EP4193864A1 - Alpinskischuh - Google Patents

Alpinskischuh Download PDF

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Publication number
EP4193864A1
EP4193864A1 EP22212685.6A EP22212685A EP4193864A1 EP 4193864 A1 EP4193864 A1 EP 4193864A1 EP 22212685 A EP22212685 A EP 22212685A EP 4193864 A1 EP4193864 A1 EP 4193864A1
Authority
EP
European Patent Office
Prior art keywords
collar
elastic element
shell
screw
arms
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.)
Pending
Application number
EP22212685.6A
Other languages
English (en)
French (fr)
Inventor
Danilo Frada
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rossignol Lange SRL
Original Assignee
Rossignol Lange SRL
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 Rossignol Lange SRL filed Critical Rossignol Lange SRL
Publication of EP4193864A1 publication Critical patent/EP4193864A1/de
Pending legal-status Critical Current

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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
    • A43B5/0427—Ski or like boots characterised by type or construction details
    • A43B5/0452—Adjustment of the forward inclination of the boot leg

Definitions

  • the invention relates to the field of sliding sports, and in particular to sliding sports on snow.
  • the invention relates more particularly to an alpine ski boot comprising a device for articulating a collar on the shell of the boot having a good compromise between rigidity and management of the stresses appearing within the structure of the boot during practice. ski.
  • an alpine ski boot comprises a sole intended to cooperate with the elements of a binding in order to be secured to the upper face of a ski.
  • the sole is surmounted by a shell, intended to cover and protect the foot, and a collar, intended to tighten the lower part of the leg.
  • the collar and/or the shell generally include means for adjusting the tightness of the boot, in order to adapt the support thereof to the user's preference and type of practice.
  • the inside of the shoe is made more comfortable by the presence of a slipper.
  • the collar is generally hinged to the shell by means of a hinge device.
  • the collar comprises two lateral arms extending downwards, intended to come opposite the malleolus.
  • the arms and the shell are pierced with openings through which an axis of rotation of the joint passes, typically formed by a screw and a nut.
  • the angular displacement of the collar relative to the shell is small, of the order of a few degrees. This angular displacement can be useful for walking with the shoes on, but also when skiing, in particular during the flexion/extension phases of the skier's leg, giving the impetus necessary for the correct guidance of the skis when skiing. Examples of such shoes are described in the documents FR2663820 And US4601118 , in which the position of the articulation of the collar relative to the shell is adjustable.
  • the shell and the collar are generally formed from the same plastic material, in particular a thermoplastic material.
  • the material used is rigid, even very rigid, possibly reinforced with fibres, such as glass or carbon fibres, in order to guarantee good support for the foot and leg and better performance when skiing.
  • strong stresses can be applied to the joint during its rotation, in particular during the flexion/extension phases of the leg.
  • the articulation is in fact very stressed, which can lead to deformations, or even the rupture of the rigid materials constituting the shell and the collar.
  • breaks are moreover often observed at the level of the arms of the collar.
  • the need for stiffness in shoes requires manufacturers to choose materials which exhibit low elastic deformation and which are therefore prone to rupture when too much stress is applied to them.
  • the technical problem which the invention sets out to solve is therefore to develop alpine ski boots having a better compromise between rigidity and management of the stresses appearing within the structure of the boot.
  • the Applicant has developed an alpine ski boot whose articulation comprises a main axis, making it possible to effectively carry out the rotation of the cuff relative to the shell, and an elastic element offset on another part of the arm of the cuff .
  • This elastic element deforms during rotation of the collar and exerts a restoring force in the direction opposite to the rotation of the collar, which tends to bring the collar back to its rest position. This recovery movement makes it possible to give more flexibility to the joint and to support the rebound of the foot and the leg, for example during skiing.
  • the support surfaces and the elastic element are arranged such that a forward pivoting of the collar causes the compression of the elastic element in contact with the support surfaces.
  • the elastic element can for example be a spring or even a viscoelastic element such as a part made of an elastomeric material, such as rubber for example.
  • a viscoelastic element has the advantage of being able to at least partially absorb the stresses applied to the joint and of dissipating this absorbed energy, for example in the form of heat.
  • the elastic element is then interposed between the bearing surfaces.
  • the latter can be arranged in various ways, such as for example perpendicular to one another.
  • the support surfaces are flat and parallel to each other so that when the collar rotates, they move in parallel, exerting forces that are substantially equal but in opposite directions on the element. elastic. The compression of the elastic element is then more uniform and the latter does not risk being torn off or escaping from the zone situated between the bearing surfaces.
