EP0902627B1 - Schuh mit einer elastischen vorrichtung zur dämpfung von stössen - Google Patents

Schuh mit einer elastischen vorrichtung zur dämpfung von stössen Download PDF

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Publication number
EP0902627B1
EP0902627B1 EP97924088A EP97924088A EP0902627B1 EP 0902627 B1 EP0902627 B1 EP 0902627B1 EP 97924088 A EP97924088 A EP 97924088A EP 97924088 A EP97924088 A EP 97924088A EP 0902627 B1 EP0902627 B1 EP 0902627B1
Authority
EP
European Patent Office
Prior art keywords
sole
shoe
spring
leaf spring
blades
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.)
Expired - Lifetime
Application number
EP97924088A
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English (en)
French (fr)
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EP0902627A1 (de
Inventor
Frédéric Paradis
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Individual
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Individual
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Publication date
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Publication of EP0902627A1 publication Critical patent/EP0902627A1/de
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Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B21/00—Heels; Top-pieces or top-lifts
    • A43B21/24—Heels; Top-pieces or top-lifts characterised by the constructive form
    • A43B21/30—Heels with metal springs

Definitions

  • the present invention relates to a shoe equipped with a elastic shock absorbing device which can be a shoe of city or more particularly a shoe intended for the practice athletic.
  • the invention aims to minimize the impact force of the heel on the ground with a minimum heel height while maintaining high energy absorption capacity and good stability as well that a good return of the energy stored by the device during compression.
  • the invention aims to provide a shoe of reduced weight including the stiffness of the cushioning device can be adjustable by simple means, and in addition, a cost of reasonable manufacturing.
  • the shoe especially for practicing sport, consists of a upper and a sole comprising a part lower movable relative to an upper part and at least one elastically deformable blade opposing the approximation of said parts, and is characterized in that the blade or blades are arranged in outside the perimeter of the user's foot, working advantageously in a bending mode substantially close to buckling.
  • the blade or blades spring are made of composite materials composed at least in the outer faces of high strength unidirectional fibers mechanical, in particular in glass fibers and / or polyethylene, and / or polyester, and / or carbon, and / or aramid, with a resinous matrix thermosetting or thermoplastic.
  • the approximation of the part lower on the upper part is rotated around an axis transverse, or longitudinal axes.
  • the shoe comprises two side blades with the lower end of each of them arranged plumb with the user's ankle, while _each blade is elongated and has a component opposing the approximation of lower and upper parts of the sole.
  • the blades are tilted while their tilt is adjustable, like, by example, by modifying the length of at least one of the strands of link retaining the upper end of each of said blades.
  • the moment of inertia of the center of the blade is at less equal to the moment of inertia of the lower and upper ends, and that the core of the blade (s) can be made of flexible material such that in elastomer, or rigid plastic, the density at the ends of the blade being at least equal to the density in the center, or in material composite comprising fibers with transverse component.
  • each blades is connected by its lower end to the lower part by lower connecting means arranged directly above the ankle the user, and by its upper end to the upper part by upper connecting means, which are, for example, constituted by a lower housing of blades secured to the lower movable sole, or by a flexible retaining link, one end of which is fixed to the lower sole to pass, on the one hand, over a projection, and on the other hand, under the lower end of the blade to then be fixed there by its other end.
  • lower connecting means arranged directly above the ankle the user
  • upper connecting means which are, for example, constituted by a lower housing of blades secured to the lower movable sole, or by a flexible retaining link, one end of which is fixed to the lower sole to pass, on the one hand, over a projection, and on the other hand, under the lower end of the blade to then be fixed there by its other end.
  • Figures 1, 2 and 3 illustrate a first embodiment.
  • Figure 1 is a side view.
  • Figures 2 and 3 are schematic sectional views along AA showing the shoe in its two extreme positions.
  • Figure 2 is an illustration showing the shoe in position rest.
  • Figure 3 is an illustration showing the shoe in position maximum compression.
  • Figure 4 is a view similar to Figure 2 showing a variant.
  • Figures 5 and 6 are side views illustrating a second embodiment.
  • Figure 7 illustrates a detail of execution of a lower link possible applicable to the embodiment of Figures 5 and 6.
  • Figures 8a and 8b illustrate a detail of execution of another lower link possible applicable to the embodiment of Figures 5 and 6.
  • Figure 9 illustrates in side view an alternative embodiment of hinge for the shoe of the invention.
  • Figures 10 and 11a are views similar to Figures 1 and 2 of another alternative embodiment, FIG. 11b illustrating a detail of execution.
