High-stability shoe sole and shoe product

Abstract

The invention discloses a high-stability sole and a footwear product, the sole comprises a midsole and an outsole, the midsole comprises a base part and a first side wall, the outsole is fixedly compounded below the midsole and comprises at least a first part and a second part which are mutually separated along the length direction of the sole, the first part corresponds to the half sole part of the sole, and the second part corresponds to the half sole part of the sole. The second part corresponds to the arch part and the heel part of the sole; each of the first part and the second part comprises a bottom supporting part and a second side wall; the second side wall is compounded on the outer side of the first side wall at the corresponding position; wherein the hardness of the first material is higher than that of the second material; the same cross section position of the upper edge of the first side wall in the length direction of the sole is located above the upper edge of the second side wall. The shoe sole adopting the technical scheme can solve the problem that the shoe sole in the prior art is difficult to give consideration to and balance the supporting stability and the flexibility.

Description

Technical Field

[0001] The present invention relates to the technical field of soles, and in particular to a sole and a footwear product with high stability. Background Art

[0002] The toddler stage is a critical period for the development of a child's foot bones and walking posture. The performance of toddler shoes is crucial to the healthy development of a child's feet. Currently, there are various technical solutions for the structure and material selection of toddler shoe soles on the market, but there are still some shortcomings.

[0003] A common solution is to use a single material to make the sole, such as natural rubber, ethylene-vinyl acetate copolymer (EVA) or soft leather. Among them, the soles made of natural rubber as the main material, although they have good wear resistance, usually have the defects of excessive structural rigidity, excessive overall weight and single functional zoning. This overly rigid and heavy structure will hinder the natural bending of children's feet when walking, increasing the burden of walking. On the contrary, if overly soft materials such as EVA or soft leather are used, although flexibility and lightness are improved, long-term use will lead to a decrease in children's foot control due to insufficient support, and may even have a negative impact on the healthy development of the leg shape and spine.

[0004] Therefore, the existing technology for learning to walk shoes still has problems with balancing support stability, flexibility, and balance. Summary of the Invention

[0005] The purpose of the present invention is to overcome the above-mentioned defects or problems existing in the background technology and to provide a high-stability sole and footwear product, which can improve the problem that the soles in the prior art are difficult to balance in terms of support stability, flexibility and balance.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] Technical Solution 1: A high-stability sole, comprising: a midsole, which is made of a first material and has a base extending in a reference plane, and a first side wall extending upward from the periphery of the base and surrounding the front, rear and sides of the base; an outsole, which is made of a second material and fixedly compounded to the bottom of the midsole; the outsole comprises at least two first parts and a second part separated from each other along the length direction of the sole, the first part corresponds to the forefoot part of the sole, and the second part corresponds to the arch part and heel part of the sole; the first part and the second part both include a supporting bottom part extending parallel to the base, and second side walls extending upward from the periphery of the respective supporting bottom parts at the front and both sides of the first part and at the rear and both sides of the second part; the second side wall is compounded to the outside of the first side wall at the corresponding position; wherein the hardness of the first material is higher than that of the second material; the upper edge of the first side wall is located above the upper edge of the second side wall at the same cross-sectional position in the length direction of the sole.

[0008] Technical solution 2 based on technical solution 1: the second part also includes at least two third parts and a fourth part separated from each other along the length direction of the sole, the third part corresponds to the arch part of the sole, and the fourth part corresponds to the heel part of the sole; the second side walls are provided on both sides of the third part and the rear and both sides of the fourth part.

[0009] Technical solution three based on technical solution two: the part of the first side wall located on both sides forms at least two first bending portions connected to each other from front to back, and the upper edge of the first bending portion is an arc shape that bulges upward relative to the base; at least one first bending portion corresponds to the first part of the outsole, and at least another first bending portion corresponds to the second part of the outsole.

[0010] Technical solution four based on technical solution three: the parts of the first side wall located on both sides form three mutually connected first bending parts from front to back; the first part, third part, and fourth part of the outsole respectively correspond to one of the first bending parts from front to back, and the second side walls of the first part, third part, and fourth part are respectively provided with a second bending part corresponding to the shape of the first bending part at the upper edge.