  • the elastic element is positioned in a housing formed in the outer face of the shell, said housing having dimensions greater than the dimensions of the elastic element to allow the latter to be movable in the housing in order to follow collar movements.
  • the first portion of the nut is positioned in a housing made in the shell so as not to hinder or injure the user.
  • the portion of the nut passing through the first opening is ribbed. These ribs ensure the blocking of the nut in the hull. The nut can thus be force-fitted in the hull. It is then secured to the hull and cannot rotate in the opening of the hull.
  • the support surfaces comprise on the one hand a lug projecting from the internal face of the arms and on the other hand the screw and/or the nut, the forward pivoting of the collar causing the compression of the elastic element between the lug and the screw and/or the nut.
  • the second opening, formed in the collar is oblong in shape and has a height, measured perpendicular to the sole of the shoe, which is greater than the diameter of the screw body.
  • This allows a vertical movement of the collar relative to the shell.
  • This displacement allows adjustment of the lateral inclination of the collar, also called “ canting ” in Anglo-Saxon literature.
  • the adjustment of the canting makes it possible to optimize the grip of edge by compensating by an inclination certain morphologies, such as for example bowed legs.
  • the support surfaces comprise on the one hand a lug projecting from the internal face of the arms and on the other hand a wall of the housing receiving the elastic element, the forward pivoting of the collar causing the compression of the elastic element between the pin and the wall of the housing.
  • the elastic element is integral with the internal face of the arms
  • the abutment means comprise a wall of the housing receiving the elastic element, the forward pivoting of the collar causing the compression of the element elastic against the housing wall.
  • the elastic element is integral with the internal face of the arms.
  • the abutment means comprise the screw, the forward pivoting of the collar causing the compression of the elastic element against the body of the screw.
  • the shoe is oriented so that its front part is on the left, and its rear part is on the right in the diagrams.
  • a shoe 1000 for downhill skiing comprises a sole 400, surmounted by a shell 300 and a collar 200.
  • the shell 300 follows the shape of the foot, while the collar 200 surrounds the lower leg.
  • the collar 200 comprises two side flaps 205, 206 to which are fixed means 207, 208 for adjusting the tightness of the shoe 1000, typically tightening buckles not shown in the figures. Other adjustment means may also be present on the top of the shell 300, but these are not shown in the figures.
  • the adjustment means 207, 208 of the tightening of the shoe 1000 are for example in the form of a system of loops present on one of the side flaps 205, 206 from hooking adjustment notches located on the opposite flap 205, 206.
  • the collar 200 extends at the level of two lateral arms 201 intended to come opposite the malleolus of the user.
  • the arms 201 typically have a height of between 3 and 7 cm and a width of between 3 and 5 cm.
  • the arms 201 may have an elongated trapezoidal shape.
  • the collar 200 can then cover a portion of the shell 300, in particular at the level of the arms 201.
  • the collar 200 is hinged in rotation on the shell 300 of the boot 1000 by means of a hinge device 100.
  • the collar 200 can thus tilt back and forth through an angle of a few degrees during the skier's bending movements, especially when skiing.
  • the articulation device 100 comprises a main axis of rotation 101.
  • the latter is located at the level of the upper part of the arms 201 of the collar.
  • a first opening with a diameter of between 1 and 4 cm is made in the arms 201 of the collar 200 and a second opening of a smaller diameter, typically between 0.2 and 1 cm, is made in the shell 300.
  • a nut can be positioned at the level of the internal part of the shell 300, facing the second opening.
  • a screw is inserted through the first and the second opening so as to cooperate with the nut.
  • the main axis of rotation 101 can also include means making it possible to maintain a minimum distance between the screw and the nut so as to leave free the rotation of the collar 200 with respect to the shell 300.
  • a finishing piece can be positioned outside the end portion of the arm of the collar, facing the second opening.
  • the finishing part then receives the support of the head of the screw and makes it possible to limit the wear of the terminal portion of the arm of the collar.
  • the finishing piece also has a purpose of aesthetics and protection of the hinge device from shocks and scratches.
  • the articulation device 100 further comprises a movement limiting device 151, for example located on the lower portion of the arms 201.
  • a movement limiting device 151 for example located on the lower portion of the arms 201.
  • the movement limiting device 151 comprises two surfaces bearing 152, 153, 202, 212, 303, 313 secured respectively to the collar and to the shell, and an elastic element 154, 164, 174, 184 interposed between said bearing surfaces 152, 153, 202, 212, 303 , 313.
  • the elastic element can for example be a piece of rubber or even a spring.
  • the movement limiting device 151 is in the form of a secondary connecting pin connecting the shell 300 and the collar 200.
