Rebound torsion-resistant sole and shoe

Abstract

The invention provides a rebound torsion-resistant sole and a shoe. The sole comprises a first midsole and a second midsole. The front end of the heel part extends forwards to form a first wing part, a second wing part, a third wing part and a fourth wing part, the first wing part and the second wing part are arranged at intervals in the width direction, and the third wing part and the fourth wing part are located above the two wing parts. The first wing part is located on the outer foot side and extends to the front end of the sole, and the second wing part is located on the inner foot side and extends to the metatarsal area; the front ends of the third wing part and the fourth wing part are downwards connected to the first wing part and the second wing part respectively and are flush in the front-back direction. The second insole is provided with a supporting part and a foot bed part, the supporting part is embedded between the first wing part and the second wing part, and the foot bed part is embedded between the third wing part and the fourth wing part. The rebound rate of the second midsole is higher than that of the first midsole, and the damping G value of the first midsole is lower than that of the second midsole. The sole can provide good rebound resilience and torsion resistance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of shoe sole structure, in particular to a rebound and torsion-resistant shoe sole and shoe. BACKGROUND

[0002] Footwear products include an upper and a sole structure. The upper can be formed of suitable materials to receive, secure and support the foot on the sole structure. The upper can cooperate with laces, hook-and-loop fasteners or other fasteners to adjust the fit of the upper around the foot. A bottom portion of the upper proximate a bottom surface of the foot is attached to the sole structure.

[0003] The sole structure includes different components arranged in layers and interfacing between the ground and the upper. At the bottom layer of the sole structure is an outsole of the sole structure, which provides wear resistance and adhesion to the ground, which can be formed of rubber or other suitable materials. Above the outsole is a midsole of the sole structure, which provides cushioning, rebound to the foot, and is at least partially formed of a polymer foam material that deforms upon the foot exerting pressure thereon to achieve cushioning to the foot by attenuating the reaction force of the ground to the foot. An upper side surface of the midsole can define a footbed, which can be profiled to conform to the profile of the bottom surface of the foot. The sole structure can also include an insole or sockliner for improved comfort, which is fixedly or detachably attached to the upper side surface of the midsole and located in the shoe cavity defined by the midsole and the upper.

[0004] In actual use scenarios, the sole is required to provide good rebound in normal walking and running, but also to provide good support in the process of turning and leaning during intense exercise. The current sole generally uses a polymer foam material for support, and the overall performance is uniform, which cannot provide such different functions in different exercise scenarios. SUMMARY

[0005] The present application aims to overcome the above-mentioned defects or problems existing in the background art, and provide a rebound and torsion-resistant shoe sole and shoe, which can provide good rebound performance and torsion resistance.

[0006] To achieve the above-mentioned purpose, the present application adopts the following technical solutions: Technical Solution 1: A rebound and torsion-resistant shoe sole, comprising: a first midsole having a heel portion corresponding to the heel region of the foot; the front end of the heel portion extending forward to form a first wing and a second wing spaced apart along the width direction, the first wing being located on the lateral side of the foot and extending forward to the front end of the sole, the second wing being located on the medial side of the foot and extending forward to the region corresponding to the medial metatarsal bone of the foot; the rear end of the heel portion extending forward to form a third wing and a fourth wing spaced along the width direction, the third wing being located on the lateral side of the foot and above the first wing, and the front end of the third wing connecting to the first wing corresponding to the lateral metatarsal bone of the foot. The location of the bone region; the fourth wing is located on the inner side of the foot and above the second wing, and the front end of the fourth wing is connected to the second wing and is flush with the front end of the third wing in the front-rear direction; the second midsole has a support portion corresponding to the forefoot region and the arch region of the foot, and a footbed portion is provided above the support portion; the support portion is embedded between the first wing and the second wing in the first midsole, and the footbed portion is embedded between the third wing and the fourth wing in the first midsole to form the sole; the rebound rate of the second midsole is higher than that of the first midsole, and the shock absorption G-value of the first midsole is lower than that of the second midsole.

[0007] Technical Solution 2 based on Technical Solution 1: The front end of the first wing bends and extends toward the inner foot side to at least correspond to the anterior edge region of the sole.

[0008] Technical Solution 3 based on Technical Solution 1: The third wing is a plate-shaped part that extends obliquely from the inner foot side to the outer foot side relative to the horizontal reference plane; the fourth wing is a plate-shaped part that extends obliquely from the outer foot side to the inner foot side relative to the horizontal reference plane.

