WO2024072229A1 - Chaussure de ski à pointe souple - Google Patents

Chaussure de ski à pointe souple Download PDF

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Publication number
WO2024072229A1
WO2024072229A1 PCT/NO2023/060058 NO2023060058W WO2024072229A1 WO 2024072229 A1 WO2024072229 A1 WO 2024072229A1 NO 2023060058 W NO2023060058 W NO 2023060058W WO 2024072229 A1 WO2024072229 A1 WO 2024072229A1
Authority
WO
WIPO (PCT)
Prior art keywords
boot
sole
cleat
binding
ski
Prior art date
Application number
PCT/NO2023/060058
Other languages
English (en)
Inventor
Thomas GOVERUD-HOLM
Magnus Anderssen
Jørn Frode DANIELSEN
David Klovning Flem
Edward Jones
Svein Ivar MOEN
Ole Martin STORLIEN
Original Assignee
Rottefella As
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Rottefella As filed Critical Rottefella As
Publication of WO2024072229A1 publication Critical patent/WO2024072229A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B5/00—Footwear for sporting purposes
    • A43B5/04—Ski or like boots
    • A43B5/0411—Ski or like boots for cross-country
    • A43B5/0413—Adaptations for soles or accessories associated with soles for cross-country bindings
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B5/00—Footwear for sporting purposes
    • A43B5/04—Ski or like boots
    • A43B5/0411—Ski or like boots for cross-country

