Footwear product

Abstract

The invention discloses a footwear product which comprises a sole and a vamp, on a side view projection surface of the footwear product, the lower surface of the sole forms an arc-shaped rolling contour which continuously extends to the front end of the sole and warps upwards in a half sole area, and a ground contact plane is formed in a heel area; a sole reference plane is defined by the lowest point of the arc-shaped rolling contour and the ground contact plane; the half sole low point of the arc-shaped rolling contour corresponds to the rear side of the foot metatarsal bone area; the ratio of the distance from the foremost end of the arc-shaped rolling contour to the sole datum plane to the projection length of the arc-shaped rolling contour on the sole datum plane is 1: 1.4 to 1: 1.6; an arc-shaped warping contour which continuously extends to the front end of the vamp, warps upwards to the highest point and then bends downwards is formed on the upper surface of the vamp in the toe cap area; a toe cap reference plane is defined by a toe cap low point of the arc-shaped warped contour and the sole reference plane in parallel, and the toe cap low point corresponds to a foot toe-heel area. The footwear product can improve the adverse effect of long-distance running on the toes of a runner.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of footwear products, in particular to a footwear product. BACKGROUND

[0002] During long-distance running, especially in the latter half of the marathon or downhill section, the runner's gait changes due to the decrease and fatigue of core strength, and the foot repeatedly pushes forward in the shoe cavity, causing the toes to repeatedly hit the inner wall of the toe cap, causing subungual capillary rupture, forming "running black toenails", and in severe cases, even causing the toenails to fall off, causing great pain to the runner and affecting sports performance. SUMMARY

[0003] The purpose of the present application is to overcome the above-mentioned defects or problems existing in the background art, and to provide a footwear product which can improve the adverse effects of long-distance running on the runner's toes.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0005] Technical solution one: a footwear product, comprising: a sole, the upper surface of which continuously extends to form a footbed, and the lower surface of which is adapted to touch the ground at least in the forefoot region and the heel region; and an upper, which is attached above the sole and defines a shoe cavity for accommodating a foot; the part of the upper before the tongue constitutes a toe cap region; wherein, in the side projection plane of the footwear product: the lower surface of the sole constitutes an arc-shaped rolling contour in the forefoot region, which continuously extends to the front end of the sole and curves upward, and constitutes a ground contact plane in the heel region; the lowest point of the arc-shaped rolling contour and the ground contact plane jointly define a sole reference plane; the lowest point of the arc-shaped rolling contour is a forefoot low point, which corresponds to the rear side of the metatarsal region of the foot, and the included angle between the tangent line of the arc-shaped rolling contour at the one-quarter position of the longitudinal direction with the front end of the sole as the starting point and the sole reference plane is greater than 140° and less than 150°; the ratio of the distance from the frontmost end of the arc-shaped rolling contour to the sole reference plane to the projection length of the arc-shaped rolling contour on the sole reference plane is 1:1.4 to 1:1.6; and the upper surface of the upper in the toe cap region constitutes an arc-shaped curvature contour which continuously extends to the front end of the upper and curves upward to a highest point and then bends downward; the lowest point of the arc-shaped curvature contour which is closer to the position of the tongue is a toe cap low point, which defines a toe cap reference plane with the sole reference plane, and the toe cap low point corresponds to the toe heel region of the foot; the highest point of the arc-shaped curvature contour is a toe cap high point, and the included angle between the line connecting the toe cap high point and the toe cap low point and the toe cap reference plane is greater than 10° and less than 20°.

[0006] In the side projection plane of the footwear product, the upper surface of the sole in the forefoot region forms an arc-shaped footbed contour extending continuously to the front end of the sole and curving upward; the distance between the arc-shaped footbed contour and the arc-shaped curving contour in the vertical direction gradually increases from front to back.

[0007] In the side projection plane of the footwear product, the ratio of the vertical distance from the toe high point to the arc-shaped footbed contour to the vertical distance from the toe low point to the arc-shaped footbed contour is 1:1.4 to 1:1.6.

[0008] In the side projection plane of the footwear product, the ratio of the vertical distance from the toe high point to the arc-shaped footbed contour to the width of the transverse section corresponding to the toe high point is 1:1.5 to 1:2.

[0009] In the side projection plane of the footwear product, the toe high point deviates from the longitudinal symmetry center line of the footwear product in the transverse direction and is close to the medial side of the footwear product.

[0010] In the side projection plane of the footwear product, the toe high point is located in the 10% to 20% interval range from the front end of the upper in the longitudinal direction.

[0011] In the longitudinal range of the footbed defined by the sole, the toe low point is located in the 20% to 30% interval range from the front end of the footbed.

[0012] In the side projection plane of the footwear product, the arc-shaped rolling contour is a contour with gradually changing curvature, and the radius of curvature gradually decreases from the forefoot low point toward the front end of the sole.

[0013] In the longitudinal range of the footbed defined by the sole, the forefoot low point is located in the 25% to 40% interval range from the front end of the footbed.

[0014] The sole comprises a midsole and an outsole, the outsole is attached to the bottom surface of the midsole and extends upward at the front end of the sole to form a head, and the upper end of the head is higher than the midpoint of the vertical line from the toe high point to the arc-shaped footbed contour.

[0015] From the above description of the present application, the present application has the following beneficial effects relative to the prior art:

[0016] Technical solution one provides a kind of footwear product, the footwear product includes shoe sole and vamp, which is improved by shape structure and cooperation, improve the adverse effect of runner's toe when runner wears running shoes long-distance running in prior art.In prior art, the physical root of the problem of the adverse effect of runner's toe long-distance running is that runner is in fatigue state, and the horizontal momentum of foot in shoe cavity is generated by inertia, which is finally absorbed by the rigid collision of toe and inner wall of toe cap area of the shoe sole of conventional footwear product is relatively flat, cannot effectively manage or transform this horizontal momentum;At the same time, the internal vertical space of the vamp toe cap area is limited.This jointly causes that toe inevitably extrudes and collides with the front end and upper inner wall of toe cap during forward impact, thereby causing subungual tissue damage.