[0009] Technical Solution 4 based on Technical Solution 3: A first through hole is formed between the third wing and the first wing and the heel portion, extending through the width direction; a second through hole is formed between the fourth wing and the second wing and the heel portion, extending through the width direction; the first through hole and the second through hole are spindle-shaped on the projection plane perpendicular to the width direction.

[0010] Technical Solution 5 based on Technical Solution 4: The projection shapes of the first through hole and the second through hole on the projection plane perpendicular to the width direction coincide.

[0011] Technical Solution Six based on Technical Solution Five: The inner wall of the first through hole gradually expands from the inner foot side to the outer foot side; the inner wall of the second through hole gradually expands from the outer foot side to the inner foot side.

[0012] Technical solution seven based on technical solution one: The first wing and the second wing are provided with a plurality of downwardly recessed slots arranged along the length direction and extending along the width direction in the region near the heel.

[0013] Technical solution eight based on technical solution one: The second midsole further includes a filling part, which is located between the support part and the footbed part and corresponds to the arch area of ​​the foot. The rear surface of the filling part cooperates with the lower surface of the footbed part and the upper surface of the heel part to form a third through hole that runs through the width direction.

[0014] Technical solution nine based on technical solution eight: The front end of the heel portion is provided with a first transition surface that extends obliquely from bottom to top and from front to back between the first wing portion and the second wing portion; the support portion is provided with a second transition surface that is adapted to the shape and size of the first transition surface; the rear surface of the filling portion is connected to the second transition surface; the first transition surface is in contact with the second transition surface when the second midsole is embedded in the first midsole.

[0015] In addition, the present invention also provides technical solution ten: a shoe, comprising an upper and a resilient anti-torsion sole as described in any one of technical solutions one to nine, wherein the upper is attached to the sole. As can be seen from the above description of the present invention, compared with the prior art, the present invention has the following beneficial effects: Technical Solution 1 provides a rebound and torsional rigidity sole, comprising a first midsole and a second midsole. The first midsole has a lower shock absorption G-value, indicating better shock absorption performance, while the second midsole has a higher rebound rate, indicating better rebound performance. Through the difference in their physical properties, the first midsole serves as a rigid base, while the second midsole acts as a rebound core. However, the first midsole in this solution does not employ a conventional flat or basin-shaped structure; instead, it extends forward from the heel to form first to fourth wings that are spatially layered and separated internally and externally. This structure forms a three-dimensional cage-like skeleton. This cage-like skeleton is not a completely closed second midsole with better rebound performance. Instead, it is arranged vertically with the first and second wings and the third and fourth wings spaced apart. The third and fourth wings are only connected by a cantilever at the heel and extended and fixed from the front end. This gives the second midsole limited lateral constraint and allows controlled elastic deformation of the second midsole in the gap area between the wings. When the foot touches the ground and is compressed, the second midsole compresses and absorbs the impact in the vertical direction and uses its own deformation rebound to provide propulsion. At this time, the split wing structure does not hinder the vertical compression stroke. When the foot is subjected to lateral shear force or torsional force, the rigid wings distributed vertically limit the excessive shear deformation of the second midsole through their high elastic modulus characteristics, forming a torsional truss effect. Conventional shoe sole structures use a hard outer shell to fully enclose a soft inner core. While this solves the lateral support problem, the completely enclosed soft material cannot expand laterally under pressure, causing its equivalent stiffness in the vertical direction to increase sharply, thus losing its original high rebound characteristics.

[0016] Furthermore, the highly resilient second midsole fills the space between the wings of the first midsole, acting as a supporting medium for the rigid framework and preventing the slender wing structure from buckling and becoming unstable under stress. Conversely, the rigid wings, as a load-bearing framework, regulate the deformation path of the soft material. This structure allows the sole to exhibit the low stiffness and high rebound characteristics of the second midsole in the vertical direction, while exhibiting the high stiffness and strong support characteristics of the first midsole in the lateral and torsional directions, thus balancing the sole's rebound and torsional resistance.

[0017] In technical solution two, the front end of the first wing is designed to bend inward toward the foot and extend to the front edge of the sole, forming a forward hook-shaped enclosure. This not only provides physical restraint for the front end of the embedded second midsole, preventing the soft material from creeping or separating after long-term stress, but also the bending path matches the natural internal rotation trajectory of the metatarsophalangeal joint when pushing off the ground, providing necessary lateral rigid support in the final stage of toe liftoff.