[0011] Technical solution five based on technical solution four: the front portion of the first side wall is folded upward and backward; the rear portion of the first side wall is extended upward and backward at an angle.

[0012] Technical solution 6 based on technical solution 5: the upper edges of the front and rear portions of the first side wall and the second side wall are higher than the portions located on both sides.

[0013] Technical Solution 7 based on Technical Solution 1: The outer surface of the first side wall is protruded with a ridge that extends around and overlaps the upper edge of the second side wall.

[0014] Technical Solution 8 based on Technical Solution 2: The separation interfaces between the first part, the third part, and the fourth part relative to each other in the front-to-back direction extend along the width direction of the sole and are in the shape of a curved smooth arc.

[0015] Technical solution nine based on technical solution eight: the supporting bottom portion of the third part includes a base portion and a protruding portion; the protruding portion is formed by the base portion close to the inner foot side of the sole, extending obliquely toward the rear end and outer foot side of the sole; the base portion and the protruding portion cooperate in the width direction of the sole to define a longitudinal groove extending obliquely from the inner foot side of the sole toward the rear end and outer foot side of the sole.

[0016] Technical Solution 10: A footwear product comprising an upper and a high-stability sole as described in any one of Technical Solutions 1 to 9, wherein the upper is composited with the sole.

[0017] From the above description of the present invention, it can be seen that compared with the prior art, the present invention has the following beneficial effects:

[0018] Technical Solution 1 provides a highly stable sole comprising a midsole and an outsole. The midsole is made of a first material with a relatively high hardness and includes a base and a first sidewall. The midsole, leveraging the inherent rigidity of the material and the containment design of the first sidewall, forms a three-dimensional frame that surrounds and accommodates the foot. When the foot tilts or twists laterally during movement, this rigid frame structure provides effective physical resistance, thereby limiting excessive displacement and providing stable support. Furthermore, because the foot is contained within the three-dimensional frame formed by the midsole, rather than being restricted by the upper, the base of the midsole can be designed to be thinner, thereby enhancing the foot's perception of the ground and better receiving ground feedback, thus aiding children in learning to walk. Secondly, the outsole is made of a material with lower hardness and is divided into a first part and a second part. Both the first part and the second part have a support bottom and a second side wall. The support bottom is compounded below the base of the midsole and can directly contact the ground. It can provide a good ground contact feeling through its own softer material, and is more wear-resistant and non-slip. The second side wall is compounded on the outside of the first side wall. Because the foot is accommodated in the three-dimensional frame formed by the harder midsole, when the side of the sole collides with the outside, it is more likely to affect the foot inside. The softer second side wall can absorb energy and avoid a significant impact on the foot inside the sole. At the same time, because the second side wall is an integrated structure with the support bottom, it can further support the first side wall, prevent the first side wall from tilting, and better wrap the foot, thereby further improving the overall stability of the sole. The first sidewall is always higher than the second sidewall, ensuring that the first and second sections of the outsole correspond to the forefoot and the area behind the forefoot, respectively. When walking with this outsole, the sole bends in these separate sections, rather than across the entire sole, effectively improving the flexibility of the entire sole. The design of the midsole's first sidewall being consistently higher than the outsole's second sidewall at the same cross-sectional location ensures that the rigid frame's stabilizing function remains dominant, while the lower second sidewall prevents structural interference with the bending of the outsole's various sections.

[0019] In technical solution two, the second part is divided into a third part and a fourth part separated front and back, corresponding to the arch and heel respectively, so that the bending area of ​​the sole is more clear, and can adapt to different foot movements during walking, such as forefoot plantar flexion, arch support and heel landing, so that the dynamic response of the sole is more coordinated with the foot movement.

[0020] In technical solutions three and four, curved sections are incorporated on both sides of the midsole and outsole, with the upper and lower sections corresponding to each other. This curved sidewall structure better adapts to the changing shape of the foot's side during walking and bending, avoiding the localized pressure that can occur with straight sidewalls during bending, thus enhancing wearing comfort. This corresponding arrangement ensures consistent movement between the midsole and outsole during bending.

