Lightweight cushioning sole and shoe

Abstract

The sole is provided with a first through hole, a second through hole and a third through hole from front to back, the first through hole, the second through hole and the third through hole penetrate in the width direction, and the first through hole, the second through hole and the third through hole correspond to the arch, the joint of the arch and the heel and the heel area respectively. The first through hole and the second through hole each comprise a middle through section and expansion sections at the two ends, and the circumferential sizes of the expansion sections are gradually increased from inside to outside. The projection shapes of the three through holes are triangles with smooth transition corners, but the shapes of the three through holes are different. The upper edge of the first through hole extends straightly. The upper edge of the second through hole inclines upwards from front to back. The upper edge of the third through hole inclines downwards from front to back. The sole can meet the requirements of light weight and cushioning.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of shoe sole, in particular to a light shock-absorbing shoe sole and shoe. BACKGROUND

[0002] As a key component of footwear, especially sports shoes, the main function of shoe sole is to bear the weight of human body and relieve the ground reaction force generated during movement. The midsoles of mainstream sports shoes on the market are usually made of high-molecular foam material. In order to obtain good shock-absorbing effect, the thickness or density of the foam material usually needs to be increased, which increases the overall weight of the shoe sole and the movement burden of the wearer. On the contrary, if the amount of material is reduced in order to pursue lightness, it will lead to insufficient shock-absorbing stroke and hard road feeling. SUMMARY

[0003] The purpose of the present application is to overcome the above-mentioned defects or problems existing in the background art, and to provide a light shock-absorbing shoe sole and shoe which can meet the requirements of lightness and shock-absorbing.

[0004] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: Technical scheme one: a light shock-absorbing shoe sole, the shoe sole is provided with first, second and third through holes along the width direction from front to back, the first through hole corresponds to the arch area of the shoe sole, the second through hole corresponds to the connection position of the arch area and the heel area of the shoe sole, and the third through hole corresponds to the heel area of the shoe sole; the first through hole includes two first expansion sections at both ends and a first through section in the middle along the width direction; the shape of the first through section on the projection plane perpendicular to the width direction is a triangle with smooth transition at the vertex position, and one side is located on the upper side and extends straight along the front and back directions; one end of the first expansion section in the width direction is connected with one end of the first through section in the width direction, and the other end is formed on the side surface of the shoe sole, and the circumferential dimension of the first expansion section gradually increases from the one end connected with the first through section to the other end; the second through hole includes two second expansion sections at both ends and a second through section in the middle along the width direction; the shape of the second through section on the projection plane perpendicular to the width direction is a triangle with smooth transition at the vertex position, and one side is located on the upper side and extends obliquely from front to back and from bottom to top; one end of the second expansion section in the width direction is connected with one end of the second through section in the width direction, and the other end is formed on the side surface of the shoe sole, and the circumferential dimension of the second expansion section gradually increases from the one end connected with the second through section to the other end; the shape of the third through hole on the projection plane perpendicular to the width direction is a triangle with smooth transition at the vertex position, and one side is located on the upper side and extends obliquely from front to back and from top to bottom.

[0005] Technical Solution 2 based on Technical Solution 1: On the projection plane perpendicular to the width direction, the first through section in the first through hole is located at the front of the first expansion section along the length direction, and the portion of the first expansion section located behind the first through section in the length direction extends obliquely from front to back and from bottom to top.

[0006] Technical Solution 3 based on Technical Solution 2: The rear end of the first expansion section extends to the area where the second through hole is located and is located above the second through hole.

[0007] Technical Solution 4 based on Technical Solution 3: The first expansion segment includes an outward expansion segment connected to the first through segment and a straight segment connected to the outward expansion segment and the side surface of the sole along the width direction; the circumferential dimension of the outward expansion segment gradually increases from the end connected to the first through segment toward the other end, and the circumferential dimension of the straight segment remains consistent in the width direction.

[0008] Technical Solution 5 based on Technical Solution 1: On the projection plane perpendicular to the width direction, the first through segment in the first through hole has an inverted triangular shape with one vertex on the bottom and two vertices on the top.

[0009] Technical Solution Six Based on Technical Solution One: On the projection plane perpendicular to the width direction, the second through segment of the second through hole also has one side located on the lower side and extending straight along the front-back direction, and the other side located on the rear side and extending obliquely from front to back and from bottom to top.

[0010] Technical solution seven based on technical solution six: On the projection plane perpendicular to the width direction, the third through hole also has one side located on the lower side and extending straight along the front-back direction, and another side located on the front side and extending obliquely from front to back and from bottom to top.

[0011] Technical solution eight based on technical solution one: The bottom surface of the shoe sole is recessed at least at the boundary position corresponding to the first through hole, the second through hole and the third through hole, with a groove extending along the width direction to both sides of the shoe sole.

