RELATED APPLICATION DATA This application is a U.S. Non-Provisional Application based on U.S. Provisional Patent Appln. No. 63/539,205 filed Sep. 19, 2023 and entitled “Footwear Structures Providing Adjustable Responsiveness and/or Energy Return.” U.S. Provisional Patent Appln. No. 63/539,205 is entirely incorporated herein by reference.
FIELD OF THE INVENTION The present technology relates to articles of footwear and/or footwear sole structures that provide adjustable responsiveness and/or energy return to a wearer's foot. Additional aspects of this technology relate to methods of modifying responsiveness and/or energy return in an article of footwear.
BACKGROUND Conventional articles of athletic footwear include two primary elements, an upper and a sole structure. The upper may provide a covering for the foot that securely receives and positions the foot with respect to the sole structure. In addition, the upper may have a configuration that protects the foot and provides ventilation, thereby cooling the foot and removing perspiration. The sole structure may be secured to a lower surface of the upper and generally is positioned between the foot and any contact surface. In addition to attenuating ground reaction forces and absorbing energy, the sole structure may provide traction and control potentially harmful foot motion, such as over pronation.
The upper forms a void on the interior of the footwear for receiving the foot. The void has the general shape of the foot, and access to the void is provided at an ankle opening. Accordingly, the upper extends over the instep and toe areas of the foot, along the medial and lateral sides of the foot, and around the heel area of the foot. A lacing system often is incorporated into the upper to allow users to selectively change the size of the ankle opening and to permit the user to modify certain dimensions of the upper, particularly girth, to accommodate feet with varying proportions. In addition, the upper may include a tongue that extends under the lacing system to enhance the comfort of the footwear (e.g., to modulate pressure applied to the foot by the laces). The upper also may include a heel counter to limit or control movement of the heel.
SUMMARY This Summary is provided to introduce some general concepts relating to this technology in a simplified form that are further described below in the Detailed Description. This Summary is not intended to identify key features or essential features of the invention.
Aspects of this technology relate to articles of footwear and/or footwear sole structures that provide adjustable responsiveness and/or energy return to a wearer's foot. Additional aspects of this technology relate to methods of modifying responsiveness and/or energy return properties of a sole structure and/or an article of footwear.
As some more specific examples, aspects of this technology relate to articles of footwear including a forefoot region, a heel region, and a midfoot region extending between and connecting the forefoot region and the heel region, the article of footwear comprising: (a) a base foot support component including an upper-facing surface and a ground-facing surface opposite the upper-facing surface, wherein the base foot support component (e.g., its upper-facing surface, its ground-facing surface, etc.) defines a passageway that extends from the forefoot region to the heel region and through the midfoot region of the article of footwear; (b) a forefoot securing system located in the forefoot region of the article of footwear (e.g., engaged with and/or integrally formed with one or more of the base foot support component, another sole component, a footwear upper component, etc.); (c) a heel securing system located in the heel region of the article of footwear (e.g., engaged with and/or integrally formed with one or more of the base foot support component, another sole component, a footwear upper component, etc.); and (d) a band including at least one elastic or stretchable portion or region, the band extending through the passageway and having a first end connected with the forefoot securing system and a second end connected with the heel securing system. The band may include features and/or may be attached with components that form portions of the forefoot securing system and/or the heel securing system. Application of different tensile forces to the band may be used to modify and control the responsiveness and/or energy return properties of the sole structure and/or article of footwear.
Additional aspects of this technology relate to methods of modifying responsiveness and/or energy return properties of a sole structure and/or an article of footwear. Such methods may include: (a) placing a band including at least one elastic or stretchable portion or region in a passageway defined in a base foot support component (e.g., at an upper-facing surface and/or a ground-facing surface of the base foot support component), wherein the band is placed such that a first end of the band is located at a forefoot region of the base foot support component and a second end of the band is located at a heel region of the base foot support component; (b) securing the first end of the band with a forefoot securing system; (c) securing the second end of the band with a heel securing system, wherein the securing steps place the second end of the band in a first securing position and place the band under a first tensile force; and (d) moving the second end of the band from the first securing position to a second securing position to thereby place the band under a second tensile force that differs from the first tensile force. Changing the tensile force results in changes to the responsiveness and/or energy return properties of the sole structure and/or article of footwear.
BRIEF DESCRIPTION OF THE DRAWINGS The foregoing Summary, as well as the following Detailed Description, will be better understood when considered in conjunction with the accompanying drawings in which like reference numerals refer to the same or similar elements in all of the various views in which that reference number appears.
FIGS. 1A-1F provide various views of a foot support component and article of footwear in accordance with some examples of this technology;
FIGS. 2A-2H provide various views of a base foot support component used in foot support components and articles of footwear in accordance with some examples of this technology;
FIGS. 3A-3C provide various views of a band used in foot support components and articles of footwear in accordance with some examples of this technology;
FIGS. 4A-4C provide views showing features of assembling foot support components and articles of footwear in accordance with some examples of this technology;
FIGS. 5A and 5B provide various views of a handle member used in foot support components and articles of footwear in accordance with some examples of this technology;
FIGS. 6A and 6B illustrate a connector and its connection with a handle for foot support components and articles of footwear in accordance with some examples of this technology;
FIG. 7 provides a view showing additional features of assembling foot support components and articles of footwear in accordance with some examples of this technology;
FIGS. 8A-8E provide various views of an exterior sole component used in foot support components and articles of footwear in accordance with some examples of this technology;
FIG. 9 provides a perspective view of the assembled parts shown in FIGS. 2A-8E;
FIG. 10 provides a view illustrating steps in changing a tensile force applied to band 300;
FIGS. 11A and 11B illustrate an alternative heel securing system that may be used in foot support components and articles of footwear in accordance with some examples of this technology;
FIG. 12 illustrates an alternative exterior sole component that may be used in foot support components and articles of footwear in accordance with some examples of this technology;
FIG. 13 illustrates an alternative band structure that may be used in foot support components and articles of footwear in accordance with some examples of this technology;
FIGS. 14A and 14B illustrate another alternative band structure and an alternative heel securing system that may be used in foot support components and articles of footwear in accordance with some examples of this technology;
FIGS. 15A-15B illustrate features of an alternative base foot support component that may be used in foot support components and articles of footwear in accordance with some examples of this technology;
FIG. 16 illustrates features the bottom of the base foot support component shown in FIG. 15A; and
FIG. 17 illustrates other alternative features that may be provided in foot support components and articles of footwear in accordance with some examples of this technology.
DETAILED DESCRIPTION In the following description of various examples of footwear structures and components according to the present technology, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration various example structures and environments in which aspects of the present technology may be practiced. It is to be understood that other structures and environments may be utilized and that structural and functional modifications may be made to the specifically described structures and methods without departing from the scope of the present disclosure.
“Footwear,” as that term is used herein, means any type of wearing apparel for the feet, and this term includes, but is not limited to: all types of shoes, boots, sneakers, sandals, thongs, flip-flops, mules, scuffs, slippers, sport-specific shoes (such as golf shoes, tennis shoes, baseball cleats, soccer or football cleats, ski boots, basketball shoes, cross training shoes, dance shoes, etc.), and the like.