Definitions

  • the present invention relates to a cross-country ski boot and a cross-country ski binding system.
  • the conventional mounting point of said pins is a trade-off between several factors, such as the distance between the sole of the foot and the ski/binding, the maximum achievable included angle between the ski boot and ski/binding, sufficient anchoring, among other factors.
  • it is desirable to have the foot as close as possible to the ski i.e., that the distance between the sole of the foot and the ski/binding is as small as possible, and that the included angle between the ski boot and ski/binding is as large as possible and at least greater than a given minimum angle.
  • the rigidity of the ski boot can be increased significantly (both the bending and torsional stiffness, albeit to different degrees for the different cross-country skiing styles: for the skate style, adequate bending and torsional stiffness are both important, whereas for the classic style the same amount of bending and torsional stiffness is not desirable, even though it is important that the ski boot is able bend and twist in a proper manner, which can be better controlled when the pivot point is positioned approximately below the transition between the metatarsals and phalanges of the foot.)
  • an included angle that is too small may affect the movement pattern of the skier by limiting the range of motion, which is clearly not desirable or acceptable. This would affect the skier's ability to convert power generated by the body into forward momentum in the ski track. This could affect different skiers differently and possibly the most mobile/flexible skiers the most. Moreover, an included angle that is too small also poses a safety risk for both the equipment and skier.
  • the forces from a kick-off, slip or fall can be very large, and the geometry of the binding system could potentially result in the creation of large rocker arm/clamping forces between the tip of the ski boot and the binding/ski. Such forces can be transferred through the pivot point or towards the binding/ski in such a way that the equipment can break.
  • the forces exerted on the shins and/or other parts of the lower body/back of the skier can lead to injury of the skier.
  • the equipment breaks on a trip far away from people this in itself could put the skier at risk.
  • the objective of the present invention is to overcome at least one of the above-mentioned disadvantages.
  • Fig. 1 shows a cross-country ski binding
  • Fig. 2 shows the outsole of a boot attached to a cross-country ski binding
  • Figs. 3a and 3b show a boot outsole from different angles
  • Fig. 4 shows a sketch of a foot
  • Fig. 5 shows a cross-country ski binding system in which the boot outsole is in a neutral position
  • Fig. 6 shows a cross-country ski binding system in which the initial included angle of the system has been reached
  • Fig. 7 shows a cross-country ski binding system in which the boot outsole is flexed further, and the reserve included angle has been reached
  • Fig. 8 shows one embodiment of the present invention
  • Figs. 9a-f show different configurations/embodiments of the present invention.
  • Fig. 10 shows an embodiment without a flexor.
  • Fig. 2 shows a cross-country ski boot outsole 2 comprising a heel section 3 and a front section 4 having a boot tip 5.
  • a cleat 6 (not seen) having lateral, protruding pins 7 (barely seen) is shown mounted forward of the transition between the metatarsals and phalanges of the foot. This point or area is denoted as BG in the drawing.
  • Cleat 6 fits into the binding 8 comprising a flexor 9 in that pins 7 are secured in the complementary crib 10, ref. fig. 1.
  • cleat solution itself may vary and that alternative solutions exist. It should also be understood that what is referred to as a cleat 6 may also be integrated into the outsole, that is, it does not need to be releasably attached. What is referred to as a cleat 6 may be provided with various types of attachment mechanisms, not just the protruding pins 7 shown herein.
  • the pins may have a different configuration, may be configured as a conventional NNN pin, or may consist of a rotatable or slidable locking plate.
  • the part of boot tip 5 located forward of cleat 6 is designed to be less rigid so as to yield if the initial included angle p of the binding system is approached. In this manner, a reserve included angle 0 is obtained.
  • ski boot 1 When ski boot 1 is neutrally positioned in binding 8, it will have a neutral included angle a.
  • the above angles are shown in Figs. 5-7 and will be discussed in more detail later.
  • boot tip 5 located forward of cleat 6 deflects or bends along or in front of a line L.
  • boot sole 2 is stiffened by cleat 6 at the exact location where it is normally desired that the boot sole is the most flexible. This may be advantageous when practicing the skate technique as a "clap skate effect" can be obtained, but it may turn out to be disadvantageous when practicing the classic technique, in which a maximum contact and feeling with the surface is preferable, which requires the ski boot and ski boot sole to be very flexible.
  • the boot sole is made less rigid in a region directly in front of cleat 5 - which needs to have a certain extent and considerable stiffness - so that the bending or deflection point of the boot sole is placed in a region which is located significantly further forward than what is common, and which one would normally want to be more rigid (to protect the toes).
  • This moving forward of the bending or deflection point of the boot sole must also take into consideration that the toes can be pinched in an unpleasant or harmful way, which must be taken into consideration when designing the vamp and selecting the bending curve and bending resistance.
  • the bending resistance can be made progressive, i.e., the resistance increases slightly (or a lot) towards the end of the rotational movement.
  • This progressive bending resistance is produced by the flexor 9, which can be configured so that the bending resistance increases as it is compressed when ski boot 1 is rotated and boot tip 5 is pressed into the flexor 9, cf. Fig. 7.
  • the bending resistance of boot tip 5 can be adapted so as to produce a desired bending resistance, either alone or in cooperation with flexor 9.
  • the flexible boot tip 5 may be provided with a resilient member, such as a blade made of metal, carbon fibre or another suitable material, which is configured so that the bending energy is stored during bending and then released when the boot tip is allowed to straighten (cf. Figs. 9d, e).
  • a resilient member such as a blade made of metal, carbon fibre or another suitable material, which is configured so that the bending energy is stored during bending and then released when the boot tip is allowed to straighten (cf. Figs. 9d, e).
  • the bending or deflection point of the ski sole can be designed so as to not cause any discomfort of the foot and particularly of the toes,
  • the boot tip may cooperate with flexor 9 and contribute to the desired progressive bending resistance towards the end of the rotational movement of the ski boot,
  • the goal is a total included angle (P + 0) of 38°, for example.
  • this angle corresponds to the included angle of the current conventional solutions and has proven to work well.
  • Fig. 6 shows a possible included angle of 31°, for example, without the boot tip 5 bending.
  • the bending of the boot tip provides for an additional bending angle 0 of 7°, for example.
  • the distance d off the ski of pivot point 7, the thickness of the binding, the shape of the binding, the shape of the boot sole, etc. will affect both included angles and 0 so that the total included angle + 0 is the result of several design choices.
  • Figs. 3a and b show two different perspective views of the boot sole 2 and cleat 6.
  • a carbon sole or the like extends from heel section 3 to front section 4 up to and including the point at which cleat 5 is terminated in the forward direction, so that the boot tip 5 can be said to extend from cleat 5 and forward.