[0017] The footwear product provided in the scheme has a curved rolling contour that is upwardly curved, and the curved rolling contour has a lowest point, i.e., a forefoot low point, which is located at the rear side corresponding to the metatarsal region of the foot, so as to ensure that the rolling effect occurs before the core area of human body extension force, and provide sufficient action distance for subsequent rolling.The rolling performance of the curved rolling contour is accurately defined by shape parameters: at the quarter position of the longitudinal direction with the front end of the shoe sole as the starting point, the included angle between the tangent line and the shoe sole reference plane is limited to 140° to 150°.The angle is significantly lower than the inclination angle of the shoe sole contour of conventional running shoes, so as to ensure that the front end of the shoe sole has a steep enough lifting rate to generate strong rolling guide force in gait transition.Furthermore, the overall curvature degree of the contour is constrained by the ratio of its height and length: the ratio of the distance from the frontmost end to the shoe sole reference plane to the projection length of the contour on the shoe sole reference plane is limited to 1:1.4 to 1:1.6.The ratio relationship ensures that the entire rolling structure has sufficient geometric dimension to smoothly accommodate and transform the forward momentum of the runner.Thus, the curved rolling contour of the shoe sole can smoothly and effectively transform the horizontal momentum of the body into the movement of the foot rolling forward and upward around the forefoot support point when the gait of the runner transitions from the support period to the extension phase, thereby actively changing the movement trajectory of the foot in the shoe cavity.

[0018] Meanwhile, the upper portion of the shoe product has an upwardly arched curved profile in the toe region thereof. The curved profile has a highest point, i.e. the toe high point, and a lowest point, i.e. the toe low point. The position of the toe low point is set to correspond to the toe-heel region of the foot, which provides a reasonable starting reference for the upwardly arched structure. The overall lifting magnitude of the profile is quantified by the angle between the line connecting the toe high point and the toe low point and the toe reference plane, which is defined to be within the range of 10° to 20°. This angle is significantly higher than the curvature of the upper in the toe region of a conventional running shoe, thereby forming a significant upward protrusion in the toe region and pre-constructing a three-dimensional accommodating space with sufficient vertical height in the upper portion of the shoe cavity.

[0019] More importantly, the above-mentioned sole shape and upper shape cooperate with each other to have an unexpected effect on preventing toe injuries. The sole rolling profile defined by the forefoot low point position, the tangent angle and the height-length ratio actively changes the movement direction of the toes, guiding and decomposing the originally direct forward impact force into an upward movement trend along the curved profile. At the same time, the upper curved profile defined by the toe low point and the angle between the high-low point connecting line provides a buffer region in the changed movement direction. The two work together to enable the toes moving upward guided by the sole to accurately enter a pre-set buffer space with sufficient capacity. This process fundamentally reduces the conditions for rigid collision and extrusion between the toes and the inner wall of the toe. Therefore, the scheme realizes dynamic guidance of the runner's gait through the cooperation of the sole and the upper, which not only provides more accommodation space for the toes, but more importantly changes the movement of the toes in the space, thereby effectively improving the problem of toe injuries caused by long-distance running and improving the wearing comfort and protection of the shoe product.

[0020] In the second technical scheme, the upper surface of the sole, i.e. the footbed, also constitutes an upwardly curved arc-shaped footbed profile in the forefoot region, and the vertical distance between the arc-shaped footbed profile and the arc-shaped curved profile of the upper gradually increases from front to back. This structure makes the geometry of the front part of the shoe cavity more matched with the rolling function of the whole sole, and forms a wedge-shaped internal space with a narrow front and a wide back in the front part of the shoe cavity. When the foot rolls forward and upward under the guidance of the arc-shaped rolling profile, the lifting of the toes is not vertical upward, but is accompanied by the bending of the metatarsophalangeal joint. This wedge-shaped space can exactly accommodate the dynamic form of the toes in this movement process, providing the toes with sufficient activity allowance that conforms to their natural movement trajectory.

[0021] In the third aspect, the fullness of the interior space of the shoe cavity is quantitatively defined by a specific ratio, i.e. the ratio of the vertical distance from the high point of the toe box to the curved footbed profile to the vertical distance from the low point of the toe box to the curved footbed profile is 1:1.4 to 1:1.6. This ensures that the space not only has sufficient height at the highest point, but also has sufficient volume as a whole. This ratio ensures that the height of the shoe cavity increases smoothly and sufficiently from the starting point of the toe box to the highest point, forming a rounded and full dome structure rather than a sharp and cramped arch. This structure can provide a non-pressing accommodation environment for all toes of the user, not just the big toe, especially when the toes are lifted and naturally spread out, effectively avoiding contact and compression from above the shoe upper.

[0022] In the fourth aspect, the interior space of the shoe cavity is defined in the lateral dimension by a specific ratio, i.e. the ratio of the vertical distance from the high point of the toe box to the curved footbed profile to the corresponding lateral cross-sectional width at this point is 1:1.5 to 1:2. This ratio ensures that the shoe cavity space has sufficient lateral width to match the sufficient vertical height. This prevents the toe box area from forming a structure that is high but narrow, which can still squeeze the toes from the side. Therefore, this aspect ensures that the constructed interior space can accommodate the upward lifting and lateral spreading of the toes during the toe-off process, so that the protection of the toes is achieved in three dimensions.