Various structures and parameters of footwear uppers, sole structures, and/or articles of footwear are described herein based on a “longitudinal length” parameter L. Note FIG. 1A. The longitudinal length L can be found with the article of footwear (or sole structure or other component) oriented on a horizontal support surface on its ground-facing surface in an unloaded condition (e.g., with no weight applied to it other than weight of other components of the article of footwear, sole structure, or other component). Once so oriented, parallel vertical planes VP that are perpendicular to the horizontal support surface are oriented to contact the rearmost heel (RH) location(s) and the forwardmost toe (FT) location(s) of the article of footwear, upper, sole structure, or another component of interest. The parallel vertical planes VP should be oriented facing one another, e.g., extending into and out of the page of FIG. 1A, and as far away from one another as possible while still in contact with the rearmost heel RH and forwardmost toe FT locations. The direct distance between these vertical planes VPs corresponds to the longitudinal length L of the article of footwear, upper, sole structure, or other component of interest. The locations of various footwear features and/or components are described in this specification based on their respective locations along the longitudinal length L as measured forward from the rear heel vertical plane VP. The rearmost heel (RH) location(s) is (are) located at position 0L and the forwardmost toe (FT) location(s) is (are) located at position 1L along the longitudinal length L. Intermediate locations along the longitudinal length L are referred to by fractional locations (e.g., 0.25L) along the longitudinal length L measured forward from the rear heel vertical plane VP. The term “parallel planes” as used herein are planes oriented parallel to the RT and FH vertical planes VP. These parallel planes may intersect the longitudinal length L or longitudinal direction somewhere between P=0L and P=1.0L. Note FIG. 1A, including example parallel plane location designators at 0.33L and 0.67L.
The term “rearward” as used herein means at or toward the heel region of the article of footwear (or component thereof), and the term “forward” as used herein means at or toward a forefoot or forward toe region of the article of footwear (or component thereof). Unless otherwise defined, the terms “heel area” or “heel region” refer to a region bounded by parallel planes at 0L and 0.33L; the terms “midfoot area,” “midfoot region,” or “arch region” refer to a region bounded by parallel planes at 0.33L and 0.67L; and the terms “forefoot area” or “forefoot region” refer to a region bounded by parallel planes at 0.67L and 1.0L. See FIG. 1A. Also, the term “lateral” means the “little toe” side or outside area of an article of footwear or component thereof (e.g., an upper, a sole structure, etc.), and the term “medial” means the “big toe” side or inside area of an article of footwear or component thereof (e.g., an upper, a sole structure, etc.).
This application and/or its claims may use the terms, e.g., “first,” “second,” “third,” and the like, to identify certain components and/or features relating to this technology. These terms are used merely for convenience, e.g., to assist in maintaining a distinction between components and/or features of a specific structure. Use of these terms should not be construed as requiring a specific order or arrangement of the components and/or features being discussed. Also, use of these specific terms in the specification for a specific structure does not require that the same term be used in the claims to refer to the same structure (e.g., a component or feature referred to as the “third” in the specification may correspond to any numerical adjective used for that component or feature in the claims).
Given the general description of features, aspects, structures, processes, and arrangements according to certain examples of this technology provided above, a more detailed description of specific example foot support systems, sole structures, articles of footwear, and methods in accordance with this technology follows. Where the same reference number appears in multiple figures, the same or similar part is being referenced, and at least some of the overlapping description of that part may be omitted.
FIGS. 1A-1F and 9 provide various views of a foot support component 100 in accordance with some examples of this technology. More specifically: (a) FIG. 1A provides a medial side view of the foot support component 100, (b) FIG. 1B provides a lateral side view, (c) FIG. 1C provides a top view, (d) FIG. 1D provides a bottom view, (e) FIG. 1E provides a rear view, (f) FIG. 1F provides an exploded view showing individual parts of this example foot support component 100, and (g) FIG. 9 provides a rear, medial, top perspective view of the assembled foot support component 100. Accordingly, the combined parts of the foot support component 100 are described below in conjunction with FIGS. 1A-1F and 9, and then the individual parts of the foot support component 100, their interconnections, and their assembly will be described in more detail with additional reference to FIGS. 2A-9. While FIGS. 1A-9 show a foot support component 100 for a wearer's right foot, those skilled in the art given benefit of this disclosure will recognize that a foot support component 100 for the left foot may constitute a mirror image of the structures shown in FIGS. 1A-9 (and the other figures).
This example foot support component 100 may constitute a sole structure for an article of footwear or at least a portion of a sole structure. The foot support component 100 also may engage a footwear upper 102 (and optionally other parts, such as other sole structure parts and/or other footwear parts) to thereby form an overall article of footwear 180 product. A portion of a footwear upper 102 is shown in FIG. 1A. The article of footwear 180 includes a forefoot region (between parallel planes at P=0.67L and 1L), a heel region (between parallel planes at P=0L and 0.33L), and a midfoot region extending between and connecting the forefoot region and the heel region (between parallel planes at P=0.33L and 0.67L). The upper 102 may have any desired construction, number of parts, features, or the like, without departing from this technology, including conventional constructions, parts, features, etc. as are known and used in the footwear art Additionally, the foot support component 100 may engage with the upper 102 in any desired manner, including in conventional manners as are known and used in the footwear arts (e.g., by adhesives, by mechanical connectors, by stitching, etc.). Additionally or alternatively, in at least some examples of this technology, the foot support component 100 may form at least a portion of the footwear upper 102 (e.g., such as at least a portion of a heel-containing portion or heel counter of a footwear upper 102).
As shown in FIG. 1F (as well as FIGS. 1A-1E and 9), this example foot support component 100 includes five main parts: (a) a base foot support component 200 (see also FIGS. 2A-2H), (b) a band 300 having at least one elastic or stretchable portion or region (and optionally made completely from an elastic material or a stretchable material) (see also FIGS. 3A-3C), (c) a handle 500 (see also FIGS. 5A and 5B), (d) a connector 600, e.g., for connecting the handle 500 to the band 300 and/or engaging a securing system (see also FIG. 6), and (e) an exterior sole component 800 (see also FIGS. 8A-8E). Other parts and/or combinations of parts also may be used. For example, exterior sole component 800 could be omitted, e.g., if base foot support component 200 is configured to directly engage the ground in use. As another example, handle 500 could be omitted, if desired. As yet another example, different structures from the combination of handle 500 and connector 600 may be used to secure the rear end of band 300. These and additional variations are described in more detail below, e.g., in conjunction with FIGS. 11A-17.
FIGS. 2A-2H show various views of this example base foot support component 200. More specifically: (a) FIG. 2A provides a medial side view of the base foot support component 200; (b) FIG. 2B provides a lateral side view; (c) FIG. 2C provides a top view; (d) FIG. 2D provides a bottom view; (e) FIG. 2E provides a rear, lateral, bottom perspective view; (f) FIG. 2F provides a partial rear, top perspective view; and (g) FIGS. 2G and 2H provide additional perspective views. The base foot support component 200 may be made from any desired material, such as a resilient plastic material. As some more specific examples, the base foot support component 200 may be made from a rigid material that is capable of bending under an applied force (such as the force applied due to the weight of a wearer when landing a step or jump) and then springing back to or toward its original shape and configuration when the applied force is sufficiently relaxed or reduced (such as when the wearer begins to lift their foot). In this manner, the base foot support component 200 can return energy to the wearer's foot as the foot is lifted (and thus provide “responsiveness” or feel “responsive”). Examples of suitable materials include thermoplastic polyurethanes, thermosetting materials, thermoplastic elastomers (such as polyether block amides), other plastics, etc.