[0021] In Technical Solution 5, the front portion of the midsole's first sidewall is designed to fold upward and backward. This integrally formed fold creates a double-layered protective area at the toe box, enhancing the structural strength of this area and effectively resisting external impacts. Simultaneously, the rear portion of the first sidewall is designed to extend upward and backward. This tilt allows the inner wall of the heel cup to better conform to the rounded contour of the heel, increasing the contact area. This provides enhanced heel support and fixation, reducing the tendency for the shoe to slip during walking.

[0022] In Technical Solution 6, the front and rear portions of the first and second side walls are designed to be taller than their side counterparts. This height differentiation allows the sole's support to be distributed as needed: stronger structural support is provided at the toe, where protection is crucial, and at the heel, where stability is crucial. Meanwhile, lower side walls are used at the sides, where freedom of movement is crucial, to avoid restricting foot bending.

[0023] In technical solution seven, a ridge overlapped with the upper edge of the second side wall is provided on the outer surface of the first side wall. When the midsole and the outsole are composited into one, the ridge can transform the connection mode between the midsole and the outsole from simple plane bonding to a composite connection with bonding and mechanical interlocking. Therefore, when the second side wall is subjected to an external force intended to separate it from the first side wall, the physical constraint of the ridge converts the peeling stress into shear stress and compressive stress that the structure can more easily withstand, thereby enhancing the bonding strength between the midsole and the outsole, effectively preventing the soft outer layer from curling, degumming and other problems during use, and improving the integrity of the sole. The ridges ensure structural stability and durability. Furthermore, when the user's foot applies force to the midsole, the midsole transfers that force to the outsole. Normally, the midsole only transfers force from its base to the outsole's support. The ridges transfer the force from the midsole to the outsole's second sidewall, creating a more complete support path. The entire outsole and midsole participate in the force applied to the sole. Furthermore, the slight inward bending of the second sidewall under force further enhances the wrapping of the three-dimensional framework formed by the midsole, thereby further improving the support and stability of the entire sole. Furthermore, the ridges serve as a positional reference when the midsole and outsole are combined, defining the distance and degree of contact between the midsole's base and the outsole's support.

[0024] In Technical Solution 8, the interfaces between the separate outsole sections are designed as smooth curved lines. Compared to straight lines, this curved interface allows for a smoother transition of plantar pressure between different areas, preventing gait instability caused by sudden pressure changes during walking and making the entire gait transition from heel strike to forefoot liftoff smoother.

[0025] In Technical Solution 9, a specific plantar guidance structure is constructed by providing a base part, a protruding part, and a longitudinal groove on the outsole in the arch area. This structure utilizes the principles of human biomechanics and actively guides the distribution of plantar pressure through a physical structure with a specific three-dimensional shape. When walking, this combined structure consisting of the supporting ridge of the protruding part and the guiding channel of the longitudinal groove provides an advantageous path for the plantar pressure center to be transmitted from back to front. This effective management of dynamic force flow helps the user establish a stable gait trajectory from the outside of the heel to the inside of the forefoot, which has a positive role in promoting the formation of correct walking posture for children.

[0026] Technical solution ten provides a footwear product that uses the sole described in the above technical solution, so that it can provide the user with good support stability and flexibility when worn. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 Schematic diagram of the structure of a high-stability sole according to an embodiment of the present invention;

[0029] Figure 2 for Figure 1 A bottom-up schematic diagram of the midsole;

[0030] Figure 3 for Figure 2 Schematic diagram of the middle AA section;

[0031] Figure 4 for Figure 2 Schematic diagram of the middle BB cross section.