[0012] Technical Solution Nine based on Technical Solution One: The first through hole, the second through hole, and the third through hole are smoothly connected to the side surface of the shoe sole.

[0013] In addition, the present invention also provides technical solution ten: a shoe, which includes an upper and a sole as described in any one of technical solutions one to nine; the upper is attached to the sole.

[0014] 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: In current shoe sole manufacturing technology, to reduce the overall weight of the sole, transverse perforations are typically created on the side of the midsole. In conventional designs, engineers usually employ a straight-tube design with uniform perforation diameter. While this structure can reduce material usage, it suffers from insufficient load-bearing capacity. When the sole is subjected to the pressure of body weight or impact from exercise, high stress concentration occurs at the opening edges of the straight-tube perforations. To prevent tearing at the perforation edges, current conventional practices often necessitate increasing the overall wall thickness of the midsole or using materials with higher rigidity. This somewhat diminishes the advantages of lightweight construction or results in a stiffer sole feel.

[0015] The lightweight cushioning sole provided by technical solution one features expansion sections with gradually increasing circumferential dimensions at both ends of the first and second through holes, forming a variable cross-section structure. When the sole is subjected to vertical compression, the thinner through section located in the middle of the hole deforms first, playing a major cushioning role; while the gradually expanding expansion sections smoothly guide the stress area from the center of the hole to a larger surface on the side of the sole, thus better dispersing the stress at the opening edge and reducing the degree of stress concentration. Therefore, the sole provided by this solution can achieve good structural durability while maintaining thin hole walls and light weight, reducing the risk of tearing at the hole openings after long-term use. Furthermore, soles using conventional straight-tube holes are prone to twisting or lateral swaying when subjected to lateral forces due to the lack of lateral support structure. The expansion sections in this solution make the hole size larger near the outer surface of the sole, and this structure of wider outer and narrower inner shape physically forms a wider support base. When the sole is compressed, the wider structure on the outside can limit the lateral tilt of the midsole, so that while providing mechanical cushioning travel, the sole still maintains good lateral stability, reducing the chance of the wearer landing unsteadily.

[0016] Building upon this, this design specifically features triangular cross-sections for the through-holes, with each of the three through-holes possessing a distinct triangular shape. Existing circular or elliptical structures, when subjected to pressure, typically undergo isotropic flattening deformation. While providing some cushioning, these structures exhibit low rigidity and slow rebound response after pressure is removed. In contrast, the triangular structure employed in this design offers superior stability. Under vertical loads, the edges of these triangular through-holes elastically bend, storing elastic potential energy. Upon removal of pressure, they quickly return to their original shape, providing excellent energy feedback for the wearer. In this design, the third through-hole at the heel's end has its upper triangular edge angled downwards and backwards. This shape facilitates adaptive compressive deformation in this area upon ground contact, effectively absorbing the impact force of heel strike. The second through-hole in the middle has its upper edge angled upwards and backwards. This structural guidance helps convert vertical pressure into a forward propulsive force during forward weight shifts, aiding in a smooth gait transition. The first through hole located at the arch of the foot adopts a triangular design with a straight upper edge. Utilizing the high vertical load-bearing capacity of the triangular structure, it provides strong rigid support for the arch of the foot and prevents excessive collapse in this area when bearing weight.

[0017] Furthermore, while triangular structures offer higher rigidity and resilience compared to circular structures, their apex is often the area of ​​highest stress concentration under load. Without proper transition, tearing at the opening is highly likely. The expansion section in this design provides a gradual stress release space at the apex of the triangular structure. When the sides of the triangle undergo elastic bending, the expansion section guides the stress originally concentrated at the apex to a larger area on the side of the sole, thus preventing structural damage caused by excessive local stress. Simultaneously, the outer-wide, inner-narrow shape formed by the expansion section provides stable support for the triangular structure, thereby constraining the deformation path of the triangular through-hole and ensuring that the triangular structure deforms strictly according to the preset pattern when subjected to impact, without unexpected torsion or deformation.

[0018] In summary, the lightweight cushioning sole provided by this solution effectively disperses stress at the edges of the perforations by incorporating a variable cross-section structure with an expansion section. Its wider outer and narrower inner structure enhances lateral support, thus achieving significant weight reduction while ensuring structural durability and stability. Furthermore, by designing the perforations in triangular shapes and using different triangular structures for different perforations, better energy return is achieved. Moreover, the segmented structure of the perforations and the triangular shapes work together to ensure excellent cushioning and rebound performance while achieving a lightweight sole.

[0019] In technical solution two, the rear portion of the first expansion segment is designed to extend slopingly from front to back and from bottom to top. This structure forms a supporting slope at the junction of the arch and heel, conforming to the direction of the plantar fascia. When the foot transitions from heel to forefoot through the arch area, the sloping expansion segment wall can absorb the shear force from the rear and convert it into an upward supporting force, thereby smoothing the stiffness change between the front and rear sections of the midsole, resulting in a more natural and smooth gait transition.