The base foot support component 200 includes an upper-facing surface 200U and a ground-facing surface 200G opposite the upper-facing surface 200U. The base foot support component 200 (e.g., at its ground-facing surface 200G) defines a passageway 210. In this illustrated example, the passageway 210 extends from the forefoot region to the heel region of the base foot support component 200 (and/or article of footwear 180) and through the midfoot region. The base foot support component 200 of this example extends to provide a support surface (e.g., upper-facing surface 200U) for supporting all (or substantially all) of the plantar surface of a wearer's foot. The structure defining the passageway 210 may form a central ridge that extends: (i) downward from other portions of the ground-facing surface 200G and (ii) from the forefoot region to the heel region.
The passageway 210 includes two ends. A first end opens into a recess 212 provided on the upper-facing surface 200U at the forefoot region of the base foot support component 200 (and/or article of footwear 180). This recess 212 forms a receptacle or area for housing at least a portion of a forefoot securing system as will be described in more detail below. The second end opens at an insertion opening 214 for receiving the band 300. As shown in FIGS. 2A and 2B (and others), the passageway 210 of this example generally follows the curved contour of the upper-facing surface 200U (and the ground-facing surface 200G) through the midfoot region of the base foot support component 200.
FIG. 2C (and others) show that the upper-facing surface 200U of this example base foot support component 200 includes a plurality of openings 202O defined through it. While other sizes, shapes, and/or spacings are possible, in this illustrated example, the openings 202O comprise elongated slots having their longest dimension extending in the medial side-to-lateral side direction of the base foot support component 200. At least some of these openings 202O open into the interior of the passageway 210. In this specifically illustrated example, the openings 202O are provided throughout the forefoot, midfoot, and heel regions of the base foot support component 200. In addition to reducing the weight, the openings 202O may be provided to improve and/or control flexion of the base foot support component 200. Any desired number, size, shape, and/or spacing of the openings 202O may be provided in accordance with aspects of this technology.
Additionally or alternatively, as shown in FIG. 2D (and others), the ground-facing surface 200G of this example base foot support component 200 also may include a plurality of openings 204O defined through it. While other sizes, shapes, and/or spacings are possible, in this illustrated example, the openings 204O comprise elongated slots having their longest dimension extending in the medial side-to-lateral side direction of the base foot support component 200. At least some of these openings 204O open into the interior of the passageway 210 and are located through the central ridge that forms the exterior surface of the passageway 210. In addition to reducing the weight, the openings 204O may be provided to improve and/or control flexion of the base foot support component 200. In this specifically illustrated example, most or all of the openings 204O from the ground-facing surface 200G are provided in the forefoot region of the base foot support component 200. Forefoot based openings 204O may be located to support flexion of the wearer's foot, e.g., during a toe-off phase of a step cycle. Any desired number, size, shape, and/or spacing of the openings 204O may be provided in accordance with aspects of this technology.
FIGS. 2A-2H (and others) further show that this example base foot support component 200 includes cleat supports 230. The cleat supports 230 include projections 230P extending outward (e.g., downward) from the ground-facing surface 200G. On the upper-facing surface 200U, the cleat supports 230 comprise recesses 230R that extend into and define a hollowed out interior (at least partially hollowed out interior) of the corresponding projection 230P. The projections 230P of the cleat supports 230 fit into corresponding recesses defined in the upper-facing surface of the exterior sole component 800 in this example (as will be described in more detail below). Alternatively, in some examples of this technology, some or all of the projections 230P could be constructed to act as cleats (or other traction-enhancing elements) and directly engage the ground in use (e.g., in foot support components 100 that do not include an exterior sole component 800 and/or in foot support components that include an exterior sole component that does not cover or contain all of the projections 230P).
FIGS. 2C, 2G, and 2H (and others) further show that this example base foot support component 200 includes a portion of a forefoot securing system that holds one end (the forward end) of the band 300 in place. In this illustrated example, the upper-facing surface 200U of the base foot support component 200 includes a retaining post 240. This retaining post 240 is located within the recess 212 provided at the first end of passageway 210. The recess 212 and retaining post 240 are sized and shaped such that: (a) the retaining post 240 extends upward from (or through) a bottom surface of recess 212 and (b) a top surface of the retaining post 240 is positioned substantially level with or smoothly contoured with the nearby upper-facing surface 200U of the base foot support component 200 (e.g., so that the wearer will not substantially feel the retaining post 240 beneath their foot). The recess 212 may surround the retaining post 240. The retaining post 240 may include a somewhat larger exposed free end surface 240S than the cylinder 240C extending upward from the bottom surface of the recess 212, e.g., a larger width or diameter, to help more securely hold the band 300 around the retaining post 240. See FIGS. 2G and 2H.
As shown in FIG. 2C, the retaining post 240 is located in the forefoot region of the base foot support component 200 (and/or article of footwear 180 including it). In fact, in this illustrated example, the retaining post 240 is located at the forward toe end of the base foot support component 200. While other options are possible, in at least some examples of this technology, the retaining post 240 (and/or other structure forming the forefoot securing system) will be located forward of a parallel plane located at P=0.75L, and in some examples, located forward of a parallel plane located at P=0.8L, forward of a parallel plane located at P=0.85L, and/or even forward of a parallel plane located at P=0.9L. FIG. 2C shows the rearward edge of the retaining post 240 at about P=0.93L. The opening from the passageway 210 into the recess 212 also may be located within any of these ranges. The longitudinal length L referred to in these ranges may correspond to the longitudinal length L of the base foot support component 200, the overall foot support component 100, a sole structure containing the base foot support component 200, and/or the article of footwear 180 containing the base foot support component 200.
FIGS. 2A-2H (and others) further show that this example base foot support component 200 includes a portion of a heel securing system that holds one end (the rearward end) of the band 300 in place. The heel securing system may include one or more retaining elements provided at a rear heel location of the base foot support component 200. In this illustrated example, the rear heel wall 200W of the base foot support component 200 includes a portion of an adjustable heel securing system (i.e., a heel securing system that allows the rearward end of the band 300 to be held in a plurality of different securing positions and/or that allows the band 300 to be held under different tensile forces). This adjustability allows one to change or control the tension applied to the band 300, as will be explained in more detail below.
While other structures are possible, this portion of the heel securing system includes a plurality of securing hooks 250H1, 250H2, and 250H3 (provided as pairs of securing hooks). While three sets (pair) of securing hooks 250H1, 250H2, and 250H3 are shown in FIGS. 2A-2H, any number, spacing, and/or arrangement of securing hooks may be provided in different examples of this technology. The securing hooks 250H1, 250H2, and 250H3 extend outward and rearward from the rear heel wall 200W and are vertically spaced from one another along the center of the rear heel wall 200W. The securing hooks 250H1, 250H2, and 250H3 may have any desired size, shape, spacing, etc. In this illustrated example, the securing hooks 250H1, 250H2, and 250H3 are provided in pairs configured to hold opposite ends of connector 600. Recesses in the bottoms of the securing hooks 250H1, 250H2, and 250H3 form retaining surfaces that engage the connector 600 and help hold it in place, as will be described in more detail below.
As shown in FIGS. 2A-2H, the heel securing system (e.g., one or more of the sets of securing hooks 250H1, 250H2, and 250H3) is located in the heel region of the base foot support component 200 (and/or article of footwear 180 including it). In fact, in this illustrated example, the heel securing system (e.g., one or more of the sets of securing hooks 250H1, 250H2, and 250H3) is located at the rearmost heel end of the base foot support component 200. While other options are possible, in at least some examples of this technology, the heel securing system (e.g., one or more of the sets of securing hooks 250H1, 250H2, and 250H3, and/or other structure forming the heel securing system) will be located rearward of a parallel plane located at P=0.15L, and in some examples, located rearward of a parallel plane located at P=0.1L, and/or even rearward of a parallel plane located at P=0.05L. The insertion opening 214 into the passageway 210 also may be located within any of these ranges. The longitudinal length L referred to in these ranges may correspond to the longitudinal length L of the base foot support component 200, the overall foot support component 100, a sole structure containing the base foot support component 200, and/or the article of footwear 180 containing the base foot support component 200.