  • a first opening 302 with a diameter typically between 0.5 and 3 cm is provided in the shell 300 and a second opening 203 with a diameter between 0.2 and 2 cm is provided in the arms 201 of the collar 200.
  • the second opening 203 may have a recess intended to accommodate the head of a screw.
  • a nut 152 comprising a first portion of round or parallelepipedal shape, of width between 1 and 5 cm is positioned at the level of the internal face of the shell 300.
  • This first portion of the nut is of larger dimensions than the opening arranged in the hull so as not to cross the latter.
  • the first portion of the nut 152 can also have an indentation cooperating with a tool making it possible to adjust the movement limiting device 151.
  • the nut 152 can be inserted into a housing 158 of the internal face of the shell , as shown in the figure 5 , preventing its rotation and also making it possible to limit the total thickness of the movement limiting device 151 by not allowing the nut 152 to protrude from the internal face of the shell 300. This also makes it possible not to hinder or injure the user, avoiding the presence of protruding parts inside the shoe
  • the nut 152 also has a second portion passing through the first opening 302 made in the shell 300.
  • This second portion is preferably of circular or even rectangular section with a diameter or length of between 1 and 3 cm.
  • the second portion of the nut 152 is of hollow tubular shape and may have a thread on all or part of its internal wall.
  • the nut 152 has a total length of between 0.2 and 0.5 cm and an opening sized to receive a screw 153.
  • the nut 152 is made of a plastic or metal material, typically steel.
  • the periphery of the second portion of the nut 152 is ribbed. It can thus be mounted by force in the first opening 302 formed in the shell 300. The ribs thus make it possible to prevent the nut 152 from disengaging or rotating in the first opening 302.
  • the second portion of the nut 152 can may or may not exceed the first opening 302.
  • the shell can be directly tapped, to receive the screw 153. The nut 152 is thus replaced by the tapping of the shell.
  • a screw 153 having a head with a diameter typically between 0.5 and 3 cm and a length between 1 and 3 cm is inserted through the second opening 203 formed in the arms 201 of the collar.
  • the head of screw 153 has an imprint cooperating with a tool making it possible to adjust the movement limiting device 151, such as for example a key or a screwdriver.
  • screw 153 is made of a plastic or metal material, typically steel.
  • the body of the screw may have a thread over all or part of its length.
  • the screw 153 can also include a thread lock, that is to say that a portion of the thread is covered with an adhesive making it possible to limit play, leaks and corrosion.
  • the screw 153 is thus screwed into the second portion of the nut 152.
  • the axis formed by the screw 153 and the nut 152 is integral with the shell 300 and the collar 200 is movable with respect to the assembly formed by the axis and the shell 300.
  • the opening 203 made in the collar 200 preferably has a diameter greater than that of the body of the screw 153 in order to allow the collar 200 to perform its forward or backward rotation freely, or even to also have the possibility of tilting to the right or the left with respect to the shell 300, in particular when the main articulation device 100 comprises a canting adjustment ring, making it possible to modify the lateral inclination of the shoe.
  • This elastic element is interposed between the collar 200 and the shell 300.
  • This elastic element can be a viscoelastic element 154 made of an elastomeric material such as rubber.
  • the viscoelastic element 154 has a substantially parallelepipedal shape with a width comprised between 2 and 5 cm, a length comprised between 1 and 3 cm and a thickness comprised between 0.1 and 0.7 cm.
  • the corners of the viscoelastic element 154 can be rounded. Of course, other shapes could be envisaged for the viscoelastic element 154, such as for example a circular shape.
  • the viscoelastic element 154 also has a central opening 156 making it possible to receive the body of the screw 153 and/or the second portion of the nut 152.
  • the viscoelastic element 154 comprises a protuberance 155, preferably made of the same material as the rest of the piece.
  • the protrusion 155 has a height of between 0.5 and 1 cm and cooperates with a slot 204 made in the arms 201.
  • the protrusion 155 is thus visible from the outside of the shoe 1000. Its function is similar to that a visual marker making it possible to check the correct positioning of the viscoelastic element 154 between the collar 200 and the shell 300.
  • the viscoelastic element 154 When the movement limiting device 151 is at rest, as illustrated in the figure 6 , the viscoelastic element 154 is positioned in the center of a housing 301 of the hull, the width and length of which are greater than the dimensions of the viscoelastic element 154, so that the latter can move in the housing 301 at the same time according to the width and the length of the housing 301.
  • the screw 153 passes through the opening of the viscoelastic element 154 and is housed in the nut 152.
  • the ribs of the nut 152 then make it possible to hold the viscoelastic element 154 on the second portion of the nut 152 to prevent it from being extracted or from rotating in the housing 301.
