extrémité 2 et à une deuxième extrémité 3.In a preferred application, the
Selon l'invention, le dispositif antichoc 10 comporte alors, de part et d'autre des première 2 et deuxième 3 extrémités, à une distance d'entrefer supérieure, de la valeur d'un jeu fonctionnel déterminé J, à l'entraxe entre la première extrémité 2 et la deuxième extrémité 3, une première surface 5 d'une première masse polaire 4 et une deuxième surface 7 d'une deuxième masse polaire 6.According to the invention, the
Ces masses polaires 4, 6 sont agencées pour, ou bien être attirée chacune par un champ magnétique émis par une des première extrémité 2 ou deuxième extrémité 3 du composant 1, ou bien pour générer chacune un champ magnétique attirant une des première extrémité 2 ou deuxième extrémité 3 du composant 1, ces champs magnétiques étant d'intensité différente au niveau de la première extrémité 2 et de la deuxième extrémité 3, de façon à ce que les forces d'attraction magnétiques s'exerçant sur le composant 1 à ses deux extrémités 2 , 3 soient d'intensité différente, de façon à attirer le composant 1 par une de ses deux extrémités 2, 3, en contact direct ou indirect sur une seule des surfaces 5 , 7 des masses polaires 4 , 6.These
De préférence, la première masse polaire 4 et la deuxième masse polaire 6 sont chacune en matériau magnétique, ou perméable magnétiquement, et sont magnétiques si le composant 1 ne l'est pas. La première masse polaire 4 et la deuxième masse polaire 6, de préférence définissent ensemble une direction axiale D, sur laquelle est aligné un axe longitudinal du composant 1 joignant les première extrémité 2 et deuxième extrémité 3 de ce dernier, lorsque le composant 1 est inséré entre les première masse polaire 4 et deuxième masse polaire 6Preferably, the first
Le dispositif est calculé de façon à ce que la distance d'entrefer entre la première surface 5 et la deuxième surface 7 soit dimensionnée de façon à assurer le jeu fonctionnel déterminé J sur toute la plage de températures d'utilisation du dispositif antichoc 10 et du composant 1.The device is calculated so that the gap distance between the
Le principe d'une telle construction d'antichoc magnétique pour un composant 1, qui est représenté, dans une application préférée mais non limitative, sous la forme d'un axe de balancier, est montré en
Ces masses polaires 4, 6, peuvent notamment être constituées de micro-aimants, dont les polarités concordent, et qui définissent le pivotement de l'axe du composant 1. L'appui de cet axe est garanti, ou bien par deux pierres interposées entre l'axe et les masses polaires ou aimants, ou bien par un traitement de durcissement de la surface des masses polaires ou aimants.These
Les deux masses polaires 4 et 6 sont, selon l'invention, mobiles chacune dans une chambre limitée par des butées, respectivement 41, 42 d'une part, et 43, 44 d'autre part. Leur mouvement se fait selon un jeu axial, respectivement h1 et h2.The two
La distance minimale entre les masses polaires 4 et 6 est fixée par les butées 41 et 43 les plus proches du composant, tandis que la distance maximale est fixée par les butées 42, 44, les plus éloignées du composant 1, ici constituées par le fond des encaves.The minimum distance between the
Les deux masses polaires 4 et 6, et le composant 1, sont agencés de façon à ce que les forces et couples magnétiques s'exerçant sur le composant soient des forces d'attraction, tendant à attirer le composant 1 vers des surfaces de contact 5 et 7 que comportent, soit les masses polaires 4 et 6, soit des entretoises 18, 19, interposées entre ces masses polaires et le composant 1.The two
La position normale des masses polaires est celle représentée sur les
La mobilité des masses polaires 4 et 6 est de préférence entravée par des moyens d'amortissement, ou encore des moyens de rappel élastique. Les moyens d'amortissement, préférés, peuvent prendre différentes formes: dans le cas de la
Ou bien, tel que visible sur la
Dans une réalisation préférée pour l'horlogerie, notamment pour amortir un axe de balancier tel que visible sur la
De tels amortisseurs, placés sur les parois internes de chambres de guidage des masses polaires 4 et 6 et à l'intérieur des butées, sont ainsi utilisés pour dissiper l'énergie cinétique du choc et éviter que les masses polaires ou aimants entrent en collision avec les parois ou leurs butées arrière 42, 44 lors du choc, ou avec les butées 41, 43, les plus proches du composant 1, après le choc.Such dampers, placed on the internal walls of guide chambers of the
Les amortisseurs peuvent aussi être construits de façon à constituer eux-mêmes les butées extrêmes, comme dans le cas de la
L'utilisation des amortisseurs n'est toutefois pas nécessaire, si le jeu axial et l'énergie des aimants sont suffisamment grands, et si les aimants sont soumis à un frottement visqueux à l'intérieur de l'encave qui garantit la dissipation de l'énergie.The use of the dampers is however not necessary, if the axial play and the energy of the magnets are sufficiently large, and if the magnets are subjected to a viscous friction inside the encave which guarantees the dissipation of the 'energy.