FIGS. 2A-2H further show that this base foot support component 200 includes a raised lateral heel wall 260L and a raised medial heel wall 260M. In fact, the rear heel wall 200W extends around continuously to form the lateral heel wall 260L and the medial heel wall 260M. In at least some examples of this technology, the rear heel wall 200W, the lateral heel wall 260L, and the medial heel wall 260M may form or function as at least a portion of a heel counter structure for the article of footwear 180. One or more openings may be defined through the rear heel wall 200W, the lateral heel wall 260L, and/or the medial heel wall 260M of any desired size, shape, and/or arrangement, e.g., to reduce weight, improve breathability, and/or control the flex properties of the heel region of the base foot support component 200.
FIGS. 3A-3C provide a medial side view, a top view, and a rear, medial, top perspective view, respectively, of a band 300 that may be used in some examples of this technology. The band 300 is configured to extend through the passageway 210 defined in the base foot support component 200. The band 300 is made, at least in part, from a somewhat stretchable plastic material, such as a thermoplastic elastomer material. The band 300 is flexible and may easily bend and change its shape under applied force, but if stretched, it will return to or toward its original size and shape when the applied force is removed or sufficiently relaxed.
In some examples of this technology, at least 50% of the length of the band 300 (e.g., a portion within the passageway 210) will have a thickness dimension T (a direct distance in the top-to-bottom direction of the article of footwear 180 or the foot support component 100) of less than 5 mm (and in some examples, less than 4 mm, less than 3 mm, or even less than 2 mm). See FIG. 3A. At least 60%, at least 70%, at least 80%, or even at least 90% of the length of the band 300 (including the portion within the passageway 210) may have a thickness dimension T within any of these ranges. Additionally or alternatively, in some examples of this technology, at least 50% of the length of the band 300 (e.g., a portion within the passageway 210) will have a width dimension W (a direct distance across the band (e.g., in the side-to-side direction of the article of footwear 180 or the foot support component 100) of at least 5 mm (and in some examples, at least 8 mm, at least 10 mm, at least 12 mm, at least 15 mm, or even at least 20 mm). See FIG. 3B. At least 60%, at least 70%, at least 80%, or even at least 90% of the length of the band 300 (including the portion within the passageway 210) may have a width dimension W within any of these ranges. The width dimension W may be at least 5 times greater than the thickness dimension T, and in some examples, at least 8 times greater, or even at least 10 times greater. The band 300's length (from its heel end 300H to its forefoot end 300F) may be at least 5 times greater than the width dimension W, and in some examples, at least 8 times greater, at least 10 times greater, or even at least 15 times greater.
As noted above, and with additional reference to FIGS. 4A-4C, the band 300 is configured to extend through the passageway 210 of the base foot support component 200. This may be accomplished, for example, by inserting the forefoot end 300F of the band 300 into the insertion opening 214 for the passageway 210 located at the rear heel region of the base foot support component 200 and threading the band 300 through the passageway 210 until the forefoot end 300F is exposed in the recess 212. FIGS. 4A and 4B show that portions of the band 300 are exposed in the openings 202O provided at the upper-facing surface 200U of the base foot support component 200 and in the openings 204O provided at the ground-facing surface 200G of the base foot support component 200.
The forefoot end 300F of this example band 300 includes a post-engaging component, which constitutes a through hole opening 310 in this example band 300 structure. The through hole opening 310 is stretched over the enlarged free end surface 240S of the retaining post 240 and engages the cylinder 240C of the retaining post 240 that extends upward from the bottom surface of the recess 212. Thus, the forefoot end 300F of the band 300 in this example fits into (and at least partially fills) the recess 212 around the retaining post 240. Through hole opening 310 of this example extends through a thickness direction of the band 300 structure. If necessary or desired, the forefoot end 300F of the band 300 may be reinforced (e.g., made thicker, include a tear resistant material or coating, etc.) to prevent tearing, etc.
The heel end 300H of this example band 300 forms an exposed portion of the band 300 (extending outward from insertion opening 214) that allows a wearer to interact with the band 300 (e.g., to change the tensile force applied to the band 300). As shown in FIGS. 3A and 3C, the heel end 300H of this example band 300 includes at least one through hole opening 312. Through hole opening 312 of this example extends through a width direction of the band 300 structure. This through hole opening 312 allows the heel end 300H of the band 300 to be engaged with a securing component (e.g., handle 500 and connector 600) as part of the heel securing system, as will be described in more detail below in conjunction with FIGS. 5A-7. The band 300 of this example morphs from a relatively flat structure in the forefoot and midfoot regions to a more rectangular cubic shape at the heel region. If necessary or desired, the heel end 300H of the band 300 may be reinforced (e.g., made thicker, include a tear resistant material or coating, etc.) to prevent tearing, etc.
FIGS. 5A and 5B illustrate a medial side view and a perspective view of a handle 500 that may form part of the heel securing system in accordance with at least some examples of this technology. The lateral side view of the handle 500 may constitute a mirror image of the medial side view (e.g., and can be seen, for example, in FIGS. 1B and 6B). The handle 500 may be made from any desired or suitable material, such as plastic materials (e.g., TPUs, etc.), metal materials, etc.
The handle 500 of this example, includes a grasping portion 510 at one end and a securing portion 520 at its other end. The grasping portion 510 extends upward and outward (e.g., away from the rear heel wall 200W of the base foot support component 200) so as to be readily available to the wearer in use. The securing portion 520 of this example includes: (i) a medial through hole opening that opens into and defines a medial channel 520M that extends through the medial surface 500M of the handle 500, and (ii) a lateral through hole opening that opens into and defines a lateral channel 520L that extends through the lateral surface 500L of the handle 500 (see FIG. 6B). The specific handle 500 example of FIGS. 5A and 5B includes a gap 520G between the medial channel 520M and the lateral channel 520L (this gap 520G will receive a portion of the band 300, as will be described in more detail below in conjunction with FIG. 7). Thus, the central portion of the handle 500 body defines a central open space in the gap 520G between the side surfaces 500L and 500M such that each side surface 500L, 500M defines a short channel 520L, 520M, and these separated short channels 520L, 520M are axially aligned with one another.
The channels 520L, 520M provide openings for receiving a connector 600, e.g., of the type shown in FIG. 6A. The connector 600 forms a portion of a securing component for the heel securing system. The connector 600 of this example may be a metal (e.g., aluminum) or plastic rod or other suitable material having any desired cross-sectional shape. This example connector 600 has an axial length that is somewhat longer than the side-to-side dimension of the handle 500 (from the lateral side surface 500L to the medial side surface 500M), e.g., so that the ends 600L and 600M of the connector 600 will be exposed outside the lateral channel 520L and the medial channel 520M, respectively, when the connector 600 is inserted into the handle 500 and across the gap 520G. See FIG. 6B.
FIG. 7 provides additional details relating to the assembly procedure and connection of the securing component (including connector 600) with the heel end 300H of the band 300 to form the heel securing system of this example. First, as described above in conjunction with FIGS. 4A-4C, the forefoot end 300F of the band 300 is inserted into the insertion opening 214 for the passageway 210 located at the rear heel region of the base foot support component 200 and threaded through the passageway 210 until the forefoot end 300F is exposed in the recess 212. At that point, the forefoot end 300F can be secured around retaining post 240 as described above. This action leaves the heel end 300H of the band 300 exposed at the rear heel area of the base foot support component 200.