[0020] In technical solution three, the rear end of the first expansion section is extended above the second through hole. The triangular structure of the through hole creates space, so that the first and second through holes are not completely separated in the length direction, but overlap in the vertical direction. This allows the impact force to be better transmitted between the arch area and the heel area, and enhances the anti-torsion performance of the sole in the arch area.

[0021] In technical solution four, the expansion section is subdivided into an outer expansion section and a straight section. The gradually expanding outer section is responsible for the main stress dispersion function, guiding and releasing the concentrated stress in the hole. The straight section located on the outermost side provides a uniformly thick reinforcing structure for the edge area of ​​the through hole, which enhances the structural strength of the edge area of ​​the through hole without affecting the guiding function of the expansion section.

[0022] In technical solution five, the first through section of the first through hole is designed as an inverted triangle with the apex at the bottom and the two apexes at the top. The two upper corners of the inverted triangle can broadly support the pressure under the arch of the foot, while the lower corner acts as a fulcrum to maintain the vertical rigidity of the structure. Compared to an equilateral triangle or a circle, this inverted triangle structure is less prone to compressive deformation under vertical loads, thus providing a more solid and less prone to collapse support platform for the arch of the foot.

[0023] In technical solution six, the second through section of the second through hole has a structure with a straight bottom and an upward sloping rear. The straight bottom ensures the stability of the area of ​​the sole when it touches the ground. The upward sloping rear side from front to back works in conjunction with the upward sloping direction of the top side to form a wedge-shaped structure that is thinner in the front and thicker in the back. This structure allows the heel area of ​​the sole to generate a forward pushing tendency when compressed, improving the smoothness of the wearer's movement.

[0024] In technical solution seven, the second through hole has a structure with a straight bottom edge and an upward sloping rear edge. Combined with the downward sloping design of the upper edge, the third through hole presents a shape with a larger rear opening, which allows the heel to deform better when it touches the ground, thereby absorbing the impact from the ground. The straight bottom edge ensures stability when touching the ground.

[0025] In technical solution eight, a bottom groove is provided at the boundary of the through holes. The presence of the groove weakens the connection rigidity between the holes at the bottom, forming a pre-set bending line. The sole can conform to the natural bending state of the foot when walking, allowing the areas where the first, second, and third through holes are located to deform and rebound relatively independently. This design reduces the resistance when the sole bends, improving the flexibility of wearing the shoe.

[0026] In technical solution nine, the through hole and the side surface of the sole are smoothly connected to avoid stress concentration at the connection point between the through hole and the side surface of the sole, and protect the edge of the through hole from cracking due to deformation.

[0027] Technical solution ten provides a shoe that uses the aforementioned sole, which can balance lightweight and cushioning performance. Attached Figure Description

[0028] 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.

[0029] Figure 1 This is a side view of a lightweight cushioning shoe sole according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the lightweight cushioning sole according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the bottom surface of the lightweight cushioning shoe sole according to an embodiment of the present invention.

[0030] Explanation of key figure labels: Outsole 100; Forefoot area 101; Arch area 102; Heel area 103; Top of outsole 111; Bottom of outsole 112; First through hole 200; First expansion section 210; Outward expansion section 211; Straight section 212; First through section 220; First side 221; Second side 222; Third side 223; Second through hole 300; Second expansion section 310; Second through section 320; Fourth side 321; Fifth side 322; Sixth side 323; Third through hole 400; Seventh side 411; Eighth side 412; Ninth side 413; Groove 500. Detailed Implementation

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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."

[0036] Example This invention relates to a shoe, comprising a sole 100 and an upper. The sole 100 is a lightweight, shock-absorbing sole according to this invention. The upper can be a flexible component made of fabric, leather, synthetic leather, mesh, knitted materials, or thermoplastic polyurethane, or a structure formed by a composite process of multiple materials. The upper is positioned above the sole 100 and is used to wrap and secure the wearer's foot. The connection between the upper and the sole 100 can be achieved through conventional processes such as adhesive bonding, stitching, heat fusion bonding, or one-piece injection molding. Specifically, this shoe can be a running shoe, basketball shoe, cross-training shoe, casual shoe, or outdoor hiking shoe.

[0037] Reference Figure 1 In this embodiment, the lightweight cushioning sole 100 is provided with a first through-hole 200, a second through-hole 300, and a third through-hole 400 extending along the width direction from front to back. The first through-hole 200 corresponds to the arch region 102 of the sole 100, the second through-hole 300 corresponds to the junction of the arch region 102 and the heel region 103 of the sole 100, and the third through-hole 400 corresponds to the heel region 103 of the sole 100. The sole 100 can be made of a polymer material with elastic deformation capabilities, such as ethylene-vinyl acetate copolymer (EVA), thermoplastic polyurethane (TPU), thermoplastic polyester elastomer (TPEE), or polyether block amide (PEBA). Preferably, the sole 100 is made of a microporous foam material prepared by supercritical foaming process and integrally manufactured by injection molding or compression molding. Alternatively, the sole 100 can also be directly formed using 3D printing technology.

