Patent Application
20220240626
The present invention relates to the field of footwear technology. More particularly, the invention relates to a running shoe having an adaptive upper.
Running shoes, for example sports shoes, tennis shoes, hiking shoes or leisure shoes, are typically retained on the wearer's foot by means of laces or hook and loop fasteners. Hook and loop fasteners have the disadvantage that although they can be easily closed and opened, they lose their original fastening effect after only a short time. Shoelaces, on the other hand, have the disadvantage that they often lead to unpleasant pressure points and the knots can come loose while running, which is especially undesirable during sports. Furthermore, the overall weight of a running shoe is becoming increasingly important, especially in the field of professional sports. Both the use of hook and loop fasteners and laces requires additional components and materials that increase the overall weight of the running shoe.
In the prior art, shoes are known which have no lacing. For example, it is known to provide a shoe with an elastic textile upper which is highly compressed in the unworn state. As soon as the wearer pulls the shoe over the foot, the elastic upper is stretched and pressed against the foot.
However, in the known shoes without lacing, the hold of the foot in the shoe is significantly reduced compared to common shoes with lacing. While a lower hold in leisure shoes is tolerable due to the slow walking speeds of the wearer, the risk of injury during sports increases significantly with such shoes. There are no known fastener-free running shoes that provide good support during sports and can thus adequately replace the common laced embodiments. In particular, it is a problem with lacing-free running shoes to hold the wearer's foot above the sole of the shoe in such a way that the foot cannot slip beyond the periphery of the shoe sole, so that twisting is prevented even when stepping at an angle.
It is therefore the general object of the invention to improve the state of the art in the field of fastener-free running shoes and preferably to overcome one or more of the disadvantages of the prior art.
In some embodiments, a fastener-free running shoe is provided that provides comparable or better support to a laced running shoe.
In further embodiments, a fastener-free running shoe is provided which has a particularly low weight.
In some embodiments, a fastener-free running shoe is provided that stabilizes the wearer's foot while running and is comfortable to wear.
The general object is solved by the independent patent claim. Further advantageous embodiments result from the dependent patent claims, as well as the description and the drawings.
One aspect of the invention relates to a running shoe having a lateral side and a medial side. The running shoe has a heel area (FB), a forefoot area (VB), a midfoot area (MB). The front end of the forefoot area¬forms a shoe tip and the rear end of the heel area forms a heel edge. The running shoe includes a shoe sole and an upper, the upper having a textile base material. In addition, the running shoe has a group of tension straps having at least one compressive tension strap and a group of pulling straps having at least one compressive pulling strap. The group of tension straps and the group of pulling straps are thereby part of the upper and may optionally each extend into or be attached to the sole of the shoe. The group of tension straps is arranged in the heel area and in the midfoot area of the running shoe, and the group of pulling straps is arranged in the forefoot area. In this case, the at least one tension strap is configured such that it exerts an inwardly directed compression force in the worn state. In addition, the at least one tension strap is arranged such that it runs along a non-expanding line (LONE—line of non-extension) of the wearer's foot in the worn state. This means that the tension strap typically runs exclusively on the LONE respectively is arranged above the LONE of the wearer's foot. Thus, when worn, a compressive force acts on the wearer's foot along a LONE. Preferably, the pressure that additionally acts on the foot of the wearer through the at least one tension strap may be between 0 and 100 mmHg (0 to 0.15 atm), preferably between >0 and 100 mmHg (>0 to 0.15 atm). The at least one tension strap may provide a tensile force on the upper of the running shoe.
Preferably, the group of tension straps is arranged only in the heel area and in the midfoot area, but not in the forefoot area, and the group of pulling straps is arranged only in the forefoot area, but not in the heel area. Preferably, the at least one tension strap may be disposed in the heel area such that it extends along a LONE of the wearer's foot in the worn state. Typically, the at least one pulling strap extends from the lateral side of the shoe sole across the running shoe to the medial side of the shoe sole. Optionally, a pulling strap may extend from the medial side of the shoe sole toward, and merge with, a second pulling strap, and thus, in combination with the second pulling strap, extend from the medial side shoe sole across the running shoe toward the shoe sole on the lateral side. Preferably, the at least one tension strap is disposed exclusively above the LONE of the wearer's foot, and/or disposed exclusively above an area of LONES. An area of LONES refers to an area formed by a group of LONES extending in the same direction over the foot of the wearer. In particular, the area can be delimited or defined by the outer two LONES of the group.
In some embodiments, the group of tension straps surrounds the entry opening from substantially all sides.