As part of the assembly procedure, either before or after the forefoot end 300F of the band 300 is inserted into the passageway 210 and/or engaged with the securing or retaining post 240 (or other forefoot securing action takes place), the handle 500 is connected with the heel end 300H of the band 300. As shown in FIG. 7, this may be accomplished by placing the handle 500 such that its channels 520L, 520M axially align with the through hole opening 312 provided at the heel end 300H of the band 300. See arrow 700 in FIG. 7. This action places the heel end 300H of the band 300 (and the band 300's through hole opening 312) within the gap 520G. Then, the connector 600 is inserted through the channels 520L and 520M and through the through hole opening 312 until its free ends 600M, 600L are exposed, as shown at the bottom of FIG. 7. See arrow 702. Then, as shown by arrow 704, the handle 500 can be manipulated to engage the connector 600 with another portion of the heel securing system (e.g., to place the free ends 600M, 600L of the connector 600 within one of the sets of securing hooks 250H1, 250H2, and 250H3 (in securing hooks 250H1 in the example of FIG. 7)). As further shown in FIG. 7, the ends 600M, 600L of the connector 600 may be received in recesses 250R provided in the surfaces of the securing hooks 250H1, 250H2, and 250H3. These recesses 250R help prevent the connector 600 from sliding out of the securing hooks 250H1, 250H2, and 250H3 in the forward and rearward directions (thereby helping secure the connector 600 in place).
As noted above, in some examples of this technology, the base foot support component 200 may constitute a component configured to directly engage the ground in use. In other examples of this technology, however, the base foot support component 200 may be at least partially contained and/or covered by an exterior sole component 800, e.g., of the types shown in FIGS. 8A-8E. FIG. 8A provides a medial side view of this example exterior sole component 800; FIG. 8B provides a lateral side view; FIG. 8C provides a top view; FIG. 8D provides a bottom view; and FIG. 8E provides a perspective view. The exterior sole component 800, when present, may provide ground-engaging traction elements (e.g., cleats 802) and may at least partially cover the ground-facing surface 200G of the base foot support component 200. While FIGS. 8A-8E show an exterior sole component 800 well configured for a soccer type shoe, any desired types and configuration of ground-engaging traction elements, for any desired uses, may be provided in other examples of this technology. The exterior sole component 800 may be made from any desired material, including materials conventionally known and used in the footwear arts (e.g., for outsole components).
As shown in FIGS. 8C and 8E, in this illustrated example, the upper-facing surface 800U of the exterior sole component 800 includes a plurality of receptacles 804 that extend into (and partially hollow out the interior of) the corresponding cleat 802. These receptacles 804 are sized, shaped, and configured to receive corresponding projections 230P defined in the ground-facing surface 200G of the base foot support component 200. In this manner, the projections 230P extend into the interior chambers defined by the receptacles 804 within the plurality of cleats 802. Interaction between the projections 230P and receptacles 804 may help hold the base foot support component 200 and exterior sole component 800 in place with respect to one another. Additionally or alternatively, the base foot support component 200 and exterior sole component 800 may be releasably fixed together or permanently fixed together, e.g., by one or more mechanical fasteners (e.g., releasable or removable mechanical fasteners, such as bolts/nuts, screws, etc., or permanent mechanical fasteners, such as rivets, crimped elements, etc.); by adhesives; or in other desired manners.
FIGS. 8A-8E further show that the exterior sole component 800 includes a central ridge 810 that is sized, shaped, and configured to receive the structure(s) defining the passageway 210 of the base foot support component 200. The ridge 810 of this example constitutes a recessed structure at the upper-facing surface 800U and an outwardly extending structure at the ground-facing surface 800G.
FIGS. 8C-8D (as well as FIGS. 1A-1E and 9) further show that this example exterior sole component 800 defines a rear gap 820. The rear gap 820 of this example separates the lateral heel region 800L of the exterior sole component 800 from the medial heel region 800M. In addition to providing longitudinal flexibility, the rear gap 820 exposes the rear portion of the base foot support component 200 and provides space to allow access to the rear heel securing system, as shown in FIGS. 1A-1E and 9.
The rear gap 820 may form a groove structure (e.g., a tapered groove shown in FIGS. 8C and 8B) that extends along the bottom surface of the exterior sole component 800 in a forward direction. That groove may extend forward to a closed end 820E, which may be located within the ridge 810. The closed end 820E may be located in the heel region or midfoot region of the exterior sole component 800, foot support component 100, sole structure, and/or article of footwear 180. As some more specific examples, the closed end 820E of this example may be located between parallel places located at 0.2L and 0.5L (and in some examples, between parallel planes located at 0.25L and 0.45L). The rear gap 820 and its forwardly extending groove may expose a portion of the ground-facing surface 200G of the base foot support component 200 (e.g., in the heel region), such as a portion of that structure defining the passageway 210. See also FIG. 1D.
FIGS. 8A-8E further show that this exterior sole component 800 includes a raised lateral heel wall 860L and a raised medial heel wall 860M located on opposite sides of the gap 820. In at least some examples of this technology, the lateral heel wall 860L and the medial heel wall 860M may form or function as at least a portion of a heel counter structure for the article of footwear 180. One or more openings may be defined through the lateral heel wall 860L and/or the medial heel wall 860M of any desired size, shape, and/or arrangement, e.g., to reduce weight, improve breathability, and/or control the flex properties of the exterior sole component 800. The raised lateral heel wall 860L and/or the raised medial heel wall 860M may be sized, shaped, and configured so as to at least partially cover and/or contain the raised lateral heel wall 260L and/or the raised medial heel wall 260M of the base foot support component 200. When present, the one or more openings defined through the lateral heel wall 860L and/or the medial heel wall 860M may at least partially align with the one or more openings (if any) provided through the lateral heel wall 260L and/or the medial heel wall 260M of the base foot support component 200.
FIG. 10 (together with FIGS. 1A-9 discussed above) illustrates features of a method of modifying responsiveness and/or energy return properties of a sole structure and/or an article of footwear. In this method, a band 300 (as described above) is placed in a passageway 210 defined in a base foot support component 200, e.g., in the manners described above in conjunction with FIGS. 4A-4C and 7. The band 300 is placed such that its forefoot end 300F is located at a forefoot region of the base foot support component 200 and its heel end 300H is located at a heel region of the base foot support component 200. The forefoot end 300F of the band 300 is secured with a forefoot securing system (e.g., by securing through hole opening 310 around retaining post 240 in the specific structures described above). The heel end 300H of the band 300 is secured with a heel securing system (e.g., by securing connector 600 with handle 500, band 300, and one of the retaining elements 250H1, 250H2, or 250H3 provided on the rear heel wall 200W of the base foot support component 200). The left side of FIG. 10 shows connector 600 engaged with a first pair of retaining hooks 250H1. These steps of securing the band 300 with the forefoot securing system and the heel securing system: (i) place the heel end 300H of the band 300 in a first securing position (e.g., with hooks 250H1) and (ii) place the band 300 under a first tensile force (e.g., F1, which may be 0 or greater).
As a wearer lands a step or jump, the foot support component 100 will flatten compared to its unloaded condition. As the wearer begins lifting their foot (e.g., for a new step or jump), the resilient properties of the band 300, the base foot support component 200, and/or the exterior sole component 800 will cause the foot support component 100 to “snap back” to or toward its unloaded configuration. This “snap back” returns energy to the wearer's foot and provides a “responsive” feel. The “snap back” force of the foot support component 100 described above in conjunction with FIGS. 1A-9 may be proportional to the tensile force applied to the components by the band 300.