[0018] In technical solution three, the third and fourth wings are designed to slope outwards and inwards respectively, allowing the upper surfaces of the third and fourth wings to cooperate with the second midsole to support the foot. This slope also provides the third and fourth wings with better torsional resistance, preventing unexpected excessive deformation when the sole bends. Simultaneously, this sloped structure locks the second midsole inside the first midsole, improving the stability of the connection between the two midsoles.

[0019] In technical solution four, first and second through holes are provided. These two through holes allow the third and fourth wings to have a certain deformation range under pressure, while also providing lateral deformation space for the second insole. This allows the second insole to bulge slightly outward upon impact, thus maintaining the linear resilience of the material. Furthermore, compared to conventional rectangular or circular openings, the spindle-shaped opening structure avoids stress concentration at the opening edges and provides greater deformation release space along its length.

[0020] In technical solution five, the projected shapes of the first and second through holes are made to overlap, and their shapes, sizes and positions are roughly the same, which can provide roughly the same anti-torsion and rebound characteristics to both sides of the sole width direction.

[0021] In technical solution six, the inner walls of the first and second through holes are designed as a flared shape that gradually widens from the inside out. Combined with the inclined shape of the third and fourth wings, this design defines a structure where the upper and lower surfaces of the third and fourth wings are roughly parallel, ensuring excellent torsional resistance. Furthermore, this flared shape provides a gradually increasing deformation range towards the outside when the edges of the sole are compressed. In rapid changes of direction and lateral tilting movements, it can absorb lateral impact in the initial stage of contact with the ground and provide solid anti-rollover support in the later stages of compression, preventing ankle instability caused by sudden changes in edge stiffness.

[0022] In technical solution seven, grooves are provided near the heel of the first and second wings. The grooves improve the bending performance of the first midsole, prevent the first midsole from being too hard and causing the sole to roll naturally in accordance with the deformation of the foot, and may also allow for slight elastic deformation to assist in shock absorption.

[0023] In technical solution eight, a filling part is provided in the second midsole, and a third through hole is formed between the filling part and the heel part. The filling part can increase the contact area between the second midsole and the first midsole in the thickness direction, thereby improving the support of the first midsole for the second midsole. At the same time, the formed third through hole weakens the torsional section modulus at the heel position, allowing the sole to generate a moderate degree of independent torsional freedom between the forefoot and the heel, thus improving the comfort of the movement.

[0024] In technical solution nine, a first and second transition surface is set at an angle to avoid stress concentration at the contact point between the first and second midsoles. The angled contact surface allows the sole to convert some of the horizontal component of the force into a vertical compressive force when subjected to forward shear force, thereby improving the connection strength between the first and second midsoles.

[0025] Technical solution ten provides a shoe that, due to the use of the aforementioned rebound and torsion-resistant sole, can simultaneously provide good rebound and torsion resistance. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments are briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is an exploded view of the structure of the rebound anti-torsion sole according to an embodiment of the present invention. Figure 1 ; Figure 2 This is an exploded view of the structure of the rebound anti-torsion sole according to an embodiment of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the structure of the rebound anti-torsion sole according to an embodiment of the present invention. Figure 1 ; Figure 4 This is a schematic diagram of the structure of the rebound anti-torsion sole according to an embodiment of the present invention. Figure 2 .

[0028] Explanation of key figure labels: First midsole 100; heel portion 110; first transition surface 111; first wing portion 120; first wing portion bending section 121; second wing portion 130; third wing portion 140; fourth wing portion 150; first through hole 161; second through hole 162; through hole inner wall 163; slot 170; Second midsole 200; support portion 210; second transition surface 211; footbed portion 220; filling portion 230; third through hole 240; The base price is 300. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are preferred embodiments of the present invention and should not be considered as excluding other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0030] Unless otherwise expressly defined, the use of terms such as "first," "second," or "third" in the claims, description, and accompanying drawings of this invention is for distinguishing different objects and not for describing a specific order.

[0031] 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.

[0032] 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.

[0033] 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."

[0034] Example This invention relates to a shoe, which includes an upper and a resilient torsion-resistant sole as described in this invention, the upper being attached to the sole.

