Patent Application
20190159544
This application is based upon French Patent Application No. FR 17/71289, filed Nov. 30, 2017, the disclosure of which is hereby incorporated by reference thereto in its entirety, and the priority of which is claimed under 35 U.S.C. § 119.
The invention relates to a strap for retaining and tightening a sports boot. More particularly, the present invention relates to a so-called lower leg tightening strap, as it retains and tightens the upper portion of a sports boot against the lower leg of a user. Straps of this type are used in ski boots, and in particular in boots comprising a rigid shell and an inner comfort element referred to as an inner liner,
In the practice of downhill alpine skiing or alpine ski touring, the downhill phases, strictly speaking, require a solid rear support in the area of the user's lower leg. Therefore, the majority of ski boots include a collar, at least the rear portion of which is rigid and mechanically takes support on the shell base of the boot. In addition to the various boot closure devices that make it possible to adjust the shell against the foot of the user, a tightening device is provided to connect the lower leg of the user to the rear portion of the collar of the boot.
In the prior art, such lower leg straps include a first strap portion, for example anchored to the lateral side of the collar, a second strap portion then anchored to the medial side of the collar, mechanisms for pairing the two strap portions and mechanisms for adjusting the length of one of the two strap portions. The patent documents EP 1 484 992-B1 and US 2005/0102860-A1 describe such a device, in which the pairing mechanisms are comprised of a buckle attached to one end of the first strap portion and provided to receive the passage of the second strap portion. The length adjustment mechanisms are comprised of two complementary portions of self-gripping bands (that is, bands comprising hook-and-loop fastening portions, such as of the Velcro® type).
In the prior art, it has been proposed to include elastic elements or portions in the lower leg tightening devices. Depending upon the elastic modulus of the elastic elements present in the tightening devices, greater comfort or greater performance will be achieved, but it is not be possible to obtain both at the same time. This is particularly the case in the ski boot disclosed in the patent documents EP 1 087 676-B1 and U.S. Pat. No. 6,026,594-A, in which the positioning of a tightening device having an elastic portion is supposed to provide a surplus of energy improving the performance of the skier. However, if the elastic portion is excessively loose, the user will benefit from greater comfort at the expense of performance.
The present invention provides a lower leg tightening device which will alternatively improve comfort or performance.
The present invention also provide a lower leg tightening device for a sports boot that allows greater modularity of use for the user.
The invention also simplifies the use of the lower leg tightening device for the user.
In view of the foregoing, the invention is directed to a sports boot that includes a shell and a liner, the shell extending upward so as to at least partially surround the lower leg of a user and comprising at least one device for tightening the lower leg of the user, the tightening device including the following:
The user can thus set the sports boot in any of at least two different configurations, each of these configurations being associated with a different state of the second anchoring mechanism, including:
The first anchoring mechanism can be positioned on one side of the boot, that is, medial or lateral, and the second anchoring mechanism can then be positioned on a second side of the boot, that is, medial or lateral.
A third anchoring mechanism can also be provided to connect the second strap portion to the shell. This third anchoring mechanism may comprise a strap and possibly a buckle through which the second strap portion extends.
In one embodiment of the invention, the second anchoring mechanism comprises a hook affixed to the shell and in which the second strap portion extends.
In an alternative embodiment, the second anchoring mechanism comprises a hook affixed to either one of the shell or the second strap portion, the hook cooperating with a ring affixed to the other one of these two elements.
The pairing and length adjustment mechanisms can be in any form known for these types of mechanisms. By way of example and in a non-limiting fashion, either of the following two configurations can be employed:
The invention will be better understood upon reading the description which follows, with reference to the annexed drawings, and in which:
The ski boot 1 is comprised of a rigid shell 2, itself comprising a shell base 22 overlaid by a collar 21. The shell base 22 and the collar 21 are obtained, for example, by injection of any of various types of plastic material, such PA (polyamide), PU (polyurethane), PE (polyethylene?) or any other injectable material. They can also be made using composite materials, in particular fibers (such as carbon, glass, etc.) embedded in a thermosetting or thermoplastic resin. An inner liner 3 is inserted within the shell 2 to provide comfort for the user. The liner is composed of a glued and/or sewn and/or welded assembly of various elements.