[0023] In the fifth aspect, the high point of the toe box is further defined as being offset from the longitudinal center line of the footwear product in the lateral direction and being close to the medial side. In the foot structure of most people, the big toe is the highest and longest toe and is also the part most susceptible to impact during running. This aspect precisely places the highest point of the space, i.e. the region with the largest volume, directly above the big toe that needs the most protection. This design maximizes the utilization efficiency of the space and provides the most effective and targeted protection for the most vulnerable part without unnecessarily increasing the overall volume of the shoe.

[0024] In the sixth aspect, the position of the high point of the toe box in the longitudinal direction is further defined as being within the 10% to 20% interval from the front end of the shoe upper. This position ensures that the highest point of the shoe cavity is located exactly at the critical area of the nail cover and joints at the end of the toes. If the highest point is too far forward, the toe joints cannot be effectively protected; if it is too far back, the protection of the toe nails will be lost.

[0025] In the seventh aspect, the position of the toe low point in the longitudinal range of the footbed is further limited to the interval of 20% to 30% from the front end of the footbed. When the foot rolls forward and upward along the arc-shaped rolling contour, the metatarsophalangeal joint of the foot bends and the phalangeal part lifts upward. Since the toe low point is arranged at the root of the phalangeal part in this aspect, the entire upwardly lifted phalangeal part can be completely covered in the protective space formed by the arc-shaped rolling contour, thereby further enhancing the protection effect on the toes of the runner. If the toe low point is too far forward (less than 20%), the starting point of the arch-shaped space is too early, and the joint at the root of the phalangeal part may not be covered enough. If the position is too far back (greater than 30%), the front end of the phalangeal part may first contact the low and unlifted upper part when moving upward, thereby greatly reducing the effect of the protective space.

[0026] In the eighth aspect, the arc-shaped rolling contour is further limited to a contour with a gradually changing curvature, and the radius of curvature gradually decreases from the forefoot low point toward the front end of the sole. Compared with a simple arc with a constant radius, the contour with a gradually changing curvature has more kinematic characteristics similar to natural gait. In the initial rolling stage, the larger radius of curvature provides stable support, and the gradually decreasing radius of curvature accelerates the rolling process as the center of gravity moves forward. This structure makes the transition from the support mid-stage to the toe-off more smooth, natural and efficient, reduces energy loss in gait transition, and further enhances the effect of the rolling structure on guiding foot movement and converting horizontal momentum.

[0027] In the ninth aspect, the position of the forefoot low point in the longitudinal range of the footbed is further limited to the interval of 25% to 40% from the front end of the footbed. By precisely limiting the starting point of rolling to a geometric interval, the point at which the rolling effect occurs is highly consistent and predictable among different users.

[0028] In the tenth aspect, the sole includes a midsole and an outsole, and the outsole extends upward at the front end of the sole to form a hood, and the upper end of the hood is higher than the midpoint of the vertical line connecting the toe high point to the arc-shaped footbed contour. The hood formed by the extension of the outsole material has the physical characteristics of wear resistance and impact resistance. It provides the first layer of external physical protection for the toe area and can resist direct impact from road obstacles. At the same time, its defined height ensures that it covers the key area of the toe and positively enhances the structural stability of the front part of the upper, thereby keeping the shoe cavity structure built by the upper and the sole stable and further reducing the impact of the runner's toes on the upper during long-distance running. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiment description are briefly introduced as follows. Obviously, the drawings in the embodiment description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0030] Figure 1 A side view schematic diagram of a shoe product in the prior art;

[0031] Figure 2 A toe comparison schematic diagram of a shoe product related to the embodiments of the present application and a shoe product in the prior art;

[0032] Figure 3 A side view schematic diagram of a shoe product related to the embodiments of the present application.

[0033] Main drawing mark explanation:

[0034] Sole 100; forefoot region 101; heel region 102; ground contact plane 103; midsole 104; outsole 105; toe cap 106; arch region 107; arcuate roll-over contour 110; forefoot low point 111; forefoot tangent point 112; arcuate footbed contour 120; sole reference plane 130;

[0035] Upper 200; toe region 201; arcuate flex contour 210; toe low point 211; toe high point 212; upper reference plane 220. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are the preferred embodiments of the present application, and should not be seen as excluding other embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without any creative effort under the premise of the present application, all belong to the scope of protection of the present application.

[0037] In the claims, the description and the above drawings of the present application, unless otherwise explicitly limited, the terms such as "first", "second" or "third" are used only to distinguish different objects, and are not used to describe a specific order.

[0038] Unless otherwise expressly defined, in the claims, description, and accompanying drawings of this invention, the use of directional terms such as "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," and "counterclockwise" to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing the invention and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific scope of protection of this invention.

[0039] Unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" used in the claims, description and drawings of this invention should be interpreted broadly to refer to any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection and fixed connection by other means or components.

[0040] In the claims, description and accompanying drawings of this invention, the terms "comprising," "having," and variations thereof are used to mean "including but not limited to."

[0041] Example

[0042] Reference Figure 1 It shows a side view of a running shoe in the prior art.

[0043] Reference Figure 2 ,in Figure 2 The left side is a schematic diagram of the toe section of a footwear product according to an embodiment of the present invention, and the right side is a schematic diagram of the toe section of a running shoe in the prior art. Figure 2 As can be seen, the toe of the footwear product involved in the embodiments of the present invention has a more upright shape and structure compared with the toe of running shoes in the prior art.