[0032] Description of main reference numerals:

[0033] midsole 10; base 11; first side wall 12; first front side wall 121; first side side wall 122; first rear side wall 123; first bent portion 13; ridge 14;

[0034] Outsole 20; first portion 21; second portion 22; third portion 221; fourth portion 222; supporting bottom portion 23; second side wall 24; second front side wall 241; second side side wall 242; second rear side wall 243; base portion 25; protruding portion 26; longitudinal groove 27; second bending portion 28. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are preferred embodiments of the present invention and should not be regarded as excluding other embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0036] In the claims, description and drawings of the present invention, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" is for the purpose of distinguishing different objects rather than for describing a specific order.

[0037] In the claims, specification and the above-mentioned drawings of the present invention, unless otherwise expressly defined, directional words such as the terms "center", "transverse", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the specific scope of protection of the present invention.

[0038] In the claims, description and above-mentioned drawings of the present invention, unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" should be understood in a broad sense, that is, any connection method without displacement relationship and relative rotation relationship between the two parties, that is, including non-detachable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or elements.

[0039] In the claims, description and drawings of the present invention, if the terms "include", "have" and their variations are used, they are intended to mean "including but not limited to".

[0040] Example 1

[0041] The first embodiment of the present invention relates to a high stability sole, referring to Figure 1 The sole includes a midsole 10 and an outsole 20 .

[0042] Reference Figure 1 The midsole 10 is made of a first material and has a base 11 extending in a reference plane, and a first side wall 12 extending upward from the periphery of the base 11 and surrounding the front, rear and both sides of the base 11. Figure 1 The outsole 20 is made of a second material and is fixedly compounded under the midsole 10; the outsole 20 includes at least two first parts 21 and second parts 22 separated from each other along the length direction of the sole, the first part 21 corresponds to the forefoot part of the sole, and the second part 22 corresponds to the arch part and the heel part of the sole; the first part 21 and the second part 22 both include a supporting bottom part 23 extending parallel to the base 11, and second side walls 24 extending upward from the periphery of the respective supporting bottom parts 23 at the front and both sides of the first part 21 and at the rear and both sides of the second part 22.

[0043] Among them, the second side wall 24 is compounded to the outer side of the first side wall 12 at the corresponding position; the hardness of the first material is higher than that of the second material; the upper edge of the first side wall 12 is located above the upper edge of the second side wall 24 at the same cross-sectional position in the length direction of the sole.

[0044] Specifically, in this embodiment, the midsole 10 is made of TPU material, and the outsole 20 is made of rubber material. The hardness of the midsole 10 can be within the Shore hardness range of 70±2, and the hardness of the outsole 20 can be within the Shore hardness range of 55±2. Of course, the midsole 10 and the outsole 20 can also be made of other materials as long as they meet the hardness requirements.

[0045] Specifically, the midsole 10 has a base 11 and a first side wall 12. The base 11 extends in a reference plane, which can be considered as a plane parallel to the ground, that is, the bottom surface of the sole. It is easy to understand that the reference plane here only provides a reference for the extension of the base 11 and does not limit the base 11 to a flat plate structure. Generally speaking, the base 11 can be the shape of a conventional sole. For example, the bottom surface of the base 11 is roughly in the same plane at the arch and heel, but the forefoot can be slightly tilted upward and forward. However, generally speaking, the top surface of the base 11 should be a roughly flat structure. A second side wall 24 is formed on the periphery of the base 11 and extends upward. The second side wall 24 is arranged around the base 11, so that the midsole 10 forms a box-shaped structure with a bottom and walls on the sides.

[0046] The outsole 20 is compounded below the midsole 10, wherein the support bottom portion 23 is compounded on the bottom surface of the base 11, and the second side wall 24 is compounded on the outside of the first side wall 12. Generally speaking, the midsole 10 and the outsole 20 can be compounded into one body by bonding, but other methods such as welding can also be used, which are not limited here. The outsole 20 includes a first part 21 and a second part 22 separated from each other along the length direction. The separation position of the first part 21 and the second part 22 roughly corresponds to the connection position of the forefoot and the arch of the foot, which is the position where the sole bends when walking under normal circumstances. The first part 21 and the second part 22 both include a support bottom portion 23 and a second side wall 24. The support bottom portion 23 extends parallel to the base 11. The parallel extension here does not mean that the support bottom portion 23 and the base 11 are completely parallel, but that the support bottom portion 23 and the base 11 are tightly fitted with each other at all places, and the extension of the two at the same position is consistent. The second side wall 24 extends upward from the periphery of the support bottom portion 23 as a whole. However, since the outsole 20 includes the first portion 21 and the second portion 22, the outsole 20 is not provided with the second side wall 24 around the entire periphery of the support bottom portion 23. Instead, the second side wall 24 is provided only around the periphery of the support bottom portion 23 relative to the sole.