Des antichoc radiaux traditionnels 32 et 33, visibles sur la
La taille et l'énergie des aimants utilisés, soit dans les masses polaires 4 et 6, soit dans le composant 1, soit dans les masses polaires 4 et 6 et le composant 1, ainsi que le profil de l'axe du composant 1 sont optimisés pour produire une force d'attraction magnétique nette vers une des deux masses polaires.The size and energy of the magnets used, either in the
On décrit ici plus particulièrement le cas préféré où les masses polaires 4 et 6 sont magnétiques, elles seront aussi appelées « aimants ».More particularly, the preferred case in which the
La valeur de la force magnétique est proportionnelle à l'aimantation Maxe(r,z) et au gradient du champ magnétique H produit par les deux aimants :
L'intégration est faite sur le volume de l'axe Vaxe. Pour toutes positions de la pièce d'horlogerie, ci-après appelée « montre », l'axe appuie donc sur le même aimant. L'axe est aussi soumis au couple magnétique Cm :
Il est nul seulement si l'axe est orienté comme les lignes de champ, donc dans la direction z. Si l'orientation de l'axe s'écarte de la direction z, le couple de rappel Cm réoriente l'axe dans la direction correcte.It is zero only if the axis is oriented like the field lines, so in the z direction. If the orientation of the axis deviates from the direction z, the restoring torque C m redirects the axis in the correct direction.
La
L'interaction magnétique entre axe et aimants résulte dans une attraction nette vers l'aimant 4 supérieure à la gravité.The magnetic interaction between axis and magnets results in a net attraction to the
Les aimants ont un jeu axial h1 et h2 respectivement, déterminé par les butées 41, 42 et 43, 44. Le jeu axial permet la dissipation de l'énergie du choc à travers le mouvement des aimants. Les amortisseurs radiaux 32 et 33 ont la fonction d'éviter que l'axe sorte de la région d'influence magnétique, et n'ont pas de contact avec le composant 1 pendant la marche normale de celui-ci. Cette propriété est valable pour toutes les positions de la montre, donc aussi en position verticale.The magnets have an axial play h 1 and h 2 respectively, determined by the
L'optimisation des caractéristiques géométriques des pièces permet deux résultats:
- la force d'attraction nette entre l'axe 1
et l'aimant 4 est supérieure à la force de gravité et à la force maximale appliquée, par le dispositif mécanique avec lequel il coopère, sur le composant 1, tel que visible sur lafigure 3 ; - la force d'attraction magnétique entre les deux aimants 4
et 6 est suffisamment grande pour emmener toujours les aimants dans la position de distance minimale après le choc, c'est-à-dire les deux aimants en contact avec les butées.
- the net force of attraction between the
axis 1 and themagnet 4 is greater than the force of gravity and the maximum force applied, by the mechanical device with which it cooperates, on thecomponent 1, as visible on thefigure 3 ; - the magnetic attraction force between the two
4 and 6 is sufficiently large to always bring the magnets into the position of minimum distance after the impact, that is to say the two magnets in contact with the stops.magnets
Ces deux propriétés garantissent que la configuration montrée est d'équilibre stable en absence de chocs et que cette position d'équilibre stable est réobtenue après un choc.These two properties ensure that the shown configuration is stable equilibrium in the absence of shocks and that stable equilibrium position is re-reached after an impact.
Lors d'un choc radial, l'axe est maintenu dans la région d'influence du champ magnétique par les antichocs 32 et 33: après le choc, le recentrage est garanti par l'interaction magnétique qui ramène l'axe exactement au centre des aimants en l'alignant parfaitement dans la direction z.During a radial shock, the axis is maintained in the region of influence of the magnetic field by the
Lors d'un choc axial deux situations sont possibles :
- le système subit une accélération a = n g dans la direction z > 0 : dans ce cas,
l'aimant 4 et l'axe, qui sont soumis à la même accélération, se déplacent solidairement, en gardant le contact grâce à l'attraction magnétique, tandis que l'aimant 6 est bloquépar sa butée 43. L'énergie cinétique du choc est dissipée par le frottement de l'aimant contre les parois latérales de l'encave et/ou l'amortisseur placé sur la butée 44. Après le choc, l'attraction magnétique emmène l'aimant 4et l'axe 1 dans leur position d'équilibre. Le frottement et/ou l'amortisseur à l'intérieur de la butée ont la fonction d'empêcher une collision trop énergétique de l'aimant 4 contre la butée, collision qui pourrait impliquer la perte de contact de l'axe de l'aimant 4 et un choc énergétique de l'axe contre l'aimant 4. Une fois que les aimants sont retournés en contact contre les butées, l'axe est ramené exactement à sa position d'équilibre ; - ou le système subit une accélération a = n g dans la direction z < 0 : dans ce cas,
l'aimant 6et l'axe 1 se déplacent, tandis que l'aimant 4 est bloquépar sa butée 41.L'axe 1 perd le contact avec la masse polaire 4 mais il entre rapidement en contact avec la masse polaire 6. Le choc entre l'axe et l'aimant 4 est toutefois très peu énergétique même pour une grande accélération du type a = 3500 g, parce que la distance initiale est très petite, environ 0.02 mm. En analogie avec le cas précédent, l'énergie du choc est dissipée par le mouvement de l'aimant 6, grâce au frottement et/ou à l'amortisseur 24 ou dans la chambre de mobilité de la masse polaire 6. Après le choc,l'aimant 6, toujours en contact avec l'axe, est ramené contre la butée. Dans cette condition, l'axe est soumis à une force d'attraction nette vers l'aimant 4, et donc il est ramené en contact avec celui-ci.