The upper of the running shoe typically completely encloses the wearer's foot in the worn state. Thus, the foot is not directly exposed or accessible to the environment.
A running shoe within the meaning of the present invention may preferably denote a closed shoe. In particular, it may be a sports shoe for athletics, tennis, hiking, trekking or the like, or a leisure shoe. The skilled person understands that the medial side of the running shoe in the worn state denotes the outer inner side of the shoe. Thus, in a pair of running shoes, the two medial sides face each other. When worn, the lateral side of the running shoe denotes the outer side of the shoe and is thus on the side of the outer instep. Typically, the forefoot area is located in the area of the toes and the ball of the foot, and the heel area is located in the area of the heel. The midfoot area lies between the heel area and the forefoot area. The length of the forefoot area in the longitudinal direction can be, for example, 40-55%, the heel area in about 25-35%, and the midfoot area about 10-35% of the total length of the shoe sole. The heel edge is located opposite the shoe tip and thus denotes the vertical rear edge of the running shoe.
In some embodiments, the running shoe is a fastener-free running shoe. For purposes of the invention, a fastener-free running shoe refers to a running shoe that does not have laces, zippers, hook and loop fasteners, buttons, snap closures, or similar fasteners and attachments.
The group of tension straps or the pulling straps may each comprise only one tension strap or pulling strap or several tension straps or pulling straps. The skilled person understands that the term “the at least one tension/pulling strap” can refer to both the singular and the plural.
Typically, the at least one tension strap and/or the at least one pulling strap is compressed in the unworn state. In the worn state, a strong t force, or compression force, can be exerted.
A tension strap is typically positioned in the upper of the running shoe such that it rests on a “LONE” of the wearer's foot when worn. A LONE is a hypothetical line extending across the wearer's foot that is neither stretched nor compressed during the running motion (see Jenkins, Dressing for Altitude: U.S. Aviation Pressure Suits, Wiley Post to Space Shuttle, U.S. National Aeronautics and Space Administration, ISBN 9780160901102 and Iberall, J. Basic Engineering, 1970, 251-264). If the line describes a closed geometric figure, for example a circle or an ellipse, it does not undergo any circumference change during the running motion. The compressive tension strap exerts a compression on the wearer's foot when at rest. If a tension strap is arranged in the upper in such a way that it lies on a LONE when worn, this has the advantage that the tension strap is essentially not stretched or tightened during the running movement. A compression that is large enough to keep the running shoe on the wearer's foot at rest without exerting an uncomfortable feeling of pressure thus also does not create a feeling of pressure during the running movement. Thus, a relatively strong compression can be employed, which on the one hand causes a good hold of the foot in the running shoe, but on the other hand does not lead to an unpleasant feeling of pressure even during the running movement. Due to the at least one tension strap, a fastener can thus be dispensed with. This has the advantage that less force has to be applied during running, since a fastener, for example a common lacing, causes a restriction of movement which has to be overcome by the runner.
The at least one tension strap and/or the at least one pulling strap typically has two engagement points on the running shoe, in particular on the shoe sole or on the upper part of the running shoe. The points of engagement define the starting and the end point of the tension strap and/or the pulling strap extending at least over the upper part. In embodiments having a plurality of pulling straps and/or having a plurality of tension straps, a plurality of pulling straps and/or tension straps within the respective group of tension straps or group of pulling straps may cross over, make contact with, or merge into one another.
It has been observed that the group of tension straps is preferably arranged in the heel area and midfoot area. In addition, tension straps in the forefoot area can be dispensed with, as their stabilizing effect is required primarily in the heel and midfoot area.
In further embodiments, the at least one pulling strap is arranged in such a way that it can exert a pulling force against the pronation of the foot in the forefoot area. This reduces the angular velocity of pronation during the running movement and increases the cushioning effect during treading. In addition, by reducing the speed of pronation, a stabilizing and supporting function of the foot during running is produced. The at least one compressing pulling strap can be arranged in such a way that a pulling force is exerted from the medial side towards the lateral side of the running shoe, preferably from the medial side of the shoe sole to the lateral side of the shoe sole of the running shoe.
Preferably, the at least one pulling strap is directly connected to the sole of the shoe on both the medial side and the lateral side. Typically, the pulling straps are arranged such that they each, or in conjunction with each other, extend from the medial side across the instep of the wearer's foot to the lateral side.