  • Figure 12 is a view similar to Figure 2 showing a another possibility of execution.
  • Figures 13a, 13b and 13c illustrate three ways of exercising the load on the blades, while Figure 14 is a view showing the different curves illustrating the compression of each of the realizations.
  • Figures 15a and 15b are plan views showing different shapes of spring leaves.
  • FIG. 15c is a longitudinal section of a variant of the blade.
  • Figures 15d and 15e are cross-sectional views of two possible variants.
  • Figures 16a and 16b are views in longitudinal section showing two possible execution variants.
  • the shoe (1) according to the invention is constituted in a known manner in itself a rod (2) intended to receive the foot of the user.
  • the sole itself (4) is consisting of a movable lower part (4a) or movable base lower articulated on an upper part or upper sole (4b) around a transverse axis (5).
  • the lower part is advantageously fitted with a wear pad (6).
  • the lower part (4a) forms with the upper part (4b) an open acute dihedral ( ⁇ ) backwards (AR).
  • ⁇ acute dihedral
  • AR backwards
  • the elastic means damping consist of at least one deformable blade elastically (7a, 7b) working in buckling.
  • the shoe has two leaf springs (7a, 7b) arranged laterally on either side of the upper (2) of the shoe in the area located directly above the user's ankle.
  • Each of the blades of springs (7a, 7b) are elongated and extend upwards substantially vertically.
  • each of the blades (7a, 7b) is connected by its lower end (70) to the lower part (4a) by means of lower link and by its upper end (71) to the part upper (4b) by upper connecting means.
  • the lower connecting means consist of a housing lower blades (8a, 8b) secured to the lower movable sole (4a) and arranged directly above the upper blade housing (9a, 9b) integral with the upper sole (4b), while the lower housings (8a, 8b) are plumb with the upper housings (9a, 9b) to hold the blade corresponding (7a) and / or (7b) vertically.
  • Each of the lower housings (8a, 8b) is constituted by a groove open upwards formed by a lower retaining rim (80a, 80b) opening outward to form an upwardly flared housing which allows buckling deformation of the blade retained therein, as shown in Figure 3.
  • Each of the upper housings (9a, 9b) is made up, likewise, by a groove open downwards formed by a retaining rim upper (90a, 90b) opening outwards to form a housing flared down which allows buckling deformation of the blade which is retained there, as illustrated in FIG. 3.
  • the retaining housings (8a, 8b - 9a, 9b) are positioned directly above the user's ankle so that the blades spring (7a) and / or (7b) are also there.
  • the two upper retaining housings (9a, 9b) are produced by the buttress (91) which includes a U open upwards to connect the two upper housings at the upper sole (4b).
  • blocking means to limit the relative pivoting between the two parts of sole and thus limit the maximum opening angle ( ⁇ ) that can form the two flanges (4a, 4b).
  • the means of upper link consist of a flexible link (92) such, for example, that a cable or strap replacing the upper retaining rim (90a, 90b), such as that described above. So the flexible link is fixed by one of its ends to the upper end (71) of one of the blades (7a) to pass under the upper part (4b) and then be fixed by the other of its ends to the other blade (7b).
  • the length of the link (92) could be adjustable so as to vary the maximum compression, and / or the maximum value of the angle ( ⁇ ).
  • Figure 5 shows the position of a hardness greater than that shown in Figure 6, the angle (B2) being less than the angle (B1).
  • a system has been illustrated according to which it is possible to modify the effective length of the front strand (920) attached to the attachment point (922), thanks to a succession of notches (20). Of course such a provision could be adopted for the rear strand (921).
  • each of the blades is retained at its upper end (71) by a link (92) or a cable comprising a front strand (920) and a rear strand (921).
  • the variation of the inclination of blades can be obtained by changing the length of the front strands (920) and rear (921). This modification can be obtained by all appropriate means.
  • the restraint of the lower end (70) of each of the blades (7a, 7b) is suitable and allows, on the one hand, the pivoting of these in its own plane and, on the other hand, the outward movement to allow the buckling of said blades.
  • the lower retainer can be produced as illustrated in the Figure 7 and Figures 8a and 8b.
  • a flexible retaining link (81) is provided, one of which end (82) is fixed to the bottom sole (4a) to pass from a on the one hand, above a projection (83), and on the other hand, under the lower end (70) of the blade to then be fixed by its other end (84).
  • FIGS 8a and 8b show lower retaining means blades, made in the form of a cardan type device consisting by an intermediate piece (85) pivotally mounted on the sole lower (4a) intended to receive, thanks to a groove (86), the end lower (70) of the corresponding blade.
  • the articulation between the lower part (4a) on the upper part (4b) can be carried out in different ways, such as, for example, with a joint with an axis (5), as illustrated in FIG. 1, or with a flexible zone (500), as illustrated in FIGS. 5 and 6, or as it is shown in Figure 9 where the lower part (4a) and the upper part (4b) are surmounted on a flexible deformable link (501).
  • FIGs 10 and 11 illustrate another embodiment according to which the plane of the spring blades (7a, 7b) is not parallel to the plane of general symmetry (P) of the shoe, as in the realizations above, but arranged substantially perpendicular to this plane.