- the system undergoes an acceleration a = ng in the direction z> 0: in this case, the
magnet 4 and the axis, which are subjected to the same acceleration, move in solidarity, keeping the contact thanks to the magnetic attraction while themagnet 6 is blocked by itsstop 43. The kinetic energy of the shock is dissipated by the friction of the magnet against the side walls of the encave and / or the damper placed on thestop 44. the shock, the magnetic attraction takes themagnet 4 and theaxis 1 in their equilibrium position. The friction and / or the damper inside the abutment have the function of preventing an excessive energy collision of themagnet 4 against the abutment, a collision which could involve the loss of contact with the axis of themagnet 4 and an energy shock of the axis against themagnet 4. Once the magnets are returned in contact against the stops, the axis is brought back exactly to its equilibrium position; - or the system undergoes acceleration a = ng in the direction z <0: in this case, the
magnet 6 and theaxis 1 move, while themagnet 4 is blocked by itsstop 41. Theaxis 1 loses contact with thepolar mass 4 but it quickly comes into contact with thepolar mass 6. The shock between the axis and themagnet 4 is however very little energy even for a great acceleration of the type a = 3500 g, because the initial distance is very small, about 0.02 mm. In analogy with the previous case, the energy of the shock is dissipated by the movement of themagnet 6, thanks to the friction and / or thedamper 24 or in the mobility chamber of thepolar mass 6. After the shock, themagnet 6, always in contact with the axis, is brought against the stop. In this condition, the axis is subjected to a force of net attraction to themagnet 4, and thus it is brought into contact with it.
Puisque les mécanismes dissipatifs agissent sur le mouvement des aimants et non sur l'axe, la dissipation due au frottement du pivot du balancier est presque nulle lors du fonctionnement normal. Le facteur de qualité du régulateur est donc indépendant de la fonction d'antichoc et peut être beaucoup plus élevé que pour un système mécanique traditionnel.Since the dissipative mechanisms act on the movement of the magnets and not on the axis, the dissipation due to the friction of the pivot of the balance is almost zero during normal operation. The quality factor of the regulator is thus independent of the shockproof function and can be much higher than for a traditional mechanical system.
Dans une configuration alternative, l'axe du composant peut être lui-même un aimant permanent, maximisant ainsi les forces et couples magnétiques.In an alternative configuration, the axis of the component may itself be a permanent magnet, thus maximizing magnetic forces and torques.
Les avantages découlant des caractéristiques de l'invention sont substantiels :
- le recentrage radial de l'axe est toujours garanti exact après le choc ;
- la position d'équilibre axial, et de fonctionnement idéal, est toujours rattrapée après le choc ;
- la résistance aux chocs est supérieure à celle des antichocs traditionnels ;
- les frottements et la dissipation d'énergie sont minimisés ;
- le nombre de composants est limité comparé à d'autres solutions ;
- le système peut être intégré à d'autres éléments magnétiques. A cet effet il comporte avantageusement des moyens de blindage 20 visibles sur la
figure 1 .
- the radial centering of the axis is always guaranteed accurate after the impact;
- the position of axial equilibrium, and of ideal operation, is always caught after the shock;
- impact resistance is higher than traditional shock absorbers;
- friction and energy dissipation are minimized;
- the number of components is limited compared to other solutions;
- the system can be integrated with other magnetic elements. For this purpose it advantageously comprises shielding means 20 visible on the
figure 1 .
Le jeu fonctionnel J déterminé est strictement positif. De préférence, le jeu fonctionnel J déterminé est supérieur ou égal à 0,020 mm.The determined functional game J is strictly positive. Preferably, the functional clearance J determined is greater than or equal to 0.020 mm.