In some embodiments, the group of pulling straps includes a first pulling strap extending from the shoe sole on the medial side to the shoe sole on the lateral side, which exerts a pulling force between the medial side and the lateral side of the shoe sole. The first pulling strap thus extends over the instep of the foot when worn. The pulling strap may be directly connected to the sole of the shoe or may be located above the sole of the shoe. The pulling strap has the effect of reducing the angular velocity of pronation of the foot during tread, thereby increasing the cushioning effect.
Typically, the first pulling strap can run diagonally from the medial side to the lateral side in the direction of the heel area. This additionally improves the cushioning effect.
In some embodiments, the first pulling strap may be arranged such that it is positioned in front of the hallux of the wearer in the direction of running in the worn state. Preferably, the first tension strap runs tangentially to the hallux.
In further embodiments, the first pulling strap divides the forefoot area of the upper into a first and a second functional zone. In this case, the first functional zone extends from the tip of the shoe to the first pulling strap and is pretensioned in the longitudinal direction. This allows the material to be compressed in the longitudinal direction, i.e., along the tarsal bones (metatarsals) of the wearer, thereby reducing the force to be applied by the wearer during walking. In the latitudinal direction, the first functional zone may be force neutral. The term “force neutral” means that the first functional zone is substantially neither prestressed nor pre-stretched in the latitudinal direction at rest. In particular, the first functional zone ensures that the foot is maintained above the sole of the shoe and cannot slip partially beyond its periphery.
It is known to the skilled person how a pre-tension, i.e., a contraction, or a pre-expansion, i.e., an expansion of a functional zone can be achieved. For example, this can be achieved during the manufacture of the upper material by sewing under tension, by certain layings of a warp knitted fabric, by close-meshed weaving or knitting, or also by additive manufacturing of the upper part of the running shoe.
In some embodiments, the second functional zone is pre-tensioned in the latitudinal direction and/or pre-stretched in the longitudinal direction. The second functional zone may for example further be delimited by a tension strap, particularly the first tension strap, or another pulling strap. The longitudinal pre-stretching allows the anterior-posterior movement of the foot and the latitudinal pre-tension fixes the foot to the instep and thus replaces essential functions of a lacing without significantly limiting the flexibility of the natural movement of the foot.
In further embodiments, the group of pulling straps includes a second pulling strap extending from the shoe sole on the medial side toward the first pulling strap and exerting a pulling force in the direction of the first pulling strap. The second pulling strap is typically directly connected to the first pulling strap. Preferably, the second pulling strap extends from the medial side obliquely toward the shoe tip in the direction of the first pulling strap.
In some embodiments, the second tension strap may be arranged such that it is positioned behind the hallux of the wearer in the direction of running in the worn state. Preferably, the second pulling strap extends tangential to the hallux. In particular, the hallux may be surrounded by the first and second pulling straps in the worn state.
In further embodiments, the first and second pulling straps define a third functional zone. Optionally, the third functional zone may have a substantially triangular shape formed by the first and second pulling straps, and the shoe sole. In this regard, the third functional zone may be elastically formed, thereby providing a comfortable fit for various hallux shapes and hallux sizes.
In some embodiments, the group of tension straps includes a first tension strap extending from the medial side of the shoe sole to the lateral side of the shoe sole and disposed in the midfoot area of the running shoe. In this regard, the first tension strap may extend over the instep of the wearer's foot in the worn state. Typically, the first tension strap extends in the running direction in front of the entry opening of the running shoe. Preferably, the first tension strap is arranged such that it lies on a LONE of the wearer's foot in the worn state. The first tension strap fixes the foot of the wearer and prevents an unwanted vertical movement of the foot relative to the running shoe.
Preferably, the first tension strap has a medial engagement point in the midfoot area. This can, for example, be arranged in the running direction starting from the heel edge at about 20 to 40%, preferably 30 to 35%, of the total length of the running shoe. Furthermore, the first tension strap can have a lateral engagement point in the midfoot area. This can be arranged, for example, in the running direction starting from the heel edge at about 20 to 40%, preferably 30 to 35%, of the total length of the running shoe.
In further embodiments, the first tension strap and the shoe sole define a fourth functional zone in the midfoot area and the heel area that is force neutral in all directions. This ensures that the function of the tension strap or straps is not affected by pre-tensioning or pre-stretching of the fourth functional zone.
The fourth functional zone can comprise the entire midfoot area and heel area. In particular, the fourth zone can be subdivided by further tension straps into sub-zones, which can typically all be designed to be force-neutral or can also be partially pre-tensioned and/or pre-stretched.