  • the two lateral blades (7a, 7b) are inclined to extend backwards, while a connecting element is provided transverse (10) retaining the upper ends (71) of said two blades.
  • this transverse element (10) extends horizontally behind the user's Achilles heel, and that as in the embodiment of Figures 5 and 6, said ends (70 and 71) are connected to lower parts (4a) and upper parts (4b) via a strand front (920) and a rear strand (921) of a link (92).
  • Figure 11b is a view illustrating an embodiment making it possible to vary the initial inclination of the blades of the embodiment of FIGS. 10 and 11a.
  • a pulley (12) around which is wound the cable (92), said pulley (12) being connected to the transverse element (10) by means of a coupling comprising a succession notches (lOb) integral with an end flange (10a) of the element (10) while a succession of corresponding notches (12a) is integral pulley (12). It is therefore enough, to vary the inclination, to modify winding the cable by pivoting the pulley after having uncoupled from the transverse element (10). It goes without saying that the device is symmetrical with respect to the plane (P).
  • Figure 12 is a view similar to Figure 2 showing a variant according to which the lower sole (4a) is consisting of two movable lower parts (4'a, 4 "a) arranged movable in pivoting relative to the upper part (4b) around two longitudinal axes (400a, 400b).
  • FIGS. 13a, 13b, 13c illustrate three ways of exercising the load on the blades.
  • the blade is straight, and the load F is exerted directly on the axis of the neutral fiber, as in the variant of Figures 1, 2 and 3.
  • the square buckling curve of Figure 14 corresponds to this configuration. Note that if the alignment is perfect, you cannot predict on which side the blade will burn. Also the achievements of blades illustrated in FIGS. 13c and 13b solve this type of problem.
  • the load F is offset relative to the axis of the neutral fiber, the shift "e” gives rise to a moment F x e, before to achieve the critical force of Euler's buckling proper, which allows to obtain a rounded curve as illustrated by curve b of Figure 14.
  • the load is offset more than half the thickness of the blade.
  • Figure 13c illustrates a another variant in which said blade has an initial curvature giving an offset "e” similar to that obtained in the realization of Figure 13b.
  • the spring leaves (7a, 7b) must store a quantity significant energy and withstand a large number of bending cycles with high forces and stresses, this for a minimum weight and a reasonable cost. Thus, they are advantageously made in composite material.
  • the applicant intends to use plies woven of fibers of high mechanical resistance impregnated with a material of thermoplastic or thermosetting resin.
  • the fibers are long carbon fibers with high mechanical resistance and whose modulus of elasticity can vary from 230 to 590 Gpa and the resistance to breaking from 2,450 to 7,000 Mpa. Such values are, of course, superior to those of conventionally known steels.
  • the matrices or resins can be of the thermoplastic or thermosetting type.
  • the spring blades (7a, 7b) can consist of a stack of several woven sheets of fibers, for example, bidirectional, the particular orientation of the fibers constituting each woven sheet having an appropriate orientation so that the blades have the characteristics adequate elasticity.
  • 90 ° fibers allow better resistance to this shear, for example at the heart of the blade, near the neutral fiber, by pultrusion, or by gluing or welding a layer of fiber low volume ratio in matrix with large elastic elongation, on the two sides of the blade.
  • the core of the blade is subjected mainly to shear forces, and contributes little to rigidity, resistance and the stored energy, we can use a construction of the type called sandwich, with plastic lighter than composite at the core, and unidirectional fibers on the faces.
  • Figures 16a and 16b are illustrations of a blade of the type sandwich, whereby a core layer at the heart (75c) is covered by two outer layers (75a, 75b).
  • the central layer (75c) may be rigid or flexible plastic, while the layers external (75a, 75b) are made of composite material as proposed previously, the density at the ends (70, 71) of the heart (75c) of the blade being at least equal to the density of the heart in the center.
  • the leaf springs (7a, 7b) are of elongated shape of low thickness to be able to deform by buckling. Their constitution and their size must be chosen according to the performance at get. Likewise, their width can be either constant, as is illustrated in FIGS. 5, 6, 11a and 15a, either variable, as illustrated in Figures 1 and 15b.
  • Figures 15d and 15e illustrate a variant additional possible that the thickness of the blade is variable, the compression face being for example plane, while the face external (75a) subjected to traction has a transverse curvature, and this, so that the side edges of the blades are thinner than the central part.
  • the thickness of the blades can be constant or variable, as illustrated in figures 15c and 16b (in the longitudinal direction) as in Figures 15d and 15e (in the transverse direction), without depart from the scope of the invention.
  • a hermetic dihedral by a bellows or other type system, so as to avoid any intrusion of foreign bodies such as stones.
  • a device can be combined with known devices of the foam type, air pocket, or linear spring or not, placed in the dihedral.