Le choix de la perméabilité magnétique du matériau du composant 1, et la détermination de l'aimantation, selon le cas, de la première masse 4 et de la deuxième masse 6 d'une part, ou/et du composant 1 d'autre part, sont de préférence effectués de façon à ce que les champs magnétiques attirant les première extrémité 2 et deuxième extrémité 3 exercent chacun sur le composant 1 des forces d'attraction supérieures à dix fois la force d'attraction de la pesanteur sur le composant 1.The choice of the magnetic permeability of the material of the
De façon préférée, la densité de champ magnétique au voisinage de la première surface 5 et de la deuxième surface 7 est supérieure ou égale à 100000 A / m.Preferably, the magnetic field density in the vicinity of the
Le dispositif antichoc 10 comporte encore, avantageusement, des moyens de blindage 20 agencés pour interdire l'action de tout champ magnétique à composante radiale par rapport à la direction axiale D, au voisinage des première 5 et deuxième 7 surfaces de contact.The
Dans le mode de réalisation de la
Dans une réalisation particulière, au moins la première surface 5 comporte un revêtement dur ou est constituée par une surface dure d'une entretoise 18 interposée entre la première masse 4 et le composant 1. De façon similaire, une entretoise 19 peut être interposée entre la deuxième masse 6 et le composant 1.In a particular embodiment, at least the
Dans une variante particulière, le dispositif antichoc 10 comporte des moyens de bouclage de champ magnétique entre la première masse 4 et la deuxième masse 6.In a particular variant, the
Dans un autre mode de réalisation, l'attraction entre les masses polaires 4, 6, et le composant 1 est de nature électrostatique. La notion de permittivité relative ou constante diélectrique se substitue alors à la notion de perméabilité magnétique, et la notion de champ électrostatique se substitue à celle de champ magnétique. La construction du dispositif antichoc 10 est entièrement similaire, et est dimensionnée en fonction des champs électrostatiques permanents établis entre le composant 1 et les masses polaires 4 et 6.In another embodiment, the attraction between the
Dans cette version, le dispositif antichoc 10 concerne la protection d'un composant horloger 1 en matériau au moins partiellement conducteur ou au moins partiellement électrisé à une première extrémité 2 et à une deuxième extrémité 3. Selon l'invention, ce dispositif antichoc 10 comporte, de part et d'autre desdites première 2 et deuxième 3 extrémités, à une distance d'entrefer supérieure, de la valeur d'un jeu fonctionnel déterminé J, à l'entraxe entre la première extrémité 2 et la deuxième extrémité 3, une première surface 5 d'une première masse polaire 4 et une deuxième surface 7 d'une deuxième masse polaire 6, lesquelles masses polaires 4 ; 6 sont agencées pour, ou bien être attirée chacune par un champ électrostatique émis par une des première extrémité 2 ou deuxième extrémité 3 du composant 1, ou bien pour générer chacune un champ électrostatique attirant une des première extrémité 2 ou deuxième extrémité 3 du composant 1, ces champs électrostatiques étant d'intensité différente au niveau de la première extrémité 2 et de la deuxième extrémité 3, de façon à ce que les forces d'attraction électrostatiques s'exerçant sur le composant 1 à ses deux extrémités 2, 3 soient d'intensité différente, de façon à attirer le composant 1 par une de ses deux extrémités, en contact direct ou indirect sur une seule des surfaces 5, 7 des masses polaires 4 , 6. La première masse polaire 4 et la deuxième masse polaire 6 sont chacune mobile dans une chambre entre deux butées 41, 42 respectivement 43, 44.In this version, the
En somme, dans ce mode faisant appel à des forces et couples électrostatiques, il est possible d'utiliser un matériau conducteur, soit pour le composant 1 si les masses polaires 4 et 6 sont électrisées et chargées avec une énergie suffisante, soit pour les masses polaires 4 et 6 si c'est le composant 1 qui est électrisé et chargé, ce matériau conducteur est polarisé par induction grâce aux pièces qui sont chargées de manière permanente. Une variante similaire est obtenue avec l'utilisation d'un diélectrique, isolant ou semi-conducteur, à la place d'un conducteur, la polarisation est alors limitée à la surface du diélectrique, et la force et le couple d'attraction sont inférieurs à ceux développés quand le matériau est conducteur, mais permettent encore cette utilisation dans le cas d'une montre.In sum, in this mode using electrostatic forces and couples, it is possible to use a conductive material, either for the
Il est encore possible, dans un autre mode de réalisation, de cumuler l'action de forces et couples électrostatiques et de forces et couples magnétiques.It is still possible, in another embodiment, to combine the action of electrostatic forces and couples and magnetic forces and torques.