To change the responsiveness and/or energy return properties of the sole structure or article of footwear of this example, the heel end 300H of the band 300 is moved from the first securing position (e.g., with hooks 250H1 on the left side of FIG. 10) to a second securing position (e.g., with hooks 250H2 or 250H3, as shown on the right side of FIG. 10). This action stretches the band 300 and places the band 300 under a higher tensile force. The higher tensile force will apply a greater return energy force to the wearer's foot as the wearer lifts their foot for the next step or jump action. Thus, the change from the left side of FIG. 10 to the right side of FIG. 10 will increase the responsiveness and/or energy return properties of this example foot support component 100 and/or article of footwear 180. Similarly, the change from the right side of FIG. 10 to the left side of FIG. 10 (moving connector 600 from retaining hooks 250H3 to retaining hooks 250H1) will decrease the tensile force applied by the band 300 and thus decrease the responsiveness and/or energy return properties of this example foot support component 100 and/or article of footwear 180.
FIGS. 11A-11B illustrate an alternative structure for a portion of the heel securing system. Where the same reference numbers are used in FIGS. 11A and 11B as used in other figures, the same or similar part is being referenced (with any alternatives or options described above), and much of the overlapping description may be omitted. In the example of FIGS. 11A-11B, the separate handle 500 is omitted and the connector 600 extends only through the through hole opening 312 provided at the heel end 300H of the band 300. The wearer can change the tensile force applied to the band 300 by directly grasping the connector 600 and/or the free end 300E of the band 300 and moving it from one securing location (e.g., 250H1) to another securing location (e.g., 250H2 or 250H3). In this manner, the free end 300E of the band 300 may function as the handle (so that the handle is integrally formed as part of the band 300).
FIG. 12 illustrates a top view of another example exterior sole component 850 that may be used in accordance with some examples of this technology. Where the same reference numbers are used in FIG. 12 as used in other figures, the same or similar part is being referenced (with any alternatives or options described above), and much of the overlapping description may be omitted. As compared to the exterior sole component 800 shown in FIGS. 8A-8E, this exterior sole component 850 eliminates the central ridge 810 and instead allows the rear gap 820 between the raised lateral heel wall 860L and the raised medial heel wall 860M to form a groove 820G that extends continuously forward to a forward toe region of the exterior sole component 850. In this manner, the structure defining the passageway 210 of the base foot support component 200 may be exposed at the ground-facing surface 800G of the exterior sole component 850 over all (or substantially all) of its length (e.g., from the heel securing system to the forefoot securing system).
In the example of FIG. 12, the groove 820G constitutes a longitudinally extending groove that separates a lateral side 850L of the exterior sole component 850 from a medial side 850M of the exterior sole component 850. As mentioned above, a ground-facing surface 200G of the base foot support component 200 may be exposed in this longitudinally extending groove 820G. A forward toe connecting portion 850T connects the lateral side 850L and the medial side 850M. In at least some examples of this technology, this forward toe connecting portion 850T may constitute the only part of the exterior sole component 850 connecting the lateral side 850L and the medial side 850M. Additionally or alternatively, in some examples of this technology, this forward toe connecting portion 850T may extend less than 20% of a longitudinal length of the exterior sole component 850 (and in sole examples, less than 15%, less than 10%, or even less than 5% of the longitudinal length of the exterior sole component 850). Thus, the longitudinal groove 820G of this example may extend at least 80% (and in some examples, at least 85%, at least 90%, or even at least 95%) of the longitudinal length of the exterior sole component 850. This feature may allow the exterior sole component 850 to be made from a hard and/or strong material (to function well as cleats 802 that may be located opposite the receptacles 804 shown in FIG. 12) while not overly stiffening and/or inhibiting flexibility of the exterior sole component 850 (and/or a foot support component 100 in which it is included).
FIG. 13 illustrates an alternative band 320 (having at least one elastic or stretchable region or portion) structure having alternative heel securing system features and/or alternative systems for changing the tensile force features. Where the same reference numbers are used in FIG. 13 as used in other figures, the same or similar part is being referenced (with any alternatives or options described above), and much of the overlapping description may be omitted. The band 300 of FIGS. 3A-3C (and others) included a single through hole opening 312 at its heel end 300H for engaging connector 600. Other options are possible. For example, FIG. 13 shows band 320 of this example having a plurality of through hole openings (e.g., three through hole openings 312A, 312B, 312C shown in FIG. 13) spaced apart along the longitudinal direction of the band 320. These openings 312A, 312B, and 312C are arranged to extend through the band 320 in the width direction. The openings 312A, 312B, 312C are sized, shaped, and configured to receive connector 600, and that connector 600 may be engaged with a handle 500 (e.g., as shown in FIGS. 5A-7). Alternatively, if desired, the connector 600 extending through any of openings 312A, 312B, and 312C may be used without the handle 500, e.g., with the connector 600 and/or free end 300E of the band 320 functioning as the handle as described above in conjunction with FIGS. 11A and 11B. In this manner, the free end 300E of the band 320 may function as the handle (so that the handle is integrally formed as part of the band 320). The free end 300E may be shaped with indentations, ridges, or other structures to help a user grasp it.
In addition or as an alternative to adjusting tensile force applied to the band 320 based on the set of retaining elements with which the connector 600 is engaged (e.g., one set of retaining elements 250H1, 250H2, 250H3), tensile force applied by the band 320 of FIG. 13 can be adjusted based on the through hole opening 312A, 312B, 312C with which the connector 600 is engaged. When engaged at the rear heel area in the manner discussed above for the structures shown in FIGS. 1A-9, different tensile forces can be applied to the band 320 depending on which through hole opening 312A, 312B, or 312C is used. If the connector 600 is engaged with through hole opening 312A and with a first retaining element 250H1, the tensile force applied to the band 320 will be greater than the tensile forces applied: (i) if the connector 600 is engaged with through hole opening 312B and with the first retaining element 250H1, and/or (ii) if the connector 600 is engaged with through hole opening 312C and with the first retaining element 250H1.
In the band 320 of FIG. 13, the forefoot through hole opening 310 is somewhat teardrop shaped (as compared to the more circular through hole opening 310 shown in FIGS. 3B and 3C). The teardrop shape can help place the through hole opening 310 over a retaining post (e.g., over retaining post 240) and/or help ease disengagement of the through hole opening 310 from a retaining post. If desired, the example band 300 of FIGS. 3A-3C could include a teardrop shaped opening and/or the band 320 of FIGS. 13 (and 14A discussed below) could include a more circular opening.
FIGS. 14A and 14B illustrate another alternative band 340 (having at least one elastic or stretchable portion or region), heel securing system, and/or system for changing tensile force applied to a band 340. Where the same reference number is used in FIGS. 14A and 14B as used in other figures, the same or similar part is being referenced (with any alternatives or options described above), and much of the overlapping description may be omitted. The heel end 300H of band 340 of FIGS. 14A and 14B differs from those described above. Additionally, the securing components of the heel securing system differ from the securing components (e.g., the hook structures) described above in conjunction with FIGS. 1A-13.
As shown in FIG. 14A, the heel end 300H of band 340 includes two openings 340A and 340B extending through the band 340 in its thickness direction (e.g., in a direction parallel to through hole opening 310 provided at the forefoot end 300F). As shown in FIG. 14B, the rear heel wall 200W of the base foot support component 200 includes a plurality of securing components 280A, 280B, 280C. While other structures are possible, these securing components 280A, 280B, 280C may be formed as retaining posts (e.g., having a structure similar to retaining post 240 with an enlarged free end). The securing components 280A, 280B, 280C may extend outward and rearward from the rear heel wall 200W of the base foot support component 200.