In some embodiments, the group of tension straps includes a second tension strap extending on the medial side in the heel area and rise vertically from the shoe sole at the heel edge to the first tension strap. In particular, the second tension strap may be directly connected to the first tension strap. For example, the second tension strap may be disposed only on the medial side of the running shoe and not on the lateral side. The second tension strap can rise continuously in the vertical direction or rise vertically only on a partial section and be arranged partially horizontally in the running direction. The second tension strap provides additional stabilization in the heel area. Preferably, the second tension strap is arranged in such a way that it lies on a LONE of the wearer's foot in the worn state.
In further embodiments, the group of tension straps comprises a third tension strap which extends on the lateral side in the heel area and extends vertically ascending from the running shoe sole at the heel edge to the first tension strap. In particular, the third tension strap may be directly connected to the first tension strap. Preferably, the third tension strap is arranged only on the lateral side of the running shoe and not on the medial side. The third tension strap can rise continuously in the vertical direction or rise vertically only on a partial section and be arranged partially horizontally in the running direction. The third tension strap provides additional stabilization in the heel area. Preferably, the third tension strap is arranged in such a way that it lies on a LONE of the wearer's foot in the worn state.
The second and third tension strap has the advantage that a medial or lateral twisting of the wearer's foot during running is prevented even further. This provides an additional increase in the stability of the foot in the running shoe.
In some embodiments, the group of tension straps includes a fourth tension strap that extends in the heel area starting from the medial side of the shoe sole over the heel edge to the lateral side of the shoe sole and has an inclination in the vertical direction. Preferably, the fourth tension strap extends at the heel edge to the entry opening of the running shoe. Preferably, the fourth tension strap is arranged such that it lies on a LONE of the wearer's foot in the worn state. The fourth tension strap efficiently prevents the wearer's foot from slipping over the periphery of the sole of the shoe during the running movement, for example during treading with the heel. The combination of the first and fourth tension straps has proven to be particularly preferred, as these can essentially completely enclose the wearer's foot and hold it firmly in place by the compression force exerted.
Preferably, the fourth tension strap has a medial engagement point in the heel area. This can be arranged, for example, in the running direction starting from the heel edge at about 20 to 30%, preferably 25 to 27%, of the total length of the running shoe. Furthermore, the fourth tension strap may have a lateral engagement point tin the heel area. This can be arranged, for example, in the running direction starting from the heel edge at about 20 to 30%, preferably 25 to 27%, of the total length of the running shoe.
In some embodiments, the first, second, third, and fourth tension straps define a fifth functional zone that is longitudinally and latitudinally pre-tensioned. The fifth functional zone is thus located in the region of the entry opening of the running shoe, and thus compresses the upper of the running shoe in the worn state in the region of the ankles of the foot, thereby enabling a better hold of the running shoe on the foot of the wearer. The fifth functional zone can be formed here, for example, as a subzone of the fourth functional zone.
In further embodiments, the at least one tension strap, or straps, and/or the at least one pulling strap, or straps, has a width of 0.5 to 4 cm. The person skilled in the art understands that the width of the tension strap and the pulling strap is dependent on the shoe size. The tension straps and/or the pulling straps may be arranged on the textile base material, peripherally surrounded by it and/or be part of the textile base material. In particular, it is possible for the width of a particular tension strap to vary.
In some embodiments, the upper comprises an auxetic transition region between the tension strap, or straps, and the textile base material and/or between the pulling strap, or straps, and the textile base material. The transition area can have a width of up to 2 cm, for example, preferably between 0.5 and 2 cm.
In further embodiments, the first, second, third and/or fourth functional zone is auxetic. Preferably, at least the first functional zone is auxetic, which prevents crumpling of the textile base material during the running movement and pressure points on the foot of the wearer resulting therefrom. This can increase the durability and resistance of the upper of the running shoe.
In further embodiments, the at least one tension strap and/or the at least one pulling strap is connected to the shoe sole. For example, it is possible that the at least one tension strap and/or the at least one pulling strap is connected to the sole of the shoe by a material bond, is sewn to the sole of the shoe, rests against the sole of the shoe, or is also at least partially surrounded by the sole of the shoe. Alternatively, the at least one tension strap and/or pulling strap can run above the shoe sole along a surface of the shoe sole. In such embodiments, the at least one tension strap and/or pull strap extend in the worn state below the foot of the wearer.
The first pulling strap 15 divides the forefoot area VB into a first functional zone 21 and a second functional zone 22. As shown in
Furthermore, the running shoe 1 shown in
| Number | Date | Country | Kind |
|---|---|---|---|
| 00866/19 | Jun 2019 | CH | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/EP2020/068246 | 6/29/2020 | WO | 00 |