Les
La surface d'appui 18A est un secteur sphérique concave poli réalisé dans une pierre 18. Celle-ci est plaquée sur un aimant permanent 4, lequel développe un champ magnétique rémanent supérieur à 1 Tesla. A l'opposé de la pierre 18 par rapport à l'aimant 4 est disposée une pierre d'appui 43 comportant un profil convexe poli. La pierre 18, l'aimant 4 et la pierre d'appui 43, sont insérés ensemble dans un chaton 40, réalisé par exemple en cupro-beryllium. De préférence la pierre 19 et la pierre d'appui 46 sont montées dans le chaton 40 avec un serrage ou un collage, ou un moyen de maitine, garantissant une tenue supérieure à 1 N. Ce chaton 40 coulisse librement dans un bloc 41, lequel comporte une ouverture 34 pour le passage de la première extrémité 2 du composant 1, ici constitué par un ensemble balancier-spiral. Ce bloc 41 comporte, au voisinage de cette ouverture 34, un antichoc radial ou un amortisseur radial 32, constitué notamment par une portée de révolution autour de l'axe D.The bearing surface 18A is a polished concave spherical sector made in a
L'ensemble est assemblé de façon à ce que la première extrémité 2 du composant 1 soit mobile en appui dans la cuvette convexe 18A, et à ce que la pierre d'appui 43 présente son secteur convexe à l'autre extrémité. Ce bloc extérieur 41 fait fonction de butée lors de chocs sur le composant 1.The assembly is assembled so that the
De préférence, la première extrémité 2 du composant ou du balancier 1, comporte une courbure, qui est inférieure à celle de la calotte concave de la pierre 18, afin d'assurer le contact sur un seul pont. La courbure concave 18A de la pierre 18 permet de diminuer la distance d'entrefer entre la masse polaire 6 et la première extrémité 2 du composant 1, et constitue aussi un réservoir pour l'huile.Preferably, the
Du côté de la deuxième extrémité 3 du composant 1, un assemblage similaire est installé. La surface d'appui 19A est un secteur sphérique concave poli réalisé dans une pierre 19. Celle-ci est plaquée sur un aimant permanent 6, lequel développe un champ magnétique rémanent supérieur à 1 Tesla. A l'opposé de la pierre 19 par rapport à l'aimant 4 est disposée une pierre d'appui 46 comportant un profil convexe poli. La pierre 19, l'aimant 6 et la pierre d'appui 46, sont insérés ensemble dans un chaton 44, réalisé par exemple en cupro-beryllium. Ce chaton 44 coulisse librement dans un bloc 45, lequel comporte une ouverture 35 pour le passage de la deuxième extrémité 3 du composant 1. Ce bloc 45 comporte, au voisinage de cette ouverture 35, un antichoc radial ou un amortisseur radial 33, constitué notamment par une portée de révolution autour de l'axe D. L'ensemble est assemblé de façon à ce que la deuxième extrémité 3 du composant 1 soit mobile en appui dans la cuvette convexe 19A, et à ce que la pierre d'appui 46 présente son secteur convexe à l'autre extrémité. La
On comprend que le même assemblage peut être implanté, de façon symétrique, en appui sur la pierre d'appui 43, au voisinage de la première extrémité 2 du composant 1.It is understood that the same assembly can be implanted, symmetrically, bearing on the
Les aimants 4 et 6 sont de préférence des aimants permanents Nd-Fe-B, par exemple de type « Vacodym® » de « Vacuumschmelze GmbH ».The
L'invention concerne encore un pivot magnétique 100 magnétique ou/et électrostatique comportant un composant horloger 1, en matériau au moins partiellement perméable magnétiquement ou au moins partiellement magnétique, à une première extrémité 2 et à une deuxième extrémité 3, ou respectivement au moins partiellement conducteur ou au moins partiellement électrisé à une première extrémité 2 et à une deuxième extrémité 3, et comportant un tel dispositif antichoc 10.The invention also relates to a
De préférence, ce pivot 100 magnétique ou/et électrostatique comporte des moyens d'accès pour l'insertion du composant 1 dans l'entrefer, ou bien est réalisé démontable en plusieurs parties comportant des moyens de coopération entre eux ou/et avec un pont 31 ou/et une platine 30 pour permettre le montage du composant 1 en appui par sa première extrémité 2 sur une première partie comportant la première surface 5 et la première masse 4, préalablement au montage d'une deuxième partie comportant la deuxième surface 7 et la deuxième masse 6.Preferably, this
Avantageusement, un pivot 100 magnétique ou/et électrostatique tel que représenté sur la
Dans le cas où le composant 1 est animé d'un mouvement de pivotement autour de la direction axiale D, le pivot 100 magnétique ou/et électrostatique comporte avantageusement un composant 1 qui est équilibré dynamiquement, pour sa vitesse de pivotement maximale, autour d'un axe longitudinal joignant la première extrémité 2 et la deuxième extrémité 3.In the case where the
De préférence, la première extrémité 2 du composant 1 est agencée avec une surface de contact ponctuelle avec la première surface 5, la surface de contact ponctuelle étant localement sphérique ou conique.Preferably, the
Avantageusement, la première surface 5 comporte une surface de réception agencée pour coopérer avec la première extrémité 2, la surface de réception étant creuse et localement sphérique ou conique.Advantageously, the
Dans une application préférée à un oscillateur, le composant 1 est un balancier dont l'axe de pivotement est confondu avec la direction axiale D.In a preferred application to an oscillator, the
On comprend qu'un tel pivot 100 magnétique ou/et électrostatique équipé d'un tel dispositif antichoc 10 peut alors adopter différentes configurations :
- il comporte
un composant 1 comportant une partie sensiblement arbrée en matériau perméable magnétiquement, ou respectivement conducteur, et la première masse 4 et la deuxième masse 6 sont chacune en matériau magnétique, ou respectivement en matériau au moins partiellement électrisé; - il comporte
un composant 1 comportant une partie sensiblement arbrée en matériau magnétique, ou respectivement en matériau au moins partiellement électrisé, et la première masse 4 et la deuxième masse 6 sont chacune en matériau perméable magnétiquement ou respectivement conducteur; - il comporte
un composant 1 comportant une partie sensiblement arbrée en matériau magnétique, ou respectivement en matériau au moins partiellement électrisé, et la première masse 4 et la deuxième masse 6 sont chacune en matériau magnétique, ou respectivement en matériau au moins partiellement électrisé.