[0047] And, refer to Figure 1 and Figure 4 The upper edge of the first sidewall 12 at each position is located above the second sidewall 24 at the same position, indicating that the first sidewall 12 is always higher than the second sidewall 24. The first sidewall 12 includes a first front sidewall 121, a first side wall 122, and a first rear sidewall 123. The second sidewall 24 includes a second front sidewall 241, a second side wall 242, and a second rear sidewall 243.

[0048] Because the sole comprises a midsole 10 and an outsole 20, and the midsole 10 is made of a first material with a relatively high hardness and includes a base 11 and a first sidewall 12, the midsole 10, through the inherent rigidity of the material and the enclosure design of the first sidewall 12, forms a three-dimensional frame that surrounds and accommodates the foot. When the foot tends to tilt or twist laterally during movement, this rigid frame structure provides effective physical resistance, thereby limiting excessive displacement of the foot and providing stable support. Furthermore, because the foot is accommodated within the three-dimensional frame formed by the midsole 10, rather than being restricted by the upper, the base 11 of the midsole 10 can be designed to be thinner, thereby improving the foot's perception of the ground and better receiving ground feedback, which helps children learn to walk. Secondly, the outsole 20 is made of a material with a lower hardness and is divided into a first portion 21 and a second portion 22. Both the first portion 21 and the second portion 22 have a support base 23 and a second side wall 24. The support base 23 is compounded below the base 11 of the midsole 10 and can directly contact the ground. Its softer material provides a good ground contact feel and is more wear-resistant and non-slip. The second side wall 24 is compounded on the outside of the first side wall 12. Because the foot is contained in the three-dimensional frame formed by the harder midsole 10, collisions and scrapes between the side of the sole and the outside are more likely to affect the foot inside. The softer second side wall 24 can absorb energy and avoid significant impact on the foot inside the sole. At the same time, because the second side wall 24 is an integral structure with the support base 23, it can further support the first side wall 12, preventing the first side wall 12 from tilting and better wrapping the foot, thereby further improving the overall stability of the sole. The first sidewall 12 is always higher than the second sidewall 24, ensuring that the first portion 21 and the second portion 22 of the outsole 20 correspond to the forefoot and the portion behind the forefoot, respectively. When wearing this outsole, the sole flexes in these separate portions of the outsole 20, rather than throughout the entire sole, effectively improving the flexibility of the entire sole. The design of the first sidewall 12 of the midsole 10 being consistently higher than the second sidewall 24 of the outsole 20 at the same cross-sectional location ensures that the rigid frame's stabilizing function remains dominant, while the lower second sidewall 24 prevents structural interference with the flexing of the various portions of the outsole 20.

[0049] Preferably, the second portion 22 further includes at least two third portions 221 and fourth portions 222 separated from each other along the length direction of the sole, wherein the third portion 221 corresponds to the arch portion of the sole, and the fourth portion 222 corresponds to the heel portion of the sole; the second side walls 24 are provided on both sides of the third portion 221 and the rear and both sides of the fourth portion 222. Figure 2 and Figure 3The second part 22 is further divided into a third part 221 and a fourth part 222, which correspond to the arch and heel of the sole respectively, so that the bending area of ​​the sole is more clear, and can adapt to different foot movements during walking, such as forefoot plantar flexion, arch support and heel landing, so that the dynamic response of the sole is more coordinated with the foot movement.