[0044] Next refer to Figure 3The shoe product according to the embodiment of the present application is shown in FIG. 1, which includes a sole 100 and an upper 200. The upper 200 is attached to the sole 100, and the attachment can be by means of hot melting, gluing, sewing, etc. The upper 200 can be a one-piece woven upper 200, such as an engineered mesh upper 200 or a flyknit upper 200, which is knitted from yarns. The upper 200 can be designed to have different functions in different areas by changing the knitting density and structure, such as having large mesh in areas requiring breathability and having dense knitting in areas requiring support. The upper 200 can also be made of multiple pieces of material, and have reinforcing pieces of hot melt or TPU (thermoplastic polyurethane) at key locations to provide additional wrapping and stability. The sole 100 includes a midsole 104 and an outsole 105. The midsole 104 can be a cushioning layer made of elastic foamed material. Specifically, the elastic foamed material can be selected from ethylene-vinyl acetate copolymer (EVA), thermoplastic polyurethane (TPU), polyether block amide (PEBA), or a blend of any combination thereof. In order to achieve light weight and high resilience, the foamed material is preferably made by a supercritical fluid foaming process (e.g., nitrogen foaming). The outsole 105 can be a wear-resistant layer attached to the bottom surface of the midsole 104, which is usually made of rubber material. In order to achieve light weight while ensuring durability and grip, the outsole 105 can be designed in a zoned or hollowed-out manner, i.e., only having wear-resistant rubber patches in high-wear areas (e.g., lateral heel and forefoot toe spring area) and key grip areas of the sole 100, and exposing the midsole 104 material in other areas.

[0045] Referring to Figure 3 FIG. 2 is a side view of the shoe product, and the outer contour thereof can be regarded as a side projection plane of the shoe product, which refers to a projection plane parallel to the longitudinal vertical plane of the shoe product.

[0046] The upper surface of the sole 100 is continuously extended to form a footbed, and the lower surface of the sole 100 is adapted to touch the ground at least in the forefoot region 101 and the heel region 102. The upper surface of the midsole 104 forms the upper surface of the sole 100, and the upper surface of the sole 100 is provided as a continuous and shape-adapted footbed structure to provide a direct contact support platform for the foot, and a shoe insole can be further provided above the footbed in actual application. Moreover, based on the shape of the midsole 104, the sole 100 can be divided into the forefoot region 101, the arch region 107 and the heel region 102 corresponding to the foot in the longitudinal direction. The division of the regions is not a detailed division of the sole 100 at specific positions, but a rough division corresponding to the parts of the foot, which is well known to those skilled in the art. Meanwhile, the lower surface of the sole 100 can touch the ground in the forefoot region 101 and the heel region 102, which means that at least at a certain moment, the part of the lower surface of the sole 100 in the forefoot region 101 and the part of the lower surface of the sole 100 in the heel region 102 can touch the ground at the same time. Thus, a sole 100 reference plane can be constructed by the lower surface of the sole 100.

[0047] Specifically, in the side projection plane of the shoe product: the lower surface of the sole 100 forms an arc-shaped rolling contour 110 continuously extending to the front end of the sole 100 and upwardly curved in the forefoot region 101, and forms a ground contact plane 103 in the heel region 102; a sole 100 reference plane is jointly defined by the lowest point of the arc-shaped rolling contour 110 and the ground contact plane 103. The heel region 102 has a substantially planar ground contact plane 103, which can be mostly in full contact with the ground. Meanwhile, the lower surface of the sole 100 forms an arc-shaped rolling contour 110 with a curved structure in the forefoot region 101, which extends from the rear to the front end of the sole 100 and upwardly curves, and the arc-shaped rolling contour 110 forms a lowest point, i.e. a forefoot low point 111, in the forefoot region 101, and the ground contact plane 103 formed by the heel region 102 is just such that the forefoot low point 111 is located in the plane. That is, when the sole 100 is placed on the ground, the forefoot low point 111 is always located in the plane of the ground contact plane 103, regardless of whether the heel region 102 touches the ground or not, even if the ground contact plane 103 has an inclination angle with the ground at this time.

[0048] The forefoot low point 111 corresponds to the rear side of the metatarsal region of the foot. Specifically, the metatarsal region of the foot refers to the region of the foot in human anatomy that is formed by the five long bones, i.e. metatarsals, and their associated soft tissues, which connect the tarsal bones of the rear foot with the phalanges of the forefoot toes. This region functionally forms the main body of the midfoot and extends forward to what is commonly referred to as the forefoot. Thus, the "rear side of the metatarsal region" refers to the region of the metatarsals proximate to the base of the tarsal bones, while the front end of the metatarsals is the metatarsal head region that connects with the phalanges and serves as the pivot for the push-off motion. Further, the forefoot low point 111 is located within the range of 25% to 40% of the longitudinal extent of the footbed defined by the sole 100, measured from the front end of the footbed. Specifically, the forefoot low point 111 is the geometrically lowest point of the arcuate rolling contour 110, and functionally it serves as the key fulcrum point for the transition of the runner's center of gravity from the midfoot to the forefoot. By locating this fulcrum point within the range of 25% to 40% of the front end of the footbed, the timing of the rolling initiation is optimally matched with the push-off phase of the natural gait cycle. If the forefoot low point 111 is located too far back (e.g. less than 25%), the rolling initiation will be too early, which can result in insufficient stability of the midfoot support and a feeling of unnatural and too fast forward collapse. Conversely, if the forefoot low point 111 is located too far forward (e.g. more than 40%), the rolling initiation will be too late, and the metatarsophalangeal joints of the foot will have already started to flex for the push-off, and the rolling structure of the sole 100 will not be able to effectively perform its role of guiding the gait and converting energy, resulting in a dull shoe feel and an unnoticeable rolling sensation. Thus, this range is an optimized geometric range that ensures the full and effective functioning of the rolling structure. Preferably, the forefoot low point 111 is located at 32% of the longitudinal extent of the footbed, measured from the front end of the footbed.