  • the bearing surfaces comprise on the one hand a lug 202 and on the other hand the screw 153 and/or the nut 152 passing through the viscoelastic element 154. These bearing surfaces are substantially parallel to each other. one relative to the other. Thus, the viscoelastic element is compressed between the two bearing surfaces.
  • the lug 202 is positioned on the internal face of the arms of the collar 200.
  • the lug has a prismatic shape and is advantageously in the same material as the collar, typically in thermoplastic material, for example TPU with a height of between 0.5 and 1 cm.
  • An edge of the prism is arranged perpendicular to the upper face of the viscoelastic element 154 and parallel to the central axis of the screw 153.
  • other shapes can be envisaged for the lug 202, since the lug can form a support surface for the viscoelastic element.
  • the lug 202 does not exert any force on the viscoelastic element 154 and the latter is therefore not compressed.
  • the collar 200 undergoes a quasi translation of its lower part backwards corresponding to the arrow F, making it possible to move the lug 202 at the contact of the viscoelastic element 154.
  • lug 202 extends over the entire width of viscoelastic element 154 so as to compress viscoelastic element 154 uniformly.
  • the movement limiting device 161 comprises a viscoelastic element 164 positioned in a housing 311 formed in the shell 310.
  • the bearing surfaces allowing the viscoelastic element 164 to be compressed are, on the one hand, the edge of the lug arranged perpendicular to the upper face of the viscoelastic element 154 and on the other hand a side wall 303 of the housing 311 made in the outer face of the shell 300. These bearing surfaces are substantially parallel to one another. other.
  • the lug 212 At rest, the lug 212 is not in contact with or at least does not exert any force on the viscoelastic element 164 and the latter is therefore not compressed.
  • the edge of the lug 212 is moved into contact with the viscoelastic element 164.
  • the greater the rotation of the collar 210 the more the lug 212 is translated backwards, according to the arrow F visible on the figure 9 . It then compresses the viscoelastic element 164 against the side wall 303 of a housing 311, as illustrated in the figure 9 .
  • the viscoelastic element 164 can be positioned in contact with a protuberance projecting from the shell 310, the lug 212 then compresses the viscoelastic element 164 against the protuberance.
  • the third embodiment illustrates, in figure 10 And 11 , bearing surfaces with, on the one hand, the internal face of the collar 220, of which the viscoelastic element 174 is made integral via a screw 173 driven into a blind hole of the viscoelastic element 174, and on the other hand, a side wall 313 of the housing 321 formed in the outer face of the shell 320.
  • the bearing surfaces are here perpendicular.
  • the movement limiting device 181 comprises a viscoelastic element 184 positioned between the collar 230 and the shell 330 .
  • viscoelastic element 184 is integral. Indeed, only part of the upper face of the viscoelastic element 184 is secured to the collar 230.
  • the bearing surfaces comprise the body of a screw 183 and/or the body of a nut 184
  • the second bearing surface can be formed by a side wall of a housing 331 formed in the external face of the shell 300 or even by a protuberance against which the viscoelastic element 184 abuts.
  • the bearing surfaces are here perpendicular.
  • the bearing surfaces can be, on the one hand, the external face of the shell 340 against which the viscoelastic element 194 is secured at least in part at the level of its lower face and, on the other hand, a side wall of the 191 arm of the collar 240.
  • the support surfaces or more precisely the surfaces between which the viscoelastic element is constrained are here perpendicular.
  • the viscoelastic element 194 is not compressed.
  • the arm 191 of the collar moves back along the arrow F, and comes into contact with a lateral portion of the element viscoelastic 194. This lateral portion of the viscoelastic element not being integral with the shell 340, it can be compressed.
  • the compression of the elastic element 154, 164, 174, 184, 194 makes it possible to at least partially absorb the stresses applied to the articulation device 100, in particular on the main axis 101 during the rotation of the collar 200, 210, 220, 230, 240.
  • the elastic element 154, 164, 174, 184, 194 exerts a restoring force in the direction opposite to the rotation of the collar 200, 210 , 220, 230, 240, which tends to bring the collar 200, 210, 220, 230, 240 back to its rest position.
  • This recovery movement makes it possible to give more flexibility to the joint and to support the rebound of the foot when skiing.
  • the choice of the material of the viscoelastic element, and of its shape and its dimensions, as well as the geometry of the device makes it possible to influence the amplitude of the movement of the collar. Furthermore, by selecting a more or less elastic material, it is possible to influence the rebound properties of the collar at the end of bending, and to play on the recovery movement for the reverse movement.
  • the choice of material and its damping factor makes it possible to play on the dissipation of part of the kinetic energy linked to the movement of the collar, by shearing effects inside the viscoelastic element. It is thus possible to dampen all or part of the vibrations which may be propagated in the boot during skiing.
  • the invention makes it possible to develop alpine ski boots having a good compromise between rigidity and management of the stresses within the structure when skiing.