[0050] And, refer to Figure 2 , the separation interface between the first part 21, the third part 221, and the fourth part 222, which are relative to each other in the front-to-back direction, extends along the width direction of the sole and is in the shape of a curved smooth arc. Specifically, the separation interface is not a straight line, but is designed as one or more curved smooth arcs. For example, the separation interface between the first part 21 and the third part 221 can be designed as a smooth arc with the center convex forward. Compared with the straight-line division, the arc-shaped division interface makes the transition of plantar pressure between different areas smoother, avoids the gait instability caused by sudden pressure changes during walking, and makes the entire gait transition process from heel contact to forefoot leave the ground smoother.

[0051] In addition, refer to Figure 2 In this embodiment, the support bottom portion 23 of the third portion 221 includes a base portion 25 and a protruding portion 26. The protruding portion 26 extends obliquely from the base portion 25 near the medial foot side of the sole toward the rear end and lateral foot side of the sole. The base portion 25 and the protruding portion 26 cooperate to define a longitudinal groove 27 extending obliquely from the medial foot side toward the rear end and lateral foot side of the sole in the width direction of the sole. Specifically, the base portion 25 of the third portion 221 spans the width direction of the sole. The protruding portion 26 extends obliquely toward the rear end and lateral foot side of the sole near the medial foot side of the sole, forming a protruding portion 26 that protrudes relative to the base portion 25. Furthermore, the base portion 25 near the lateral foot side also extends slightly rearward, thereby forming a longitudinal groove 27 between the protruding portion 26 and the base portion 25. The longitudinal groove 27 is closed at the front end and open at the rear end. By providing a base portion 25, a protruding portion 26, and a longitudinal groove 27 on the outsole 20 in the arch area, a specific plantar guidance structure is constructed. This structure utilizes the principles of human biomechanics, actively guiding the distribution of plantar pressure through a physical structure with a specific three-dimensional morphology. During walking, this combined structure, consisting of the support ridges of the protruding portion 26 and the guiding channels of the longitudinal grooves 27, provides an advantageous path for the plantar pressure center to be transmitted from back to front. This effective management of dynamic force flow helps users establish a stable gait trajectory from the outer side of the heel to the inner side of the forefoot, which actively promotes the development of correct walking posture in children.

[0052] In addition, refer to Figure 1 and Figure 3 The first sidewall 12 has at least two mutually connected first bends 13 formed on both sides of the first sidewall 12 from front to back. The upper edges of the first bends 13 are arc-shaped and convex upward relative to the base 11. At least one of the first bends 13 corresponds to the first portion 21 of the outsole 20, and at least another first bend 13 corresponds to the second portion 22 of the outsole 20. Furthermore, the first sidewall 12 has three mutually connected first bends 13 formed on both sides of the first sidewall 12 from front to back. The first portion 21, third portion 221, and fourth portion 222 of the outsole 20 each correspond to one of the first bends 13 from front to back, and the second sidewalls 24 of each of the first portion 21, third portion 221, and fourth portion 222 are each provided with a second bend 28 corresponding in shape to the upper edge of the first bend 13. Specifically, the upper edge of each first bend 13 forms a smooth, curved arc that bulges upward relative to the base 11. Adjacent first bends 13 form a smooth transition, forming a wavy sidewall profile. These three first bends 13 correspond, from front to back, to the positions of the first, third, and fourth portions 21, 221, and 222 of the outsole 20, respectively. Furthermore, each of the three second sidewalls 24, or second sidewalls 242, also features a second bend 28 that perfectly matches the shape of the corresponding first bend 13 at its upper edge, ensuring a highly coordinated and unified profile of the sidewalls of the midsole 10 and outsole 20. This curved sidewall structure better adapts to the changing shape of the foot's side surface during walking and bending, avoiding the localized pressure that can occur with straight sidewalls during bending, thereby enhancing wearing comfort. This top-to-bottom correspondence ensures consistent movement between the midsole 10 and outsole 20 during bending.