[0035] The upper of the shoe can be made of fabric, leather, synthetic leather, or a combination thereof. The upper can be a one-piece woven sock-like structure or a structure made of multiple pieces of material. The upper typically features eyelets and laces, or fasteners such as Velcro or screw-on lacing systems, for adjusting the tightness between the upper and the foot. The bottom edge of the upper is fixedly connected to the upper surface of the sole structure (i.e., the upper surface of the assembly formed by the first midsole 100 and the second midsole 200) by means of adhesive bonding, stitching, or injection molding.

[0036] Furthermore, the sole of this shoe is divided along its length into a forefoot region, an arch region, and a heel region, corresponding to the foot's structure. It should be understood that this division is for ease of description of the technical solution of this invention, and not precise physical boundaries. These regions are smoothly transitioned, and there are no strict dividing lines between adjacent regions. Moreover, the terms forefoot region, arch region, and heel region apply not only to the sole but also to the upper, outsole 300, midsole, and the entire footwear structure corresponding to these regions. Specifically, the forefoot region roughly corresponds to the toes and metatarsal bones of the foot, the arch region roughly corresponds to the navicular and cuneiform bones of the foot, and the heel region roughly corresponds to the calcaneus of the foot.

[0037] Reference Figure 1 and Figure 2 It illustrates the explosion state of the rebound anti-torsion sole involved in the embodiments of the present invention, with reference to Figure 3 and Figure 4 This illustrates the assembly state of the resilient torsion-resistant shoe sole involved in the embodiments of the present invention.

[0038] The first midsole 100 has a heel portion 110 corresponding to the heel area of ​​the foot. The front end of the heel portion 110 extends forward to form a first wing portion 120 and a second wing portion 130 arranged at intervals along the width direction. The first wing portion 120 is located on the outer foot side and extends forward to the front end of the sole. The second wing portion 130 is located on the inner foot side and extends forward to the metatarsal area corresponding to the inner foot side of the foot. The rear end of the heel portion 110 extends forward to form a third wing portion 140 and a fourth wing portion 150 arranged along the width direction. The third wing portion 140 is located on the outer foot side and above the first wing portion 120. The front end of the third wing portion 140 is connected to the position of the first wing portion 120 corresponding to the metatarsal area of ​​the outer foot side of the foot. The fourth wing portion 150 is located on the inner foot side and above the second wing portion 130. The front end of the fourth wing portion 150 is connected to the second wing portion 130 and is flush with the front end of the third wing portion 140 in the front-back direction.

[0039] Specifically, the first midsole 100 is an integrally molded component, which has a heel portion 110. The heel portion 110 has a certain thickness, width, and length, and its range is roughly equivalent to the heel area of ​​the sole. The bottom surface of the heel portion 110 has a rearward and upward sloping structure, so that the heel portion 110 as a whole forms a rearward and upward sloping extension structure. Therefore, the rear end of the heel portion 110 is higher than the front end of the heel portion 110.

[0040] The first wing 120 begins from the outer side of the front end of the heel portion 110 and extends in a long strip along the outer edge of the sole, its extension path passing through the outer side of the arch and the outer side of the forefoot, until it reaches the toe area at the very front of the sole. The second wing 130 begins from the inner side of the front end of the heel portion 110 and extends forward along the inner side of the arch. Its length is shorter than that of the first wing 120, and its front end terminates at the mid-forward part of the length direction of the first midsole 100, roughly corresponding to the area behind the head of the first metatarsal on the sole. Thus, a gap is formed between the first wing 120 and the second wing 130.

[0041] The third wing 140 originates from the outer side of the rear end of the heel portion 110 and extends forward in a cantilever beam shape. Vertically, it is suspended above the first wing 120 and forms a hollow gap between them, until the front end of the third wing 140 gradually bends downward and fuses with the upper surface of the first wing 120. The fourth wing 150 originates from the inner side of the rear end of the heel portion 110 and extends forward in a cantilever beam shape. Vertically, it is suspended above the second wing 130 and forms a hollow gap between them, until the front end of the fourth wing 150 gradually bends downward and fuses with the upper surface of the front end of the second wing 130.

[0042] The connection points of the third wing 140 and the first wing 120, and the connection points of the fourth wing 150 and the second wing 130, are roughly aligned along the front-to-back length of the sole. Furthermore, in this text, the inner foot side refers to the side of the sole facing the other foot when worn, and the outer foot side refers to the side of the sole facing away from the other foot when worn.