[0049] The tangent line of the arc-shaped rolling contour 110 at the one-fourth position of the longitudinal direction of the shoe sole 100 is greater than 140° and less than 150° with respect to the reference plane of the shoe sole 100. Specifically, the tangent line refers to the instantaneous direction line of a point on the curve of the arc-shaped rolling contour 110, which objectively reflects the inclination of the point contour. The tangent point of the arc-shaped rolling contour 110 at the one-fourth position is the forefoot tangent point 112, and the tangent line of the forefoot tangent point 112 intersects the reference plane of the shoe sole 100 to form an angle. The angle here refers to the obtuse angle formed by the two straight lines. The angle of the tangent line is preferably 140° to 150°, and is set to 145° in the embodiment. The shape of the tangent line angle is limited, and the position of the forefoot low point 111 in the longitudinal direction is limited, which structurally forms an extremely steep upward inclined surface of the arc-shaped rolling contour 110. This specific geometric shape is one of the core structures that distinguishes the relatively flat profile of the front end of the traditional running shoe sole 100. It is this steep slope structure that allows the interaction point between the shoe sole 100 and the ground to quickly move forward and upward when the runner's foot rolls to this position, thereby physically guiding the foot to accelerate off the ground and shorten the ground contact time. If the slope shape defined by the angle is too flat (the angle is less than 140°), the guiding effect will not be obvious; if the shape is too steep and close to horizontal (the angle is greater than 150°), a "platform" structure will be formed, which will instead interrupt the continuity of the rolling. Therefore, the specific slope shape defined by the angle range is the structural basis for achieving a fast gait transition.

[0050] And, the ratio of the distance from the front end of the arc-shaped rolling contour 110 to the reference plane of the sole 100 to the length of the projection of the arc-shaped rolling contour 110 on the reference plane of the sole 100 is 1:1.4 to 1:1.6. Specifically, the "distance from the front end of the arc-shaped rolling contour 110 to the reference plane of the sole 100" refers to the maximum dimension of the arc-shaped rolling contour 110 in the vertical direction, which can be referred to as the total height; and the "length of the projection of the arc-shaped rolling contour 110 on the reference plane of the sole 100" refers to the effective range of the arc-shaped rolling contour 110 in the horizontal direction, which can be referred to as the horizontal span. The ratio is preferably 1:1.4 to 1:1.6, and in the present embodiment, it is set to 1:1.5. The shape defined by the ratio limits a full and relaxed arc-shaped geometry in structure, which forms a coordinated proportional relationship between the vertical height and the horizontal span of the two dimensions. This specific geometric shape is one of the core structures that distinguishes the traditional running shoes from the excessively flat or excessively protruding forefoot contour. It is this coordinated geometric structure that ensures that the sole 100 can provide sufficient lifting height to generate an effective rolling lever and sufficient effective length to ensure smooth and stable transition. If the shape defined by the ratio is too flat (the ratio is less than 1:1.6, for example, 1:2.0), the force arm and effect of the rolling guide will be insufficient; if the shape is too short and steep (the ratio is greater than 1:1.4, for example, 1:1.2), it will disrupt the smoothness of the rolling and may cause structural instability. Therefore, the overall shape defined by the proportional range is the structural carrier for achieving efficient and stable gait transition.

[0051] In the present embodiment, the arc-shaped rolling contour 110 is a contour with a gradually changing curvature, and the radius of curvature gradually decreases from the forefoot low point 111 towards the front end of the sole 100. Specifically, the radius of curvature is a term describing the degree of curvature of a curve, and its value is inversely proportional to the degree of curvature of the curve, i.e. a large radius of curvature corresponds to a gentle curve shape, and a small radius of curvature corresponds to a sharp curve shape. In the present scheme, the arc-shaped rolling contour 110 is not a simple circular arc with constant curvature, but a non-equal-radius curve structure with continuously changing curvature. The shape of the gradually changing curvature limits a composite curve that starts gently and ends tightly in structure. It is this composite curve structure that makes the sole 100 have a gentle and open arc shape in the area close to the forefoot low point 111, providing a stable support platform for foot transition; and in the area close to the front end of the sole 100, it has a sharp and curved arc shape to provide a stronger acceleration rolling effect. If the entire contour curvature is too small (the shape is too flat), the rolling sensation will not be obvious; if the entire contour curvature is too large (the shape is too curved), the stability will decrease.

[0052] Referring to Figure 3In the side projection of the footwear product: the upper surface of the upper 200 in the toe region 201 constitutes an arc-shaped curved profile 210 that extends continuously to the front end of the upper 200 and curves upward to a highest point and then curves downward. The arc-shaped curved profile 210 is the most important external geometric feature of the upper 200 in the toe region 201, which structurally encloses a three-dimensional accommodating space above the toes of the foot inside the shoe cavity through a continuous and smooth curved surface. The profile gently rises from the position close to the tongue, reaches a highest point, and then descends with a certain curvature to the front end of the upper 200. This specific arch or dome structure has the core function of providing a preset non-contact movement allowance for the upward movement of the toes during the gait cycle, especially during the toe-off stage, thereby forming a functional synergy with the arc-shaped rolling profile 110 of the sole 100.