[0053] Reference Figure 1 and Figure 3 , the front portion of the first side wall 12 is folded upward and backward; the rear portion of the first side wall 12 is extended upward and backward at an angle. Specifically, the folding structure refers to the upper edge portion of the first front side wall 121 being bent toward the inside of the sole and extending to cover the front upper surface of the base 11 of the midsole 10, thereby forming a double-layer or reinforced protective structure at the toe position composed of the base 11, the vertical section of the first front side wall 121 and its folded section. At the same time, the rear portion of the first side wall 12, i.e., the first rear side wall 123, extends upward and backward at an angle. This structure forms a U-shaped heel cup with an inner wall having a curved surface and opening forward, and its inclination angle can be set between 5 and 15 degrees to better fit and lock the heel.

[0054] The front portion of the first side wall 12 of the midsole 10 is designed to fold upward and backward. This integrally formed fold creates a double-layered protective area at the toe box, enhancing the structural strength of this area and effectively resisting external impacts. Simultaneously, the rear portion of the first side wall 12 is designed to extend upward and backward at an angle. This tilt allows the inner wall of the heel cup to better conform to the rounded contour of the heel, increasing the contact area, thereby improving heel support and fixation, and reducing the phenomenon of the shoe not following the foot during walking.

[0055] In addition, refer to Figure 1 and Figure 3 The upper edges of the front and rear portions of the first and second side walls 12 and 24 are higher than the side portions. Specifically, for example, the highest points of the first front side wall 121 and the first rear side wall 123 can be 2 to 5 mm higher than the highest point of the first side wall 122. This differentiated height design allows the sole's support to be distributed as needed: stronger structural support is provided at the toe, where protection is crucial, and at the heel, where stability is crucial. Meanwhile, lower side walls are used on both sides, where freedom of movement is crucial, to avoid restricting foot bending.

[0056] Reference Figure 4The outer surface of the first sidewall 12 is provided with a ridge 14 that extends around and overlaps the upper edge of the second sidewall 24. Specifically, the ridge 14 can be a continuous or discontinuous raised strip with a rectangular or trapezoidal cross-section, located immediately above the upper edge of the second sidewall 24. During assembly, the upper edge of the second sidewall 24 is physically locked beneath the ridge 14, forming a tight mechanical interlocking structure. When the midsole 10 and the outsole 20 are combined into one, the ridges 14 can transform the connection mode between the midsole 10 and the outsole 20 from simple plane bonding to a composite connection with bonding and mechanical interlocking. Thus, when the second side wall 24 is subjected to an external force intended to separate it from the first side wall 12, the physical constraint of the ridges 14 converts the peeling stress into shear stress and compressive stress that the structure can more easily withstand, thereby enhancing the bonding strength between the midsole 10 and the outsole 20, effectively preventing the soft outer layer from curling, degumming and other problems during use, and improving the overall structural stability and durability of the sole. At the same time, when the user's foot is pressed against the When force is applied to the midsole 10, it transmits that force to the outsole 20. However, under normal circumstances, the midsole 10 only transmits this force from the base 11 to the support portion 23 of the outsole 20. However, the ridges 14 allow the force applied to the midsole 10 to be transferred to the second sidewall 24 of the outsole 20, thereby forming a more complete support path. The entire outsole 20 and midsole 10 can participate in the force applied to the sole. Furthermore, the slight inward bending of the second sidewall 24 when subjected to force further enhances the wrapping of the three-dimensional framework formed by the midsole 10 on the foot, thereby further improving the support and stability of the entire sole. Furthermore, the ridges 14 serve as a positional reference when the midsole 10 and outsole 20 are combined, defining the distance and degree of contact between the base 11 of the midsole 10 and the support portion 23 of the outsole 20 during the composite process.

[0057] Example 2

[0058] A second embodiment of the present invention provides a footwear product comprising an upper and the high-stability sole described in the first embodiment. The upper is secured to the upper edge and inner side of the first sidewall 12 of the midsole 10 of the shoe by stitching, gluing, or other conventional means. Due to the use of the aforementioned sole, this footwear product provides excellent support, stability, and flexibility when worn by the user.