[0043] Reference Figure 1 and Figure 2 The front end of the first wing 120 bends and extends towards the inward side of the foot to at least correspond to the front edge region of the sole. Specifically, the main body of the first wing 120 extends along the outer edge of the sole to the toe position, but does not terminate there. Instead, it bends inward towards the inward side following the arcuate contour of the front edge of the sole. This bend is an arc-shaped strip that spans the entire front area of ​​the toe in the width direction and covers the outer edge of the front of the second midsole 200, thus forming the first wing bend segment 121. The end of the first wing bend segment 121 terminates at the inward side of the front of the sole, so that the first wing 120 as a whole presents an inwardly hooked or hook-shaped structure in a top view, which constitutes the solid boundary of the foremost part of the sole.

[0044] Reference Figure 1 and Figure 2 The third wing 140 is a plate-shaped part that extends obliquely from the inner foot side to the outer foot side relative to the horizontal reference plane; the fourth wing 150 is a plate-shaped part that extends obliquely from the outer foot side to the inner foot side relative to the horizontal reference plane.

[0045] Furthermore, a first through hole 161 is formed between the third wing 140 and the first wing 120 and the heel 110, extending through the width direction; a second through hole 162 is formed between the fourth wing 150 and the second wing 130 and the heel 110, extending through the width direction; the first through hole 161 and the second through hole 162 are spindle-shaped on the projection plane perpendicular to the width direction.

[0046] Specifically, the third wing 140 is not a vertically or horizontally positioned baffle, but rather an inclined plate structure with a predetermined thickness. In a cross-section perpendicular to the front-rear direction, the plate of the third wing 140 is inclined relative to the horizontal reference plane. Specifically, the inclination direction starts from the inner edge of the third wing 140 and extends outwards while gradually increasing in height, so that the outer edge of the third wing 140 is vertically higher than its inner edge. Correspondingly, the fourth wing 150 is also an inclined plate structure, its inclination direction mirroring that of the third wing 140. That is, starting from the outer edge of the fourth wing 150, it extends inwards while gradually increasing in height, so that the inner edge of the fourth wing 150 is vertically higher than its outer edge. Thus, the third wing 140 and the fourth wing 150 together spatially construct a support structure with a roughly V-shaped cross-section, a wide upper opening, and a narrowing lower section.

[0047] The first through hole 161 is a lateral openwork area formed by the lower surface of the third wing 140, the upper surface of the first wing 120, and the front face of the heel portion 110. Because the third wing 140 extends cantilevered from back to front, and its front end gradually curves downward until it merges with the first wing 120, the diameter height of the first through hole 161 changes along its length in the vertical direction: starting near the rear end of the heel portion 110, the diameter height gradually increases to a peak, then gradually decreases towards the front until it closes. This height change causes the first through hole 161 to present a spindle shape with tapered ends and a wide middle on a side view projection plane perpendicular to the width direction. Similarly, the second through hole 162 is located on the inner foot side and is defined by the lower surface of the fourth wing 150, the upper surface of the second wing 130, and the heel portion 110. It also presents a spindle-shaped profile with narrowed ends and a widened middle on a side view projection plane.

[0048] The projection shapes of the first through hole 161 and the second through hole 162 coincide on the projection plane perpendicular to the width direction. Specifically, the first through hole 161 is located on the outer side of the sole, and the second through hole 162 is located on the inner side of the sole. Although they are located on opposite sides of the sole width, their distribution positions and spans along the sole length direction are basically the same. That is, the rear end edge of the first through hole 161 (the end near the heel 110) is aligned with the rear end edge of the second through hole 162 in the length direction, and the front end edge of the first through hole 161 is also aligned with the front end edge of the second through hole 162 in the length direction. Meanwhile, the aperture size and opening trend of the first through hole 161 and the second through hole 162 in the vertical height direction are also consistent. That is, the change in the distance between the third wing 140, which forms the upper boundary of the first through hole 161, and the first wing 120, which forms the lower boundary, corresponds structurally to the change in the distance between the fourth wing 150, which forms the upper boundary of the second through hole 162, and the second wing 130, which forms the lower boundary. Therefore, when a plane perpendicular to the width direction of the sole is used as the projection plane, the outlines of the through holes on both sides can overlap and match each other.