[0053] Specifically, the lowest point of the arc-shaped curved profile 210 closer to the position of the tongue is the toe low point 211. The toe low point 211 is parallel to the reference plane of the sole 100 and defines a toe reference plane, and the toe low point 211 corresponds to the toe-heel region of the foot. The toe low point 211 here is the starting point of the arc-shaped curved profile 210 that significantly rises upward, which provides a stable reference for subsequent angle and height measurements. The toe reference plane is a reference plane parallel to the reference plane of the sole 100 constructed through the toe low point 211, which ensures that the measurement of the profile of the upper 200 is not affected by the inclination of the sole 100 itself, and is objective and repeatable. The toe-heel region refers to the metatarsophalangeal joint region connecting the toes and the main part of the foot in anatomy. Further, the toe low point 211 is preferably located in the 20% to 30% interval range from the front end of the footbed defined by the sole 100, which is set to 25% in this embodiment. This interval setting ensures that the starting point of the arch-shaped space formed by the arc-shaped curved profile 210 can accurately cover the entire toe region, especially the metatarsophalangeal joint. If the starting point is too far back (more than 30%), the front end of the toe may contact the low upper 200 when lifting; if it is too far forward (less than 20%), the protection space cannot cover the root joint of the toes.

[0054] The highest point of the arc-shaped warping profile 210 is a toe high point 212, and the angle between the line connecting the toe high point 212 and the toe low point 211 and the toe reference plane is greater than 10° and less than 20°. Specifically, the toe high point 212 is the maximum point of the arc-shaped warping profile 210 in the vertical direction, and the line connecting the toe high point 212 and the toe low point 211 objectively reflects the overall lifting trend of the profile from the beginning to the vertex. The angle between the line and the toe reference plane quantifies the steepness of the lifting trend. The angle is preferably 10° to 20°, and is set to 15° in the embodiment. The shape of the angle range structurally forms a significant, rather than flat, arched or domed structure of the upper 200. It is this arched structure that creates sufficient vertical space inside the shoe cavity to accommodate the upward movement of the toes guided by the rolling profile of the sole 100. If the arched structure defined by the angle is too flat (the angle is less than 10°), the vertical space provided will not be sufficient to avoid contact and friction of the toes with the lining of the upper 200, and the protection effect will not be obvious. If the shape is too prominent (the angle is greater than 20°), the shoe cavity space will be too large, affecting the wrapping and locking of the forefoot, and may cause unnecessary appearance redundancy. Referring to Figure 2 It can be intuitively observed that the toe of the footwear product involved in the embodiment has a steeper lifting trend than the toe of the running shoes in the prior art.

[0055] Also, on the side projection plane of the footwear product, the toe high point 212 is located in the 10% to 20% interval range of the longitudinal direction from the front end of the upper 200. In the embodiment, it is set to 15%. This interval setting ensures that the highest point of the shoe cavity is located exactly in the key area of the toe nail cover and joint. If the highest point is too far forward, the toe joint cannot be effectively protected; if it is too far back, the protection of the toe nail part will be lost.

[0056] Further, the toe height point 212 is laterally offset from the longitudinal symmetry center line of the footwear product and is close to the medial side of the footwear product. Specifically, the "longitudinal symmetry center line" here refers to a center reference line on the top projection plane of the footwear product that divides it into two sides, i.e., the medial side and the lateral side. In the foot structure of most people, the big toe (hallux) is usually significantly larger than the other four toes in both length and height. At the same time, at the last stage of the running toe-off, the big toe is also the part that bears the most pressure and lifts up the most. Therefore, by arranging the most spacious point of the interior space of the toe box, i.e., the toe height point 212, in the area directly above the big toe close to the medial side, the maximum utilization efficiency of space can be achieved. This asymmetric structural design can provide the most needed and largest range of motion for the big toe without unnecessarily increasing the overall profile and volume of the shoe. Compared to the symmetric arch structure, this asymmetric design can better fit the asymmetric morphology of the foot, providing excellent protection while also ensuring precise wrapping of the lateral side (little toe side) of the foot, avoiding the problem of decreased wrapping due to excessive space. Further, the offset distance of the toe height point 212 from the longitudinal symmetry center line in the lateral direction is preferably 5% to 15% of the corresponding lateral cross-sectional width of the point. This proportion range ensures that the asymmetry is significantly effective, while avoiding the appearance imbalance or excessive compression of the lateral toes caused by excessive deviation to the medial side.

[0057] Further, on the side projection plane of the footwear product, the upper surface of the sole 100 forms an arc-shaped footbed contour 120 in the forefoot region 101 that continuously extends to the front end of the sole 100 and curves upward. Specifically, the "arc-shaped footbed contour 120" here refers to the upper surface of the sole 100, i.e., the plane that supports the user's foot bottom, also has an upward curved geometry in the toe region 201 that matches the arc-shaped rolling contour 110 of the lower surface of the sole 100. This structure, together with the arc-shaped curved contour 210 of the upper 200, encloses the interior space of the shoe cavity. And the distance between the arc-shaped footbed contour 120 and the arc-shaped curved contour 210 in the vertical direction gradually increases from front to back, structurally shaping an internal space contour that gradually "opens" like a wedge from the front end of the upper 200 to the rear. When the foot rolls upward and forward under the guidance of the rolling contour of the sole 100, the toes bend upward with the metatarsophalangeal joint as the axis, and the motion trajectory is an arc. This wedge-shaped space that gradually increases from front to back can exactly provide sufficient and interference-free movement allowance for the toes throughout the arc motion, thereby ensuring that the dynamic motion guided by the sole 100 can smoothly occur inside the shoe cavity, making the overall protection more comprehensive and effective.