- it comprises a
component 1 comprising a substantially tree-shaped portion of magnetically permeable material, or respectively conductive, and thefirst mass 4 and thesecond mass 6 are each magnetic material, or respectively at least partially electrified material; - it comprises a
component 1 comprising a substantially tree-shaped portion of magnetic material, or respectively at least partially electrified material, and thefirst mass 4 and thesecond mass 6 are each made of magnetically permeable material or respectively conductive; - it comprises a
component 1 comprising a substantially tree-shaped portion of magnetic material, or respectively at least partially electrified material, and thefirst mass 4 and thesecond mass 6 are each magnetic material, or respectively at least partially electrified material.
Naturellement il est possible de créer une configuration avec des champs de nature différente au deux extrémités du composant 1, magnétique à une extrémité, électrostatique à l'autre.Naturally it is possible to create a configuration with fields of different nature at the two ends of the
L'invention concerne encore un mouvement d'horlogerie 1000 comportant au moins un tel dispositif antichoc 10, ou/et au moins un tel pivot 100 magnétique ou/et électrostatique.The invention also relates to a
L'invention concerne encore une pièce d'horlogerie comportant au moins un tel mouvement d'horlogerie 1000, ou/et au moins un tel dispositif antichoc 10, ou/et au moins un tel pivot 100 magnétique ou/et électrostatique.The invention also relates to a timepiece comprising at least one
Claims (21)
- Magnetic or/and electrostatic pivot (100) including a timepiece component (1), said timepiece component (1) being made of material that is, either at least partially magnetically permeable or at least partially magnetic, or/and of material that is either at least partially conductive or at least partially electrized, said component (1) including a first end (2) and a second end (3), and being made of a material that is either at least partially magnetically permeable or at least partially magnetic at said first end (2) and at said second end (3), or respectively either at least partially conductive or at least partially electrized at said first end (2) and at said second end (3), said pivot (100) including an anti-shock device (10) for the protection of said timepiece component (1), said anti-shock device (10) including a chamber (1A) in which or/and said component (1) is pivotally mounted between said first end (2) and said second end (3),characterized in that said anti-shock device (10) includes, on both sides of said first (2) and second (3) ends, on the one hand, means for attracting said first end (2) to keep said first end (2) abutting on a first pole piece (4), and on the other hand, in proximity to a second pole piece (6), means for attracting said second end (3) towards said second pole piece (6), and in that said means for attracting said first end (2) on the one hand, and said means for attracting said second end (3) on the other hand, can move along an axial direction (D) between stop members, and further characterized in that said first pole piece (4) and said second pole piece (6) are distinct from said component (1), and are each located on the periphery of or in proximity to said chamber (1A), and are each made of material that is either at least partially magnetic or at least partially magnetically permeable, or/and or/and respectively of material that is either at least partially electrized or at least partially conductive, and further characterized in that said component (1) is freely mounted inside said chamber (1A) between said pole pieces (4, 6), so as to rest on a support surface in proximity to only one of said pole pieces (4, 6).
- Pivot (100) according to claim 1, characterized in that said anti-shock device (10) includes means for dampening the movement of at least one or of each of said pole pieces (4, 6), or/and elastic return means for elastically returning at least one or each of said pole pieces (4, 6), wherein said damping means or/and said elastic return means are arranged to absorb the energy transmitted to said pole pieces (4, 6) in the event of a shock, and, after said shock, to return at least one or each of said pole pieces (4, 6) to the position of stable equilibrium occupied thereby prior to said shock.
- Pivot (100) according to claim 1 or 2, characterized in that at least said first pole piece (4) or said second pole piece (6) includes guide means (14; 16) arranged to cooperate, under a strong acceleration imparted to said component (1) in the event of a shock, by sliding along an axial direction (D), with complementary fixed guide means (15; 17) comprised in said device (10).
- Pivot (100) according to any of the claims 1 to 3, characterized in that said anti-shock device (10) includes means for damping the movement of at least one or each of said pole pieces (4, 6), arranged to absorb the energy transmitted to said pole pieces (4, 6) in the event of a shock, and after said shock, to return at least one or each of said pole pieces (4, 6) to the position of stable equilibrium occupied thereby prior to said shock, and in that said damping means is of the viscous friction type, or said damping means includes a compressible fluid between said pole piece (4, 6) concerned and a stop member (42, 44) which limits the travel thereof to the opposite side to said component (1), or said damping means includes a deformable shape memory shock-absorber (23, 24), arranged to dissipate the kinetic energy from a shock and to return to the initial shape thereof after a shock.
- Pivot (100) according to claim 4, characterized in that said damping means is of the viscous friction type.
- Pivot (100) according to claim 4, characterized in that said damping means includes a compressible fluid between said pole piece (4, 6) concerned and a stop member (42, 44) which limits the travel thereof to the opposite side to said component (1).
- Pivot (100) according to claim 4, characterized in that said damping means includes a deformable shape memory shock-absorber (23, 24), arranged to dissipate the kinetic energy from a shock and to return to the initial shape thereof after a shock.
- Pivot (100) according to claim 7, characterized in that said deformable shape memory shock-absorber (23, 24) is formed by an elastic arm (50) fixed to a plate (30) or a bridge (31) and which includes a free end, which abuts on a convex calotte of a support jewel (46) on at least one contact surface.