[0049] Furthermore, the inner wall of the first through hole 161 gradually widens from the inner foot side to the outer foot side; the inner wall of the second through hole 162 gradually widens from the outer foot side to the inner foot side. Specifically, for the first through hole 161, its upper boundary is mainly defined by the lower surface of the third wing 140, and its lower boundary is mainly defined by the upper surface of the first wing 120. The lower surface of the third wing 140 gradually slopes upwards from the inside to the outside along the width direction (i.e., from the side closest to the center line of the sole towards the outer foot edge), and / or the upper surface of the first wing 120 gradually slopes downwards from the inside to the outside along the width direction, so that the vertical distance between the third wing 140 and the first wing 120 gradually increases along the direction pointing towards the outer foot side. Thus, the longitudinal section of the first through hole 161 exhibits a structure that is wider on the outside and narrower on the inside, making the outer opening size of the first through hole 161 larger than its inner depth size.

[0050] Similarly, for the second through hole 162, the lower surface of the fourth wing 150 forming its upper boundary and the upper surface of the second wing 130 forming its lower boundary gradually move away from each other (i.e., the vertical distance gradually increases) in the direction from the side closest to the center line of the sole towards the inner edge of the foot. This results in the second through hole 162 also exhibiting a flared shape that gradually widens towards the edge of the sole in its longitudinal cross-section. This structural design, which is narrower inside and wider outside, makes the inner wall of the through hole not perpendicular to the horizontal plane, but rather forms a sloped surface with a certain gradient.

[0051] In addition, refer to Figure 1 and Figure 2The first wing portion 120 and the second wing portion 130 have several downwardly recessed slots 170 arranged along the length direction and extending along the width direction in the area near the heel portion 110. Specifically, the slots 170 are located before the junction of the first wing portion 120 and the second wing portion 130 with the heel portion 110, and each slot 170 is a strip-shaped notch formed by a vertical downward indentation from the upper surface of the first wing portion 120 or the second wing portion 130. The length direction of these strip-shaped notches is approximately parallel to the width direction of the sole, that is, they cut laterally into the wing portion. The multiple slots 170 are arranged sequentially at intervals along the front-to-back length direction of the sole, so that the first wing portion 120 and the second wing portion 130 in this area have a comb-like or wavy structure.

[0052] Reference Figure 1 and Figure 2 The sole also includes a second midsole 200, which has a support portion 210 corresponding to the forefoot area and arch area of ​​the foot, and a footbed portion 220 above the support portion 210; the support portion 210 is embedded between the first wing portion 120 and the second wing portion 130 in the first midsole 100, and the footbed portion 220 is embedded between the third wing portion 140 and the fourth wing portion 150 in the first midsole 100 to form the sole.

[0053] The second midsole 200 also includes a filling portion 230, which is located between the support portion 210 and the footbed portion 220 and corresponds to the arch area of ​​the foot. The rear surface of the filling portion 230, together with the lower surface of the footbed portion 220 and the upper surface of the heel portion 110, forms a third through hole 240 that extends in the width direction.

[0054] Specifically, the second midsole 200 is constructed as a one-piece molded elastic soft component. The support portion 210 constitutes the lower half of the second midsole 200, and its shape and size are configured to tightly fill the receiving space between the first wing 120 and the second wing 130 of the first midsole 100. The footbed portion 220 constitutes the upper half of the second midsole 200, and its shape and size are configured to tightly fill the receiving space between the third wing 140 and the fourth wing 150 of the first midsole 100, with the upper surface of the footbed portion 220 forming a bearing surface for directly supporting the foot or insole. The filling portion 230 is located in the middle section of the second midsole 200 (corresponding to the arch area), and it connects the support portion 210 and the footbed portion 220 in the vertical direction.

[0055] In the rearward extension direction, the rear end of the footbed portion 220 extends beyond the rear end of the filling portion 230, leaving the lower rear surface of the footbed portion 220 suspended. When the second midsole 200 is assembled to the first midsole 100, the suspended lower surface of the footbed portion 220 covers the front end of the heel portion 110 of the first midsole 100, while a gap remains between the rear side surface of the filling portion 230 and the structure of the heel portion 110. Thus, the rear side surface of the filling portion 230 (serving as the front wall of the hole), the lower side surface of the footbed portion 220 (serving as the top wall of the hole), and the upper side surface of the heel portion 110 of the first midsole 100 (serving as the bottom wall of the hole) together define the third through hole 240. This third through hole 240 is a channel that runs completely through the left and right sides along the width direction of the sole.