Opening 340A in this example structure is smaller than opening 340B. Opening 340A is sized, shaped, and configured to extend around and be selectively engagable with any individual one of the securing components 280A, 280B, 280C. Opening 340B, on the other hand, is sized and shaped to receive and extend around the other two securing components 280B and 280C when the opening 340A is engaged with securing component 280A (and not necessarily tightly engage any securing component). In this manner, the band 340 will lie more flush against the rear heel wall 200W (and may be better prevented from disengaging from the securing element 280A, 280B, 280C). If necessary or desired, another opening 340C could be provided on the other side of opening 340A, as shown in broken lines in FIG. 14A, to receive securing elements 280A and 280B when opening 340A is engaged with securing element 280B or 280C.
When opening 340A is engaged with securing component 280A, the band 340 will be exposed to less tensile force (and be less stretched) than when opening 340A is engaged with securing component 280B. When opening 340A is engaged with securing component 280B, the band 340 will be exposed to less tensile force (and be less stretched) than when opening 340A is engaged with securing component 280C. Thus, the wearer can adjust the tensile force applied to the band 340 (and thus the responsiveness and energy return properties of a foot support component 100 including the combination of structures shown in FIGS. 14A and 14B) by grasping the free end 300E of the band 340 (as shown in FIG. 14B) and moving opening 340A from one securing element 280A-280C to another. In this manner, the free end 300E of the band 340 may function as the handle (so that the handle is integrally formed as part of the band 340). The free end 300E may be shaped with (e.g., molded to include) indentations, ridges, or other structures to help a user better grasp and hold it. The base foot support component 200 shown in FIG. 14B may be engaged with an exterior sole component 800 and/or 850 (of the types described above), or it may itself act as a ground-engaging component.
FIG. 15A illustrates another example base foot support component 290 and band 300 combination in accordance with some examples of this technology. Where the same reference numbers are used in FIG. 15A as used in other figures, the same or similar part is being referenced (with any alternatives or options described above), and much of the overlapping description may be omitted. In the base foot support component 200 shown in FIGS. 2A, 2B, 2E, and others, the passageway 210 (and thus the band 300 extending through it) followed a substantially curved path through the midfoot region of the base foot support component 200 (and foot support component 100 and article of footwear 180). That curved path substantially matches the surface contour of the upper-facing surface 200U of the base foot support component 200.
In the base foot support component 290 of FIG. 15A, on the other hand, the passageway 210A extends substantially linearly through the midfoot region of the base foot support component 290 (and an article of footwear in which it is contained). Thus, the band 300 located in that passageway 210A extends substantially linearly in the longitudinal direction from the forefoot region to the heel region of the base foot support component 290 (and article of footwear in which it is contained). The band 300 is shown by a broken line in the midfoot area of the passageway 210A in FIG. 15A. As evident from FIG. 15A, the upper-facing surface 200U of the base foot support component 290 has a first curvature through the midfoot region of the base foot support component 290 (and any article of footwear containing it), but the band 300 extends through that midfoot region with less curvature than the first curvature of the upper-facing surface 200U. The base foot support component 290 of FIG. 15A may be well suited for use with the exterior sole component 850 of FIG. 12 (although it could be used with other exterior sole component structures).
As further shown in FIG. 15A, the path of passageway 210A in this example is altered by spacing a portion of the base foot support component 290 defining the passageway 210A away from the upper-facing surface 200U at least in the midfoot region of the base foot support component 290 (and article of footwear in which it may be contained). In fact, in this illustrated example, a through hole opening 290H is defined through the base foot support component 290 between the upper-facing surface 200U and the passageway 210A in the midfoot region of the base foot support component 290 (and article of footwear in which it may be contained). This through hole opening 290H may be of different sizes and/or shapes from that shown in FIG. 15A and may help control and/or improve flexibility through the midfoot region.
FIG. 15B provides a view of the base foot support component 200 of FIGS. 1A-9 to illustrate the differences in the path of passageway 210 of the example of FIGS. 1A-9 (represented by the dot-dash line in FIG. 15B) and the path of passageway 210A of FIG. 15A (represented by the dashed line in FIG. 15B). While not wishing to be bound by any theory of operation, the more direct connection and linear passageway 210A of the example of FIG. 15A may provide improved energy return and responsiveness as compared to a more curved passageway 210.
Other variations in the particular structures shown may be provided without departing from this technology. For example, FIG. 16 shows a bottom view of the base foot support component 290 of FIG. 15A. As shown, the passageway 210A of this example includes several openings through which the band 300 may be exposed. These openings can lighten the weight of the base foot support component 290, improve its the flexibility, and/or better enable threading the band 300, 320, 340 through the passageway 210A. FIG. 16 further shows that the passageway 210A includes gaps or openings 204O over its length, particularly in the forefoot region. These gaps or openings 204O in passageway 210A (four distinct gaps or openings 204O shown in FIG. 16) may be provided at locations to support forefoot flexion. As further shown in FIG. 16, the ground-facing surface 200G of base foot support component 200 of this example includes recesses 204R forming lines of flexion across the forefoot region (in the medial side-to-lateral side direction) at locations corresponding to the gaps or openings 204O.
Also, in this example base foot support component 290, the retaining post 240A for the forefoot securing system extends downward from the ground-facing surface 200G of the base foot support component (as opposed to the upward extending retaining post 240 shown in the examples of FIGS. 1A-9). Thus, the upper-facing surface 200U of this example foot support component 290 does not require recess 212 described above. The forefoot end of the passageway 210A in this example opens at a recess 290R defined in the ground-facing surface 200G of the base foot support component 290. Maintaining the forefoot end 300F of the band 300 at the ground-facing surface 200G of the base foot support component 200 and engaging a downward facing retaining post 240A also may help maintain a somewhat more linear configuration to the band 300 through the midfoot region, e.g., as discussed above in conjunction with FIG. 15A. This configuration with a downward facing post 240A and recess 290R also may provide a more comfortable feel beneath the wearer's foot.
Other structures are possible for the forefoot securing system without departing from this technology. For example, if desired, structures described above could be “flip-flopped” such that: (i) a through hole opening is provided at the forefoot region of the base foot support component 200 and/or the exterior sole component 800 (e.g., like opening 310) and (ii) the band 300 (or 320 or 340) is equipped with a projecting retaining post (e.g., like post 240). Then, the retaining post on the band could be pushed through the opening of the base foot support component 200 and/or the exterior sole component 800. As another example, at the forefoot region, the band 300, 320, 340 could extend upward around the forward toe area and engage a securing component provided at a forward toe portion of the base foot support component 200, the exterior sole component 800, and/or the footwear upper 102. Additionally or alternatively, tensile force adjustment could be provided as part of the forefoot securing system (e.g., by providing two or more securing locations in the forefoot region).