The ski boot 1 includes a plurality of closure devices 5 (such as the upper and lower pairs of devices or buckles), and possibly an optional tightening device 4.
The optional device 4 for tightening the lower leg of the user, according to the first embodiment, comprises a first strap portion 41 attached to the collar 21 using a first anchoring mechanism 43. In this case, the first anchoring 43 is permanently affixed or essentially permanently affixed to the medial side of the collar. The first anchoring mechanism 43 may include a rivet or a screw-nut assembly, for example. In an alternative embodiment, mechanisms can be provided to change the precise position of the first anchoring mechanism. For example, an upper position and a lower position may be provided for better adaptation to the morphology of the user. Although a modification of the position of the first anchoring mechanism may be provided, it is nevertheless considered that the attachment of the first anchoring mechanism is permanent or essentially permanent insofar as the first strap portion will always be anchored to the collar, irrespective of the precise position thereof.
The optional tightening device according to the invention comprises a second strap portion 42 which, together with the first strap portion 41, ensures surrounding of the lower leg of the user. Pairing mechanisms 44 and mechanisms 45 for adjusting the length of one of the two strap portions are provided to ensure adaptation to the circumference desired by the user. In the specific case of the first embodiment of the invention, the pairing mechanisms 44 are comprised of a buckle 441 attached to the end of the first strap portion 41 and through which the second strap portion 42 extends. The length adjustment mechanisms 45 comprise two bands made of self-gripping material, such as hook-and-loop fasteners, such as of the of the Velcro® type, which are attached to the second strap portion 42.
According to the invention, a second, non-permanent anchoring mechanism 46 is provided to connect the second strap portion 42 to the collar on the side opposite the side on which the first anchoring mechanism 43 is attached. In this case, the second anchoring mechanism 46 comprises a hook 461 capable of cooperating with a ring 462. The ring 462 is attached to the second strap portion 42 via a first band 421. The hook 461 is attached to the collar 21 via a second band 422,
Optionally, a third anchoring mechanism 47 is provided between the second strap portion 42 and the collar. This third anchoring mechanism is permanent or essentially permanent, meaning that the user will not have to undo it during daily use of the ski boot. In the first embodiment described in
In the second embodiment shown in
The third anchoring mechanism 47 guarantees, among other things, a better positioning of the second strap portion 42, in particular in the configuration of the optional strap which is described hereinafter with reference to
In the configuration of the optional strap described in
The user can select this configuration when performance is desired, that is to say, in order to ski faster and in a more engaged mariner. In this configuration, the liner, and therefore the lower leg of the user, is firmly held in the rigid shell. In terms of proprioception, the skier is aware of the forward and backward support offered simultaneously by the shell 2.
The user can select this configuration when greater comfort is desired. In this configuration, the liner, and therefore the leg of the user, retains the support of the front portion of the base.
Indeed, in the third embodiment of the invention, the pairing mechanisms 44 and the length adjustment mechanisms 45 are combined on the same element referred to as the claw buckle.
The claw buckle includes a buckle 441 attached to the free end of the second strap portion 42, and a claw 451 pivotally mounted in the buckle, such that when the first strap portion 41 is pulled in the direction of tightening, the claw 451 pivots to allow the strap to slide, whereas when the strap attempts to slide in the direction of loosening, the claw is positioned so as to block the passage and prevent sliding.
Secondly, the third embodiment also differs from the second embodiment by the second anchoring mechanism. Indeed, the latter is now only comprised of a simple ring 462 through which the first strap portion 41 extends (
A third anchoring mechanism is provided between the second strap portion 42 and the collar. This third anchoring mechanism is permanent. In this case, the third anchoring mechanism 47 is comprised of a strap 472 attached to the second strap portion 42, on the one hand, and to the collar 21, on the other hand.
The invention is not limited to the three embodiments that are illustrated in
Further, at least because the invention is disclosed herein in a manner that enables one to make and use it by virtue of the disclosure of particular exemplary embodiments, such as for simplicity or efficiency, for example, the invention can be practiced in the absence of any additional element or additional structure that is not specifically disclosed herein.
| Number | Date | Country | Kind |
|---|---|---|---|
| 17 71289 | Nov 2017 | FR | national |