[0056] Furthermore, the heel portion 110 has a first transition surface 111 extending obliquely from bottom to top and from front to back between the first wing portion 120 and the second wing portion 130; the support portion 210 has a second transition surface 211 that matches the shape and size of the first transition surface 111, and the rear surface of the filling portion 230 connects with the second transition surface 211; the first transition surface 111 abuts against the second transition surface 211 when the second midsole 200 is embedded in the first midsole 100. Specifically, the first transition surface 111 is located in the central region of the front end of the bottom wall of the heel portion 110 of the first midsole 100, specifically between the root of the first wing portion 120 and the second wing portion 130. The first transition surface 111 is constructed as a sloping surface facing forward and upward, with its lower edge positioned forward and its upper edge positioned backward, thereby forming a wedge-shaped profile in the longitudinal section. Correspondingly, the support portion 210 of the second midsole 200 (i.e., the portion embedded in the lower layer) has an inclined bottom surface at its rear end that is complementary to the angle of the ramp surface, namely the second transition surface 211. The second transition surface 211 faces rearward and downward. The rear surface of the filling portion 230 (i.e., the generally vertical surface defining the front boundary of the third through hole 240) is connected to the top of the second transition surface 211 and extends upward from the top to the footbed portion 220. When the second midsole 200 is embedded in the first midsole 100, the second transition surface 211 covers and presses against the first transition surface 111, and the inclined surfaces of the two are spatially parallel and closely fitted.

[0057] Furthermore, in this outsole, the second midsole 200 has a higher rebound rate than the first midsole 100, while the first midsole 100 has a lower shock absorption G-value than the second midsole 200. Specifically, the first midsole 100, as the rigid skeleton of the outsole, mainly provides structural support and prevents excessive torsion. It is preferably made of a polymer material with relatively high hardness and density. For example, the first midsole 100 can be made of ethylene-vinyl acetate copolymer (EVA), thermoplastic polyurethane (TPU), or nylon elastomer with a hardness between 55 and 65 degrees. Correspondingly, the second midsole 200, as the cushioning core of the outsole, mainly provides a comfortable feel and energy return during exercise. It is preferably made of a supercritical foam material with relatively low hardness and excellent rebound performance. For example, the second midsole 200 can be made of supercritical foamed EVA, foamed thermoplastic polyurethane (E-TPU), or polyether block amide (PEBA) foam material with a hardness between 40 and 50 degrees.

[0058] By selecting and combining the above materials, the rebound rate of the second midsole 200 is significantly higher than that of the first midsole 100, thus providing a noticeable propulsive feel when the foot pushes off the ground; at the same time, by utilizing the relatively high structural rigidity of the first midsole 100, its shock absorption stability index is better than that of the second midsole 200, ensuring that the sole structure does not collapse under severe impact.

[0059] This invention relates to a rebound and torsional rigidity sole, comprising a first midsole 100 and a second midsole 200. The first midsole 100 has a lower shock absorption G-value, indicating better shock absorption performance, while the second midsole 200 has a higher rebound rate, indicating better rebound performance. Through the difference in their physical properties, the first midsole 100 serves as a rigid base, while the second midsole 200 serves as a rebound core. However, the first midsole 100 in this design does not employ a conventional flat or basin-shaped structure. Instead, it extends forward from the heel portion 110 to form first to fourth wing portions 150 that are spatially layered and separated internally and externally. This structure forms a three-dimensional cage-like skeleton. This cage-like skeleton does not completely enclose the second midsole 200, which has better rebound performance. Instead, it is arranged vertically with the first and second wings and the third and fourth wings spaced apart. The third and fourth wings are only connected by a cantilever of the heel part 110 and extended and fixed from the front end. This gives the second midsole 200 limited lateral constraint and allows the second midsole 200 to undergo controlled elastic deformation in the gap area between the wings. When the foot touches the ground and is compressed, the second midsole 200 compresses and absorbs the impact in the vertical direction and uses its own deformation rebound to provide propulsion. At this time, the split wing structure does not hinder the vertical compression stroke. When the foot is subjected to lateral shear force or torsional force, the rigid wings distributed vertically limit the excessive shear deformation of the second midsole 200 through their high elastic modulus characteristics, forming a torsional truss effect. Conventional shoe sole structures use a hard outer shell to fully enclose a soft inner core. While this solves the lateral support problem, the completely enclosed soft material cannot expand laterally under pressure, causing its equivalent stiffness in the vertical direction to increase sharply, thus losing its original high rebound characteristics.