The specific examples described above had at least some portions of the heel securing system provided as part of the base foot support component 200 (e.g., retaining elements provided on the rear heel wall 200W, such as hooks 250H1, 250H2, 250H3 and/or retaining components 280A, 280B, 280C). Additionally or alternatively, as shown in FIG. 17, if desired, retaining elements, such as hooks 850H1, 850H2, and/or 850H3, may be provided at the rear heel area of exterior sole component 800. In this illustrated example, connector 600 is elongated to extend outward (sideways) far enough to engage the retaining elements on the exterior sole component 800. When present as sets of hooks 850H1, 850H2, and/or 850H3, the hooks 850H1, 850H2, 850H3 may have the structures, alternatives, and/or options for hooks 250H1, 250H2, 250H3 described above (and hooks 250H1, 250H2, 250H3 or other securing elements on the base foot support component 200 may be present or omitted). Alternatively, the exterior sole component 800 and base foot support component 200 could be sized and shaped such that hooks 250H1, 250H2, and/or 250H3 are provided on a rear heel wall of exterior sole component 800. Other retaining element and/or securing structures also may be provided in other examples of this technology.
As yet other options, if desired, at least a portion of the rear heel securing system (e.g., hooks 250H1, 250H2, 250H3, hooks 850H1, 850H2, 850H3, retaining components 280A, 280B, 280C, or other structures) may be provided on and/or as part of a heel counter structure. That portion of the rear heel securing system may be provided on and/or as part of a heel counter structure irrespective of whether that heel counter structure part is included with a base foot support component 200, an exterior sole component 800, a component of a footwear upper 102, and/or as a separate component in the footwear structure.
The term “band” as used herein (e.g., for band components 300 (FIGS. 3A-3C), 320 (FIG. 13), and 340 (FIGS. 14A-14B) include components in which at least a portion of the overall band structure is made from an elastic material or a stretchable plastic material, such as a thermoplastic elastomer material. At least the stretchable portion of the band 300, 320, 340 may be flexible and may easily bend and change its shape under applied force, but if stretched, at least that portion will return to or toward its original size and shape when the applied force is removed or sufficiently relaxed. As some more specific examples, if desired: (a) at least a first portion of the longitudinal length L1 of a band 300, 320, 340 (e.g., the forefoot end 300F, see FIG. 13) may be formed from a resilient and stretchable material and (b) at least a second portion of the longitudinal length L1 of a band 300, 230, 340 (e.g., the heel end 300H) may be formed from an unstretchable material (although the unstretchable material also may be flexible, may be easily bent, and may change its shape under applied force). The unstretchable material, when present, may comprise one or more of: a fabric, a polymeric material, a fiber reinforced polymeric material, a metal, a metal alloy, etc. Alternatively, in some examples of this technology, however, the entire longitudinal length L1 of a band 300, 320, 340 may be made from an elastic or stretchable material.
In some examples of this technology, an unstretchable material may be provided at the forefoot end 300F (e.g., around through hole opening 310 or other securing mechanism), e.g., to provide additional strength and/or durability at the connection with the other sole components. Additionally or alternatively, in some examples of this technology, an unstretchable material may be provided at the heel end 300H (e.g., at the area of the heel securing system), e.g., to provide additional strength and/or durability at the heel connection and/or heel securing mechanism. Any desired combination of stretchable regions and unstretchable regions over the longitudinal length L1 direction may be provided, including one or more stretchable regions adjacent and/or separated by one or more unstretchable regions. Thus, a band 300, 320, 340 in accordance with examples of this technology may include one or more stretchable regions and, optionally, one or more unstretchable regions.
In some examples of this technology: (a) the one or more stretchable regions may make up from 10% to 100% of the longitudinal length L1 of a band 300, 320, 340 (and in some examples, from 12% to 90% of the longitudinal length L1, from 15% to 80% of the longitudinal length L1, or from 20% to 60% of the longitudinal length L1) and (b) the one or more unstretchable regions (if present) may make up from 10% to 90% of the longitudinal length L1 of a band 300, 320, 340 (and in some examples, from 12% to 80% of the longitudinal length L1, from 15% to 70% of the longitudinal length L1, or from 20% to 60% of the longitudinal length L1). The presence of one or more unstretchable regions along at least a portion of the longitudinal length L1 may allow one to apply more stretching force and larger step increases in the stretching force (e.g., larger steps of increased force when moving the heel securing system from hooks 250H1 to hooks 250H2 to hooks 250H3) as compared to the changes in forces applied by a band 300, 320, 340 having stretchable material along its entire longitudinal length L1).
Additionally or alternatively, if desired, in at least some examples of this technology, the shape or geometry of the band 300, 320, 340 may change over its longitudinal length L1. This shape and/or geometry change may be used to alter the stretch properties in different regions of the band 300, 320, 340 (e.g., wherein thicker materials stretch less than thinner materials). For example, the heel end 300H of band 320 in FIG. 13 may be somewhat less stretchable than the forefoot end 300F due to the shape (e.g., cross sectional shape) differences between the two ends 300H, 300F.
In at least some examples of this technology, a “stretchable” material or region may have at least 10% greater stretchability than an “unstretchable” material or region present in the same band 300, 320, 340 (and in some examples, at least 25% greater, at least 35% greater, at least 50% greater, at least 75% greater, or even at least 100% greater). Additionally or alternatively, in at least some examples of this technology, an elastic material or a stretchable material will elongate at least 10% under an applied force of 5 kg. In other examples of this technology, the elastic material or stretchable material will elongate at least 15% or at least 20% under an applied force of 5 kg. Additionally or alternatively, an “unstretchable” or “non-elastic” material, in at least some examples of this technology, will elongate less than 10% under an applied force of 5 kg (and in some examples, less than 5%, or even less than 2.5%).
Various component parts may make up the “forefoot securing systems” and/or portions of the “forefoot securing systems” described herein. As some more specific examples, the “forefoot securing systems” may include at one or more of: (a) portions of the bands 300, 320, 340, such as the forefoot end 300F including through hole opening 310, a post (if the forefoot end 300F is equipped with a post), etc.; (b) portions of the base foot support components 200, 290, such as retaining post 240, recess 212, retaining post 240A, a recess or opening (e.g., if the forefoot end 300F of the band 300, 320, 340 is equipped with a retaining post), etc.; and/or (c) portions of the exterior sole component 800, 850 (e.g., to include any part described as being provided by the base foot support components 200, 290).
Various component parts also may make up the “heel securing systems” and/or portions of the “heel securing systems” described herein. As some more specific examples, the “heel securing systems” may include one or more of: (a) portions of the bands 300, 320, 340, such as the heel end 300H including through hole opening 312, through hole openings 312A, 312B, 312C, through hole openings 340A, 340B, 340C, etc.; (b) portions of the base foot support components 200, 290, such as hooks 250H1, 250H2, 250H3, securing components 280A, 280B, 280C, other retaining elements, etc.; (c) portions of the exterior sole component 800, 850 (e.g., to include any part described as being provided by the base foot support components 200, 290), hooks 850H1, 850H2, and/or 850H3, other retaining elements, etc.; (d) portions of handle 500, such as side surfaces 500L, 500M, channels 520L, 520M, gap 520G, etc.; and/or (e) portions of connector 600, such as its free ends 600L, 600M.
Various component parts also may make up the “system for changing the tensile force” applied to the bands 300, 320, 340. As some more specific examples, in addition to the component parts that provide the heel securing systems described above, the “systems for changing the tensile force” may include one or more of: (a) the heel end 300H of the bands 300, 320, 340; (b) grasping portion 510 of handle 500; and/or (c) the presence of a plurality of holes at the heel end 300H of the bands 320, 340.
CONCLUSION The present technology is disclosed above and in the accompanying drawings with reference to a variety of embodiments. The purpose served by the disclosure, however, is to provide an example of the various features and concepts related to this technology, not to limit the scope of the claimed invention. One skilled in the relevant art will recognize that numerous variations and modifications may be made to the embodiments described above without departing from the scope of the presently claimed invention, as defined by the appended claims.