- Pivot (100) according to claim 7 or 8, characterized in that said movement damping means includes a block (41, 45) in which a setting (40, 44) slides freely, which together hold a jewel (18, 19) including a concave support surface (18A, 19A) of said first or second end (2, 3) of said component (1), said jewel (18, 19) resting on one said pole piece (4, 6), which in turn abuts on a support jewel (43, 46) capable of cooperating with one said deformable shape memory shock-absorber (23, 24).
- Pivot (100) according to any of claims 1 to 9, characterized in that said timepiece component (1) is made of material that is at least partially magnetically permeable or at least partially magnetic at a first end (2) and at a second end (3), and in that said anti-shock device (10) includes, on both sides of said first (2) and second (3) ends, at a greater air-gap distance, by the value of a determined operational play (J), than the distance of centres between said first end (2) and said second end (3), a first surface (5) of a first pole piece (4) and a second surface (7) of a second pole piece (6), wherein said poles pieces (4, 6) are arranged either each to be attracted by a magnetic field transmitted by one of said first end (2) or second end (3) of said component (1), or each to generate a magnetic field attracting one of said first end (2) or second end (3) of said component (1), and wherein said magnetic fields have a different intensity at said first end (2) and said second end (3), such that the magnetic attraction forces being exerted on said component (1) at the two ends (2, 3) thereof are of different intensity, so as to attract said component (1) via one of the said two ends thereof, in direct or indirect contact onto only one of said surfaces (5, 7) of said pole pieces (4, 6), and in that said first pole piece (4) and said second pole piece (6) can each move inside a chamber between two stop members (41, 42; 43, 44).
- Pivot (100) according to claim 10, characterized in that said anti-shock device (10) includes shielding means (20), arranged to prevent the action of any magnetic field with a radial component relative to said axial direction (D), in proximity to first (5) and second (7) contact surfaces.
- Pivot (100) according to the claim 11, characterized in that said shielding means (20) includes at least one tubular part (21, 22), centred on said axial direction (D) and surrounding said first pole piece (4) and said second pole piece (6) and at least said second end (3) of said component (1).
- Pivot (100) according to any of claims 10 to 12, characterized in that said pivot (100) includes a said component (1) including a substantially spindle-shaped part made of magnetically permeable material, and in that said first pole piece (4) and said second pole piece (6) are each made of magnetic material.
- Pivot (100) according to any of claims 10 to 12, characterized in that said pivot (100) includes a said component (1) including a substantially spindle-shaped part made of magnetic material, and in that said first pole piece (4) and said second pole piece (6) are each made of magnetically permeable material.
- Pivot (100) according to any of claims 10 to 12, characterized in that said pivot (100) includes a said component (1) including a substantially spindle-shaped part made of magnetic material, and in that said first pole piece (4) and said second pole piece (6) are each made of magnetic material.
- Pivot (100) according to any of claims 1 to 9, characterized in that said timepiece component (1) is made of material that is at least partially conductive or at least partially electrized at a first end (2) and at a second end (3), characterized in that said anti-shock device (10) includes, on both sides of said first (2) and second (3) ends, at a greater air-gap distance, by the value of a determined operational play (J), than the distance of centres between said first end (2) and said second end (3), a first surface (5) of a first pole piece (4) and a second surface (7) of a second pole piece (6), wherein said poles pieces (4, 6) are arranged either each to be attracted by an electrostatic field transmitted by one of said first end (2) or second end (3) of said component (1), or each to generate an electrostatic field attracting one of said first end (2) or second end (3) of said component (1), and wherein said electrostatic fields have a different intensity at said first end (2) and said second end (3), such that the electrostatic attraction forces being exerted on said component (1) at the two ends (2, 3) thereof are of different intensity, so as to attract said component (1) via one of the said two ends thereof, in direct or indirect contact onto only one of said surfaces (5, 7) of said pole pieces (4, 6), and in that said first pole piece (4) and said second pole piece (6) can each move inside a chamber between two stop members (41, 42; 43, 44).
- Pivot (100) according to claim 16, characterized in that said pivot (100) includes a said component (1) including a substantially spindle-shaped part made of conductive material, and in that said first pole piece (4) and said second pole piece (6) are each made of at least partially electrized material.
- Pivot (100) according to claim 16, characterized in that said pivot (100) includes a said component (1) including a substantially spindle-shaped part made of at least partially electrized material, and in that said first pole piece (4) and said second pole piece (6) are each made of conductive material.
- Pivot (100) according to claim 16, characterized in that said pivot (100) includes a said component (1) including a substantially spindle-shaped part made of at least partially electrized material, and in that said first pole piece (4) and said second pole piece (6) are each made of at least partially electrized material.
- Timepiece movement (1000) including at least one pivot (100) according to any of claims 1 to 19.