Landscapes

  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
  • Vibration Dampers (AREA)
  • Fluid-Damping Devices (AREA)

Claims (11)

  1. Schuh (1), insbesondere um Sport zu treiben, der aus einem Schaft (2) und einer Sohle (4) besteht, die einen unteren Teil (4a), der im Vergleich zum oberen Teil (4b) beweglich ist, einen oberen Teil (4b) und mindestens ein verformbares elastisches Federblatt (7a, 7b) umfaßt, welches bei Krafteinwirkung der Annäherung der Teile (4a, 4b) entgegenwirkt, dadurch gekennzeichnet, daß das Federblatt oder die Federblätter (7a, 7b) sich außerhalb des Fußbereiches des Benutzers befindet und den Vorteil hat, sich auf eine Art und Weise zu verbiegen, die sich der Knickung annähert.
  2. Schuh (1) nach Anspruch 1, dadurch gekennzeichnet, daß das Federblatt oder die Federblätter (7a, 7b) sich aus Verbundwerkstoffen zusammensetzen und mindestens in den externen Seiten aus einseitg gerichteter Fasern hoher mechanischer Festigkeit insbesondere aus Fiberglas und/oder Polyäthylen und/oder Polyester und/oder Kohle und/oder Aramidfasern mit einer duroplastischen oder thermoplatischen Harzmatrize besteht.
  3. Schuh (1) nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Annäherung des unteren Teiles (4a) an den oberen Teil (4b) sich durch Drehung um eine transversale Achse (5, 500) oder um Längsachsen (400a, 400b) verwirklichen läßt.
  4. Schuh (1) nach Anspruch 3, dadurch gekennzeichnet, dass er aus zwei seitlichen Federblättern (7a, 7b) besteht, wobei das äusserste untere Ende (70) eines jeden besagten Federblattes vertikal mit dem Knöchel des Benutzers ausgerichtet ist.
  5. Schuh (1) nach Anspruch 3, dadurch gekennzeichnet, daß jedes Federblatt (7a, 7b) lang ist und aus einer Kraftkomponente besteht, die sich der Annäherung des unteren Teiles (4a) und des oberen Teiles (4b) der Sohle (4) widersetzt.
  6. Schuh (1) nach Anspruch 5, dadurch gekennzeichnet, daß die Federblätter schräg sind, wobei die Neigung der Federblätter (7a, 7b) regulierbar ist.
  7. Schuh (1) nach Anspruch 6, dadurch gekennzeichnet, daß die Neigung durch Änderung der Länge mindestens einen der Verbindungsfäden (920, 921) regulierbar ist, die das äußerste obere Ende (71) der besagten Federblätter zurückhalten.
  8. Schuh (1) nach Anspruch 1-7, dadurch gekennzeichnet, daß das Trägheitsmoment in der Mitte des Federblattes mindestens gleich dem Trägheitsmoment des unteren Federnendes (70) und des oberen Federnendes (71) ist.
  9. Schuh (1) nach Anspruch 1-8, dadurch gekennzeichnet, daß der Kern (75c) des oder der Federblätter (7a, 7b) aus einem weichen Material, wie zum Beispiel einem Elastomer, oder einem steifen Plastik, die Kerndichte an den Enden (70, 71) des Kernes (75c) der Federblätter mindestens der Kerndichte des Kernes im Zentrum entspricht, oder aus einem Verbundwerkstoff, der Fasern mit einer transversalen Komponente enthält, besteht.