[0058] The ratio of the vertical distance from the toe box high point 212 to the arc-shaped footbed contour 120 to the vertical distance from the toe box low point 211 to the arc-shaped footbed contour 120 is 1:1.4 to 1:1.6 in the side projection of the footwear product. Specifically, the "vertical distance from the toe box high point 212 to the arc-shaped footbed contour 120" refers to the net height of the interior of the shoe cavity at the highest point; while the "vertical distance from the toe box low point 211 to the arc-shaped footbed contour 120" refers to the initial net height at the starting point of the wedge-shaped space. A ratio of 1:1.4 to 1:1.6, preferably 1:1.5, ensures that the interior height of the shoe cavity is sufficiently and gently increased from the starting point of the lifting (toe box low point 211) to the highest point (toe box high point 212). Structurally, this shapes a rounded and voluminous interior dome rather than a sharp or cramped arch. This full geometry can provide a non-pressing accommodation environment for all toes of the user, especially in the state of lifting and naturally spreading apart, thereby avoiding contact and compression from above the lining of the upper 200. If the ratio is too small (less than 1:1.4), the degree of elevation of the interior space is insufficient, and the protection effect is not obvious; if the ratio is too large (greater than 1:1.6), the space form is too prominent, which may affect the wrapping.

[0059] The ratio of the vertical distance from the toe box high point 212 to the arc-shaped footbed contour 120 to the width of the transverse section corresponding to the toe box high point 212 is 1:1.5 to 1:2 in the side projection of the footwear product. Specifically, the "width of the transverse section" refers to the horizontal width of the interior of the shoe cavity at the longitudinal position of the toe box high point 212. The ratio is preferably 1:1.8. This structure further increases the height space of the toe box part compared to the toe box of the prior art running shoes, thereby better accommodating the lifting movement of the toes upward. At the same time, this proportional relationship ensures that the shoe cavity space has sufficient transverse width while having sufficient vertical height. This prevents the toe area 201 from forming a structure that is high but narrow, which still squeezes the toes from the side. Therefore, the present scheme ensures that the constructed interior space can accommodate the upward lifting and lateral expansion of the toes during the toe-off process at the same time, so that the protection of the toes is realized in three-dimensional level.

[0060] In addition, the outsole 105 extends upward at the front end of the sole 100 to form a toe cap 106, the upper end of which is higher than the midpoint of the vertical line connecting the toe height 212 to the arc-shaped footbed contour 120. Specifically, the toe cap 106 refers to the structure formed by the rubber material of the outsole 105, which is bent upward and extended at the front end of the sole 100 through an integrated molding or injection molding process to cover and fit the lowermost front end of the upper 200. The core function of this structure is to provide a solid and wear-resistant external physical barrier for the toe cap. Moreover, the upper edge of the toe cap 106 extends upward beyond 50% of the internal net height of the shoe cavity. Therefore, the toe cap 106 is a functional protective wall with a considerable coverage area and height. It can effectively protect the lower half of the front end of the upper 200, which is most susceptible to wear and impact, and provide additional structural support for the junction of the midsole 104 and the upper 200.

[0061] The shoe product involved in the present embodiment includes a sole 100 and an upper 200, which are improved in shape and structure to address the adverse effects of long-distance running on the toes of runners wearing running shoes in the prior art. In the prior art, the physical root cause of the adverse effects of long-distance running on the toes of runners is that the forward horizontal momentum of the foot in the shoe cavity due to inertia is eventually absorbed by the rigid collision of the toes with the inner wall of the toe cap when the runner is in a state of fatigue. The relatively flat forefoot region 101 of the sole 100 of conventional shoe products cannot effectively manage or convert this horizontal momentum; at the same time, the internal vertical space of the toe cap region 201 of the upper 200 is limited. This combination inevitably leads to repeated and high-frequency extrusion and impact of the toes with the front and upper inner walls of the toe cap during forward impact, causing subungual tissue damage.

[0062] The shoe product has a sole 100 with an upwardly curved rolling profile 110, which has a lowest point, i.e. a forefoot low point 111, located at the rear side corresponding to the metatarsal region of the foot, ensuring that the rolling effect occurs before the core area of the human body during the extension of the leg, providing sufficient action distance for subsequent rolling. The rolling performance of the curved rolling profile 110 is precisely defined by the shape parameters: at the longitudinal quarter position of the front end of the sole 100, the tangent angle with the reference plane of the sole 100 is limited to between 140° and 150°. This angle is significantly lower than the inclination angle of the sole 100 profile of the conventional running shoes, ensuring that the front end of the sole 100 has a steep enough lift rate to generate strong rolling guide force during gait transition. Furthermore, the overall curvature of the profile is constrained by the ratio of its height to length: the distance from the frontmost end of the profile to the reference plane of the sole 100, to the projected length of the profile on the reference plane of the sole 100, is limited to a ratio of 1:1.4 to 1:1.6. This ratio ensures that the entire rolling structure has sufficient geometric dimensions to smoothly accommodate and convert the forward momentum of the runner. Thus, the curved rolling profile 110 of the sole 100 can smoothly and effectively convert the horizontal momentum of the body forward into the rolling motion of the foot around the forefoot support point upward and forward, thereby actively changing the movement trajectory of the foot in the shoe cavity.

[0063] At the same time, the upper 200 part of the shoe product has an upwardly arched curved profile 210 in the toe region 201. The curved profile 210 has a highest point, i.e. a toe high point 212, and a lowest point, i.e. a toe low point 211. The toe low point 211 is located at the toe region of the foot, providing a reasonable starting reference for the upwardly arched structure. The overall lift amplitude of the profile is quantified by the angle between the line connecting the toe high point 212 to the toe low point 211 and the toe reference plane, which is limited to a range of 10° to 20°. This angle is significantly higher than the curvature of the upper 200 in the toe region 201 of the conventional running shoes, forming a significant upward protrusion in the toe region 201 and pre-building a three-dimensional accommodation space with sufficient vertical height in the upper part of the shoe cavity.