- Timepiece including at least one timepiece movement (1000) according to claim 20, or/and at least one pivot (100) according to any of claims 1 to 19.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11769865.4A EP2638437B1 (en) | 2010-11-09 | 2011-10-12 | Magnetic and/or electrostatic shock absorber |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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EP10190511.5A EP2450759B1 (en) | 2010-11-09 | 2010-11-09 | Magnetic shock absorber |
EP11769865.4A EP2638437B1 (en) | 2010-11-09 | 2011-10-12 | Magnetic and/or electrostatic shock absorber |
PCT/EP2011/067817 WO2012062523A1 (en) | 2010-11-09 | 2011-10-12 | Magnetic and/or electrostatic shock absorber |
Publications (2)
Publication Number | Publication Date |
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EP2638437A1 EP2638437A1 (en) | 2013-09-18 |
EP2638437B1 true EP2638437B1 (en) | 2015-08-26 |
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EP10190511.5A Active EP2450759B1 (en) | 2010-09-11 | 2010-11-09 | Magnetic shock absorber |
EP11769865.4A Active EP2638437B1 (en) | 2010-11-09 | 2011-10-12 | Magnetic and/or electrostatic shock absorber |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
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EP10190511.5A Active EP2450759B1 (en) | 2010-09-11 | 2010-11-09 | Magnetic shock absorber |
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US (1) | US8579501B2 (en) |
EP (2) | EP2450759B1 (en) |
JP (1) | JP5351240B2 (en) |
CN (1) | CN102566394B (en) |
CH (1) | CH704062A2 (en) |
HK (1) | HK1173237A1 (en) |
RU (1) | RU2565323C2 (en) |
WO (1) | WO2012062523A1 (en) |
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FR1314364A (en) * | 1960-06-15 | 1963-01-11 | New combination of magnets for axle suspension together with the maintenance of an electric clockwork movement | |
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FR1339728A (en) * | 1962-10-18 | 1963-10-11 | Siemens Ag | Bearing, especially lower bearing for electric meters with magnetic device for holding the counting rotor |
JPS4019911Y1 (en) * | 1964-06-19 | 1965-07-12 | ||
DE1815099A1 (en) * | 1968-12-17 | 1970-09-24 | Mauthe Gmbh Friedr | Oscillator as a gear folder for electric watches in particular |
IT942651B (en) * | 1971-09-30 | 1973-04-02 | Elettrorava Spa | RADIAL MAGNETIC BEARING |
JPS54130445U (en) * | 1978-03-03 | 1979-09-10 | ||
US4308605A (en) * | 1980-02-12 | 1981-12-29 | Ayer Henry E | Balance wheel assembly |
JPS60167814U (en) * | 1984-04-16 | 1985-11-07 | 河口湖精密株式会社 | Rotating shaft support structure |
SE9701959D0 (en) * | 1997-05-26 | 1997-05-26 | Global Hemostasis Inst Mgr Ab | Bearing device |
DE19854063A1 (en) * | 1998-11-24 | 2000-10-19 | Vladimir Jagmann | Magnetic bearing system, e.g. for watches, comprises magnetisable spindle suspended between poles of magnets arranged to oppose effect of gravity |
JP2002029330A (en) * | 2000-07-18 | 2002-01-29 | Nok Vibracoustic Kk | Sound absorption structure |
GB0018996D0 (en) * | 2000-08-03 | 2000-09-20 | New Transducers Ltd | Bending wave loudspeaker |
US20030169888A1 (en) * | 2002-03-08 | 2003-09-11 | Nikolas Subotic | Frequency dependent acoustic beam forming and nulling |
CN2770039Y (en) * | 2005-02-01 | 2006-04-05 | 广州新静界消音材料有限公司 | Sound absorption plate structural member |
-
2010
- 2010-11-09 CH CH01873/10A patent/CH704062A2/en not_active Application Discontinuation
- 2010-11-09 EP EP10190511.5A patent/EP2450759B1/en active Active
-
2011
- 2011-10-12 WO PCT/EP2011/067817 patent/WO2012062523A1/en active Application Filing
- 2011-10-12 EP EP11769865.4A patent/EP2638437B1/en active Active
- 2011-11-07 US US13/290,606 patent/US8579501B2/en active Active
- 2011-11-08 RU RU2011145346/28A patent/RU2565323C2/en not_active IP Right Cessation
- 2011-11-09 CN CN201110353574.3A patent/CN102566394B/en active Active
- 2011-11-09 JP JP2011245493A patent/JP5351240B2/en active Active
-
2013
- 2013-01-10 HK HK13100387.6A patent/HK1173237A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
CH704062A2 (en) | 2012-05-15 |
CN102566394B (en) | 2014-12-10 |
JP2012103250A (en) | 2012-05-31 |
RU2011145346A (en) | 2013-05-20 |
RU2565323C2 (en) | 2015-10-20 |
CN102566394A (en) | 2012-07-11 |
JP5351240B2 (en) | 2013-11-27 |
EP2638437A1 (en) | 2013-09-18 |
US20120113767A1 (en) | 2012-05-10 |
EP2450759A1 (en) | 2012-05-09 |
EP2450759B1 (en) | 2020-08-12 |
WO2012062523A1 (en) | 2012-05-18 |
US8579501B2 (en) | 2013-11-12 |
HK1173237A1 (en) | 2013-05-10 |
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