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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)
EP22212685.6A 2021-12-13 2022-12-12 Alpinskischuh Pending EP4193864A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2113407A FR3130117A1 (fr) 2021-12-13 2021-12-13 Chassure de ski alpin

Publications (1)

Publication Number Publication Date
EP4193864A1 true EP4193864A1 (de) 2023-06-14

Family

ID=80449066

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22212685.6A Pending EP4193864A1 (de) 2021-12-13 2022-12-12 Alpinskischuh

Country Status (2)

Country Link
EP (1) EP4193864A1 (de)
FR (1) FR3130117A1 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4601118A (en) 1982-07-19 1986-07-22 Calzaturificio Tecnica Spa Ski-boot with a boot leg having adjustable side inclination
FR2663820A3 (fr) 1990-06-29 1992-01-03 Rossignol Sa Chaussure de ski en matiere plastique.
FR2666201A1 (fr) * 1990-08-30 1992-03-06 Rossignol Sa Chaussure de sport, notamment pour la pratique du ski de fond.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4601118A (en) 1982-07-19 1986-07-22 Calzaturificio Tecnica Spa Ski-boot with a boot leg having adjustable side inclination
FR2663820A3 (fr) 1990-06-29 1992-01-03 Rossignol Sa Chaussure de ski en matiere plastique.
FR2666201A1 (fr) * 1990-08-30 1992-03-06 Rossignol Sa Chaussure de sport, notamment pour la pratique du ski de fond.

Also Published As

Publication number Publication date
FR3130117A1 (fr) 2023-06-16

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