[0064] More importantly, the above-mentioned cooperation between the shape of the sole 100 and the shape of the upper 200 plays an unexpected role in preventing toe injuries. The rolling contour of the sole 100, which is defined by the position of the forefoot low point 111, the tangent angle and the height-to-length ratio, actively changes the direction of the toe movement, and guides and decomposes the originally direct forward impact force into an upward movement along the arc-shaped contour. At the same time, the flex contour of the upper 200, which is defined by the position of the toe low point 211 and the angle of the high-low point connecting line, provides a buffer area in the changed direction of movement. The two work together to enable the toe, which is guided upward by the sole 100, to accurately enter a pre-set buffer space with sufficient capacity. This process fundamentally reduces the conditions for rigid collision and extrusion between the toe and the inner wall of the toe box. Therefore, the above-mentioned cooperation between the sole 100 and the upper 200 achieves dynamic guidance of the runner's gait, which not only provides more space for the toe, but more importantly changes the way the toe moves in that space, thereby effectively improving the problem of toe injuries caused by long-distance running and improving the comfort and protection of the footwear product.

[0065] The above description and examples of the specification are used to explain the scope of protection of the present application, but do not constitute a limitation on the scope of protection of the present application. Through the inspiration of the present application or the above-mentioned examples, those skilled in the art can obtain modifications, equivalent replacements or other improvements of the embodiments of the present application or part of the technical features thereof by combining common knowledge, ordinary technical knowledge in the art and / or prior art through logical analysis, reasoning or limited experiments, which should be included in the scope of protection of the present application.

Claims

1. A footwear product, characterized in that it comprises: a sole (100) whose upper surface extends continuously to form a footbed and whose lower surface is adapted to touch the ground at least in the forefoot region (101) and the heel region (102); and an upper (200) attached above the sole (100) and defining a shoe cavity for accommodating a foot; the portion of the upper (200) in front of the tongue thereof forms a toe region (201); wherein, in the side projection of the footwear product: the lower surface of the sole (100) forms, in the forefoot region (101), an arc-shaped rolling profile (110) that extends continuously to the front end of the sole (100) and curves upward, and forms, in the heel region (102), a ground contact plane (103); the lowest point of the arc-shaped rolling profile (110) and the ground contact plane (103) jointly define a sole (100) reference plane; the lowest point of the arc-shaped rolling profile (110) is a forefoot low point (111), which corresponds to the rear side of the metatarsal region of the foot, and the tangent at the longitudinal quarter position of the arc-shaped rolling profile (110) from the front end of the sole (100) has an angle greater than 140° and less than 150° with the sole (100) reference plane; the ratio of the distance from the frontmost end of the arc-shaped rolling profile (110) to the sole (100) reference plane to the projection length of the arc-shaped rolling profile (110) on the sole (100) reference plane is 1:1.4 to 1:1.6; and the upper surface of the upper (200) forms, in the toe region (201), an arc-shaped flex profile (210) that extends continuously to the front end of the upper (200) and curves upward to a highest point and then bends downward; the lowest point of the arc-shaped flex profile (210) that is closer to the position of the tongue is a toe low point (211), which defines a toe reference plane parallel to the sole (100) reference plane, and the toe low point (211) corresponds to the toe region of the foot; the highest point of the arc-shaped flex profile (210) is a toe high point (212), and the angle between the line connecting the toe high point (212) to the toe low point (211) and the toe reference plane is greater than 10° and less than 20°.

2. A footwear product as defined in claim 1, characterized in that In the side projection of the footwear product, the upper surface of the sole (100) forms, in the forefoot region (101), an arc-shaped footbed profile (120) that extends continuously to the front end of the sole (100) and curves upward; the distance between the arc-shaped flex profile (210) and the arc-shaped footbed profile (120) in the vertical direction gradually increases from front to back.

3. An article of footwear according to claim 2, wherein the first and second portions are formed from a single piece of material. In the side projection of the footwear product, the ratio of the vertical distance from the toe high point (212) to the arc-shaped footbed profile (120) to the vertical distance from the toe low point (211) to the arc-shaped footbed profile (120) is 1:1.4 to 1:1.

6.

4. An article of footwear according to claim 2, wherein the first and second portions are formed from a single piece of material. The ratio of the vertical distance from the toe high point (212) to the arcuate footbed profile (120) to the width of the lateral cross-section corresponding to the toe high point (212) is 1:1.5 to 1:2 on the lateral projection plane of the footwear product.

5. A footwear product as claimed in claim 3 or 4, characterised in that, The toe high point (212) is laterally offset from the longitudinal centerline of the footwear product and is proximate to the medial side of the footwear product.

6. A footwear product as claimed in claim 3 or 4, characterised in that the The toe high point (212) is located within the 10% to 20% range from the front end of the upper (200) in the longitudinal direction on the lateral projection plane of the footwear product.

7. A footwear product as claimed in claim 3 or 4, characterised in that, The toe low point (211) is located within the 20% to 30% range from the front end of the footbed defined by the sole (100) in the longitudinal direction.

8. An article of footwear according to claim 1, wherein, The arcuate rolling profile (110) is a profile with a gradually changing curvature, and the radius of curvature gradually decreases from the forefoot low point (111) toward the front end of the sole (100).

9. An article of footwear according to claim 1, wherein, The forefoot low point (111) is located within the 45% to 60% range from the front end of the footbed defined by the sole (100) in the longitudinal direction.

10. An article of footwear according to claim 1, wherein, The sole (100) includes a midsole (104) and an outsole (105), the outsole (105) is attached to the bottom surface of the midsole (104) and extends upward at the front end of the sole (100) to form a toe cap (106), the upper end of the toe cap (106) is higher than the midpoint of the vertical line connecting the toe high point (212) to the arcuate footbed profile (120).

Images