[0059] The above description and embodiments are intended to explain the scope of protection of the present invention, but do not constitute a limitation thereto. Modifications, equivalent substitutions, or other improvements to the embodiments of the present invention or portions thereof that can be obtained by a person of ordinary skill in the art through logical analysis, reasoning, or limited experimentation based on the teachings of the present invention or the above embodiments, combined with common knowledge, ordinary technical knowledge in the field, and / or prior art, should all be included within the scope of protection of the present invention.

Claims

1. A high stability sole, characterized by: include: A midsole (10) is made of a first material and has a base (11) extending in a reference plane, and a first side wall (12) extending upward from the periphery of the base (11) and surrounding the front, rear and both sides of the base (11); an outsole (20) is made of a second material and fixedly compounded below the midsole (10); the outsole (20) includes at least two first parts (21) and second parts (22) separated from each other along the length direction of the sole, wherein the first part (21) corresponds to At the forefoot portion of the sole, the second portion (22) corresponds to the arch portion and the heel portion of the sole; the first portion (21) and the second portion (22) both include a supporting portion (23) extending parallel to the base portion (11), and second side walls (24) extending upward from the periphery of the supporting portion (23) at the front and both sides of the first portion (21) and at the rear and both sides of the second portion (22); the second side walls (24) are compounded with the outer sides of the first side walls (12) at corresponding positions; The hardness of the first material is higher than that of the second material; the upper edge of the first side wall (12) is located above the upper edge of the second side wall (24) at the same cross-sectional position in the length direction of the sole.

2. A high stability sole as claimed in claim 1, characterized in that: The second part (22) further comprises at least two third parts (221) and a fourth part (222) separated from each other along the length direction of the sole, the third part (221) corresponding to the arch of the sole, and the fourth part (222) corresponding to the heel of the sole; the second side walls (24) are provided on both sides of the third part (221) and the rear and both sides of the fourth part (222).

3. A high-stability sole as claimed in claim 2, characterized in that: The portions of the first side wall (12) located on both sides form at least two mutually connected first bending portions (13) from front to back, and the upper edges of the first bending portions (13) are in an arc shape that bulges upward relative to the base (11); at least one of the first bending portions (13) corresponds to the position of the first portion (21) of the outsole (20), and at least another of the first bending portions (13) corresponds to the position of the second portion (22) of the outsole (20).

4. A high-stability sole as claimed in claim 3, characterized in that: The parts located on both sides of the first side wall (12) form three mutually connected first bending parts (13) from front to back; the first part (21), the third part (221), and the fourth part (222) of the outsole (20) correspond to one of the first bending parts (13) from front to back, and the second side walls (24) of the first part (21), the third part (221), and the fourth part (222) are respectively provided with a second bending part (28) corresponding to the shape of the first bending part (13) at the upper edge.

5. A high-stability sole as claimed in claim 4, characterized in that: The portion of the first side wall (12) located at the front is folded upward and backward; the portion of the first side wall (12) located at the rear is extended upward and backward.

6. A high-stability sole as claimed in claim 5, characterized in that: The upper edges of the front and rear portions of the first side wall (12) and the second side wall (24) are higher than the portions located on both sides.

7. A high-stability sole as claimed in claim 1, characterized in that: The outer surface of the first side wall (12) is provided with a convex ridge (14) that extends around and overlaps the upper edge of the second side wall (24).

8. A high-stability sole as claimed in claim 2, characterized in that: The separation interfaces between the first part (21), the third part (221), and the fourth part (222) which are opposite to each other in the front-to-back direction extend along the width direction of the sole and are in the shape of a curved smooth arc.

9. A high-stability sole as claimed in claim 8, characterized in that: The supporting bottom portion (23) of the third portion (221) includes a base portion (25) and a protruding portion (26); the protruding portion (26) is formed by the base portion (25) being close to the inner foot side of the sole and extending obliquely toward the rear end and outer foot side of the sole; the base portion (25) and the protruding portion (26) cooperate to define a longitudinal groove (27) extending obliquely from the inner foot side of the sole toward the rear end and outer foot side of the sole in the width direction of the sole.

10. A footwear product comprising an upper, characterized in that: The shoe further comprises the high-stability sole according to any one of claims 1 to 9, wherein the upper is compounded to the sole.

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