  • This transition is marked with a line L in Fig. 3b and forward of this line there is only a soft rubber sole and an even softer boot last.
  • Fig. 3b shows boot tip 5 from the underside, with this embodiment having grooves arranged in the front that indicate where the sole/boot is flexible. Again, it is important to note that this is in a region located forward of where it is conventional to make the boot flexible.
  • Fig. 4 shows an outline of a foot.
  • the line BG corresponds to the region forming a transition between the metatarsals and phalanges, i.e., the natural deflection or bending area. Most boots are bendable about line BG as long as the boot is not made to be rigid.
  • Fig. 4 also shows that the point of rotation RPsx is located forward of BG. This area will be stiffened by cleat 6, which must be taken into consideration.
  • the bending line L will be located forward of both BG and RP, yet behind the point of rotation RPNNN of the conventional NNN system. Beside the outline of the foot, it is indicated where the boot may be rigid (4S) and where it will be less rigid (M).
  • the invention is based on a cross-country ski binding system comprising a cross-country ski boot 1 and a cross-country ski binding 8, said ski boot 1 comprising a boot sole 2 having a heel section 3 and a front section 4 with a boot tip 5, wherein under the front section 4 of boot sole 2, in the region forming a transition between the metatarsals and phalanges of a foot, a cleat 6 that comprises one or more pins 7 is provided, said cleat 6 fitting into a complementary crib 10 of a binding 8 that optionally comprises a flexor 9, and wherein said binding system has an initial included angle a.
  • boot tip 5 forward of cleat 6 is (flexurally) softer than any other part of the boot sole 2 so as to yield if the initial included angle p of the binding system is approached, thus providing a reserve included angle 0.
  • the boot tip 5 forward of cleat 6 may have one or more transverse weakening zones or ribs, see Figs. 3b, 9a, 9b, for example.
  • Fig. 7 shows how flexor 9 of the binding is tensioned when the boot is pressed into binding 8. If the boot is not loaded, that is, turned forward or backward relative to the pivot point p, then the boot will be tilted at an angle a as shown in Fig. 5.
  • the angle a is chosen so that the ski is well controlled, i.e., neither the tip of the ski nor the back ski hooks or sinks into the snow.
  • the pretension is also beneficial in preventing the ski from tilting/oscil lating too much.
  • Boot sole 2 may further comprise a stiffening plate or sole 12 extending backwards from cleat 6, see Figs. 9c, 9d, with said boot sole 2 comprising the stiffening plate or sole 12 having a given bending stiffness kb P .
  • Boot sole 2 may further comprise a stiffening plate or sole 13 extending forward of cleat 6, with said boot sole 2 comprising the stiffening plate or sole 13 having a given bending stiffness kf P .
  • the boot sole 2, forward of cleat 6, may comprise just a rubber sole material having a given bending stiffness k g , that is, no stiffening plate or the like is provided in the boot tip 5.
  • the transition 14 between the rear part of the boot sole 2 up to the front part of the cleat 6 and boot tip 5 is softer, e.g. in that one or more transverse weakening zones or ribs, i.e. some kind of flexing zone making the sole bend in the right place and in the right way, are provided, which in turn means that the weakening zone has a bending stiffness k ss that is less than the bending stiffness kb P of stiffening plate or sole 12 that extends backwards from cleat 6, as well as the stiffening plate or sole 13 that extends forwards of cleat 6, where the boot sole 2 comprising the stiffening plate or sole 13 has a given bending stiffness kf P , so that k ss ⁇ kb P and k ss ⁇ kf P , cf. Figs. 9c, 9f.
  • the sole is less rigid further forward, but according to the invention, the sole is soft or flexible in a region located further forward on the sole than what is conventionally considered desirable or natural, i.e., in the area around BG, cf. Fig. 4.
  • a sole exhibits a flexibility that is adapted to the biomechanics of the foot, i.e. the sole has a heel section that lifts the heel and supports the ankles and a joint that supports the arch of the foot up to the transition BG between the metatarsals and phalanges of the foot, where the boot is normally the most flexible, whereafter the boot tip is normally made somewhat stiffer in order to protect the toes (and because the pin of a conventional boot is located under the toes and needs stiffness and sole material to be held in place) and to impart a minimum of torsional stiffness to the boot.
  • a cross-country ski boot 1 comprising a boot sole 2 having a heel section 3 and a front section 4 with a boot tip 5, wherein under the front section 4 of boot sole 2, in the region forming a transition between the metatarsals and phalanges of a foot , a cleat 6 comprising one or more pins 7 is provided, said cleat 6 fitting into a complementary crib 10 of a binding 8 comprising a flexor 9, and said binding system having an initial included angle , said boot tip 5, in front of cleat 6, being (flexurally) less rigid than any other part of boot sole 2, said boot sole 2 comprising a stiffening plate or sole 2; 12 extending backwards from cleat 6, said boot sole 2 comprising the stiffening plate or sole 2; 12 having a given bending stiffness kb P , said boot sole 2, forwards from cleat 6, having a given bending stiffness kf P ; with kb P > kf P , k
  • kf P is the bending stiffness of the front plate or boot tip 5
  • ki is the bending stiffness of the transition L between the rear part of boot sole 2 up to the front section of cleat 6 and boot tip 5 forward of cleat 6
  • kb P is the bending stiffness of the back or heel section 4.
  • Fig. 8 shows an embodiment for the present invention, which basically corresponds to figure 9a.
  • Figs. 9a-f show different configurations of the present invention.
  • Fig. 9a shows a configuration similar to the one shown in Figs. 2 and 3a-b.
  • Fig. 9b shows another design of cleat 6, in which the bending line or zone L can be moved somewhat backwards. This configuration may provide for a greater overall included angle and possibly better comfort. It may also be better suited for diagonal/classic technique.
  • Fig. 9c shows a bending line or zone L that may consist of a weakening line in the general rubber material of the boot sole.
  • Fig. 9a shows a configuration similar to the one shown in Figs. 2 and 3a-b.
  • Fig. 9b shows another design of cleat 6, in which the bending line or zone L can be moved somewhat backwards. This configuration may provide for a greater overall included angle and possibly better comfort. It may also be better suited for diagonal/classic technique.
  • Fig. 9c shows a bending line or zone L that may consist of
  • FIGd and 9e show a resilient, responsive bending plate 13 which will provide a certain bending resistance, and which - alone or in cooperation with a separate flexor 9 - can contribute to a flexor function.
  • all or part of the bending energy may first be stored and then released when the bending angle is reduced, which may contribute to increase the forward momentum in the ski track.
  • Figs. 9e and f show a configuration in which the sole of the boot also has a flexing zone behind the cleat in the region around or behind the line BG.
  • Fig. 10 shows an embodiment without a flexor.
  • the system can be so well balanced that either - at least some - skiers choose to run without a flexor, so it is optional, or the system is delivered without a flexor.
  • the flexor function integrated in the ski boot, similarly to what is shown in Fig. 9d and/or 9e, in that the ski boot is provided with a resilient, responsive bending plate 13 (ref figs. 9d and 9e, not visible in fig. 10) which will provide a certain bending resistance, and which may contribute to a flexor function.
  • responsive is meant that as much as possible of the energy used for bending the flexing plate is returned when the flexing plate is allowed to restraighten.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Abstract