[0060] The foregoing description of the specifications and embodiments is intended to explain the scope of protection of this invention, but does not constitute a limitation on the scope of protection of this invention. Modifications, equivalent substitutions, or other improvements to the embodiments of this invention or a portion thereof that can be obtained by those skilled in the art through logical analysis, reasoning, or limited experimentation, based on the teachings of this invention or the foregoing embodiments, in conjunction with common knowledge, general technical knowledge, and / or existing technology, should all be included within the scope of protection of this invention.

Claims

1. A resilient, torsion-resistant shoe sole, characterized in that, include: A first midsole (100) has a heel portion (110) corresponding to the heel area of ​​the foot; the front end of the heel portion (110) extends forward to form a first wing portion (120) and a second wing portion (130) arranged at intervals along the width direction, the first wing portion (120) is located on the outer foot side and extends forward to the front end of the sole, and the second wing portion (130) is located on the inner foot side and extends forward to the metatarsal area corresponding to the inner foot side of the foot. The rear end of the heel portion (110) extends forward to form a third wing portion (140) and a fourth wing portion (150) arranged in the width direction. The third wing portion (140) is located on the outer foot side and above the first wing portion (120), and the front end of the third wing portion (140) is connected to the first wing portion (120) at a position corresponding to the metatarsal region on the outer foot side of the sole. The fourth wing portion (150) is located on the inner foot side and above the second wing portion (130), and the front end of the fourth wing portion (150) is connected to the second wing portion (130) and is flush with the front end of the third wing portion (140) in the front-back direction. The second midsole (200) has a support portion (210) corresponding to the forefoot area and arch area of ​​the foot, and a footbed portion (220) is provided above the support portion (210); the support portion (210) is embedded between the first wing portion (120) and the second wing portion (130) in the first midsole (100), and the footbed portion (220) is embedded between the third wing portion (140) and the fourth wing portion (150) in the first midsole (100) to form the sole; The second midsole (200) has a higher rebound rate than the first midsole (100), and the first midsole (100) has a lower shock absorption G value than the second midsole (200).

2. The resilient anti-torsion sole as described in claim 1, characterized in that, The front end of the first wing (120) bends and extends toward the inner foot side to at least correspond to the anterior edge region of the sole.

3. The resilient anti-torsion sole as described in claim 1, characterized in that, The third wing (140) is a plate-shaped part that extends obliquely from the inner foot side to the outer foot side relative to the horizontal reference plane; the fourth wing (150) is a plate-shaped part that extends obliquely from the outer foot side to the inner foot side relative to the horizontal reference plane.

4. The resilient anti-torsion sole as described in claim 3, characterized in that, A first through hole (161) is formed between the third wing (140), the first wing (120), and the heel (110) in the width direction; a second through hole (162) is formed between the fourth wing (150), the second wing (130), and the heel (110) in the width direction; the first through hole (161) and the second through hole (162) are spindle-shaped on the projection plane perpendicular to the width direction.

5. The resilient anti-torsion sole as described in claim 4, characterized in that, The projection shapes of the first through hole (161) and the second through hole (162) on the projection plane perpendicular to the width direction coincide.

6. The resilient anti-torsion sole as described in claim 5, characterized in that, The inner wall of the first through hole (161) gradually expands from the inner foot side to the outer foot side; the inner wall of the second through hole (162) gradually expands from the outer foot side to the inner foot side.

7. The resilient anti-torsion sole as described in claim 1, characterized in that, The first wing (120) and the second wing (130) have a plurality of downwardly recessed slots (170) arranged along the length direction and extending along the width direction in the region near the heel portion (110).

8. The resilient anti-torsion sole as described in claim 1, characterized in that, The second midsole (200) also includes a filling portion (230), which is located between the support portion (210) and the footbed portion (220) and corresponds to the arch area of ​​the foot. The rear surface of the filling portion (230) cooperates with the lower surface of the footbed portion (220) and the upper surface of the heel portion (110) to form a third through hole (240) that extends in the width direction.

9. A resilient anti-torsion sole as described in claim 8, characterized in that, The front end of the heel portion (110) is provided with a first transition surface (111) that extends obliquely from bottom to top and from front to back between the first wing portion (120) and the second wing portion (130); the support portion (210) is provided with a second transition surface (211) that is adapted to the shape and size of the first transition surface (111); the rear surface of the filling portion (230) is connected to the second transition surface (211); the first transition surface (111) is in contact with the second transition surface (211) when the second midsole (200) is embedded in the first midsole (100).

10. A shoe comprising an upper, characterized in that, It includes a resilient torsion-resistant sole as described in any one of claims 1-9, wherein the upper is attached to the sole.

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