  10. Schuh (1) nach Anspruch 1-9, dadurch gekennzeichnet, daß jedes Federblatt (7a, 7b) am unteren Ende (70) mit dem unteren Teil (4a) durch ein unteres Verbindungsmittel, welches vertikal mit dem Knöchel des Benutzers ausgerichtet ist und am oberen Ende (71) mit dem oberen Teil (4b) durch ein oberes Verbindungsmittel verbunden ist.
  11. Schuh (1) nach Anspruch 10, dadurch gekennzeichnet, daß die unteren Verbindungsmittel aus einer unteren Federschuh (8a, 8b) gebildet werden untrennbar verbunden mit der unteren beweglichen Sohle (4a) oder die Verbindung durch eine weiche, flexible Abzugverbindung (81) realisiert ist, von der eines der Enden (82) auf der unteren Sohle (4a) festgemacht ist, um anschließend über einen Vorsprung (83) und danach unter dem unteren Ende (70) der Federblätter vorbei geführt zu werden, um mit seinem anderen Ende (84) am Federblatt befestigt zu werden.
EP97924088A 1996-05-13 1997-05-13 Schuh mit einer elastischen vorrichtung zur dämpfung von stössen Expired - Lifetime EP0902627B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9606386 1996-05-13
FR9606386A FR2748372B1 (fr) 1996-05-13 1996-05-13 Chaussure equipee d'un dispositif elastique d'amortissement des chocs
PCT/FR1997/000850 WO1997042845A1 (fr) 1996-05-13 1997-05-13 Chaussure equipee d'un dispositif elastique d'amortissement des chocs

Publications (2)

Publication Number Publication Date
EP0902627A1 EP0902627A1 (de) 1999-03-24
EP0902627B1 true EP0902627B1 (de) 2001-02-21

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EP97924088A Expired - Lifetime EP0902627B1 (de) 1996-05-13 1997-05-13 Schuh mit einer elastischen vorrichtung zur dämpfung von stössen

Country Status (6)

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US (1) US6115942A (de)
EP (1) EP0902627B1 (de)
AT (1) ATE199211T1 (de)
DE (1) DE69704117D1 (de)
FR (1) FR2748372B1 (de)
WO (1) WO1997042845A1 (de)

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US10849387B2 (en) 2012-09-20 2020-12-01 Nike, Inc. Sole structures and articles of footwear having plate moderated fluid-filled bladders and/or foam type impact force attenuation members
US10856612B2 (en) 2012-09-20 2020-12-08 Nike, Inc. Sole structures and articles of footwear having plate moderated fluid-filled bladders and/or foam type impact force attenuation members
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USD814161S1 (en) 2014-03-06 2018-04-03 Diapedia, Llc Footwear orthotic
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Also Published As

Publication number Publication date
WO1997042845A1 (fr) 1997-11-20
DE69704117D1 (de) 2001-03-29
FR2748372B1 (fr) 1998-08-14
US6115942A (en) 2000-09-12
ATE199211T1 (de) 2001-03-15
FR2748372A1 (fr) 1997-11-14
EP0902627A1 (de) 1999-03-24

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