La présente invention concerne un agencement d'un système de fixation de ski de fond comprenant une chaussure de ski de fond (1) et une fixation de ski de fond (8), ladite chaussure de ski (1) comprenant une semelle de chaussure (2) ayant une section de talon (3) et une section avant (4) avec une pointe de chaussure (5), dans laquelle sous la section avant (4) de la semelle de chaussure (2), dans la région (BG) formant une transition entre les métatarses et phalanges d'un pied, un crampon (6) est fourni qui comprend une ou plusieurs broches (7), ledit crampon (6) s'ajustant dans un berceau complémentaire (10) d'une liaison (8), et ledit système de liaison ayant un angle inclus initial α. L'invention est caractérisée en ce que la pointe de chaussure (5), à l'avant du crampon (6), comprend une transition (L) qui est moins rigide (en flexion) que toute autre partie de la semelle de chaussure (2) de façon à céder si l'angle inclus initial (β) du système de liaison est approché, fournissant ainsi un angle inclus de réserve (θ).
PCT/NO2023/060058 2022-09-29 2023-09-28 Chaussure de ski à pointe souple WO2024072229A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20221039 2022-09-29
NO20221039A NO20221039A1 (no) 2022-09-29 2022-09-29 Skisko med myk tupp

Publications (1)

Publication Number Publication Date
WO2024072229A1 true WO2024072229A1 (fr) 2024-04-04

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ID=90478835

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Application Number Title Priority Date Filing Date
PCT/NO2023/060058 WO2024072229A1 (fr) 2022-09-29 2023-09-28 Chaussure de ski à pointe souple

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NO (1) NO20221039A1 (fr)
WO (1) WO2024072229A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6289610B1 (en) * 1997-10-29 2001-09-18 Salomon S.A. Sole for a sport boot and a sport boot including such sole
EP3935984A1 (fr) * 2020-07-09 2022-01-12 Madshus AS Botte de ski dotée d'une structure de connexion pour mouvement pivotant

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6289610B1 (en) * 1997-10-29 2001-09-18 Salomon S.A. Sole for a sport boot and a sport boot including such sole
EP3935984A1 (fr) * 2020-07-09 2022-01-12 Madshus AS Botte de ski dotée d'une structure de connexion pour mouvement pivotant

Also Published As

Publication number Publication date
NO20221039A1 (no) 2024-04-01

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