[0038] The sole 100 corresponds to the foot structure and can be divided into three regions from front to back: the forefoot region 101, the arch region 102, and the heel region 103. It should be understood that this division is a relative region based on human anatomy and gait force characteristics; there are no absolute physical boundaries between the regions, but they are interconnected and allow for some overlap. The main purpose of this regional division is to differentiate the functional configuration of the sole 100 structure according to the physiological needs of different parts of the foot during movement. In actual manufacturing, the specific length ratio of each region can be adaptively adjusted according to shoe size, the specific function of the shoe, and the wearer's biomechanical data. Furthermore, the positions of the aforementioned regions refer to their approximate length when the sole 100 is in a naturally flat position. The length, width, and thickness directions of the sole 100 refer to its forward-backward extension (from the toe to the heel), lateral extension (from the inner side to the outer side), and vertical extension (from the bottom surface in contact with the ground to the top surface conforming to the foot), respectively. The top surface 111 and bottom surface 112 of the sole 100 are referenced... Figure 1 Normally, these three directions are mutually perpendicular, forming a coordinate system reference standard for describing the three-dimensional spatial structure of the shoe sole.

[0039] In this embodiment, the sole 100 is mainly provided with a first through hole 200, a second through hole 300, and a third through hole 400, as shown in the figure. Figure 1 The following section provides a detailed explanation of each of these through holes.

[0040] Reference Figure 1 and Figure 2The first through hole 200 includes two first expansion sections 210 at both ends and a first through section 220 in the middle along the width direction; the first through section 220 is shaped as a triangle with a smooth transition at the vertex on the projection plane perpendicular to the width direction, and one side of it is located on the upper side and extends straight along the front-back direction; one end of the first expansion section 210 in the width direction is connected to one end of the first through section 220 in the width direction, and the other end is formed on the side surface of the sole 100, and the circumferential dimension of the first expansion section 210 gradually increases from the end connected to the first through section 220 toward the other end.

[0041] Specifically, the first through-hole 200 forms a channel structure extending along the width direction inside the sole 100. The first through-hole 200 includes, sequentially along the width direction, a first expansion section 210, a first through section 220, and another first expansion section 210. The first expansion section 210 connects to the first through section 220 and extends to the side surface of the sole 100. The first through section 220 is located between the two first expansion sections 210. The circumferential inner diameter of the first through section 220 remains approximately constant along the width direction. The circumferential inner diameter of the first expansion section 210 gradually increases from the inside to the outside, where "from the inside to the outside" refers to the location of the first through section 220 as the inside and the side surface of the sole 100 corresponding to the location of the first expansion section 210 as the outside. The circumferential inner diameter of the first through section 220 is clearly the minimum circumferential dimension of the first through-hole 200.

[0042] In this embodiment, on the projection plane perpendicular to the width direction, the first through hole presents an inverted triangular shape with a smooth transition at the vertices. Here, "smooth transition at the vertices" means that all three vertices of this triangular shape have a smooth, arc-shaped transition structure. One vertex of the triangular structure corresponding to the first through hole is located on the lower side, and two vertices are located on the upper side. The line connecting the two upper vertices forms the upper edge of the first through segment 220, namely the first side 221. This first side 221 extends horizontally in a roughly straight manner along the front-back direction. "Straight extension" is only a general description; it can also have a slightly arc-shaped structure, such as a slight convexity or concavity. The lower vertex forms the support point of the first through segment 220. The two edges connected to this vertex are the second side 222 and the third side 223, respectively. The second side 222 is located further back, and the third side 223 is located further forward. In this embodiment, the third side 223 is shorter than the second side 222, and the inclination of the third side is steeper. Thus, the first through section 220 forms a wedge-shaped structure that is thicker at the front and thinner at the back.

[0043] In this embodiment, on the projection plane perpendicular to the width direction, the first expansion segment 210 is approximately an inverted triangle shape similar to the first through segment 220. The difference is that the first expansion segment 210 extends further rearward, the first through hole is located at the front of the first expansion segment 210 along the length direction, and the portion of the first expansion segment 210 located behind the first through segment 220 in the length direction extends obliquely from front to back and from bottom to top. The first expansion segment 210 can also be considered to have three sides, two of which extend rearward and obliquely upward, and the other side extends rearward and obliquely downward, connecting the other two sides together. This configuration makes the first expansion segment 210 appear as an oblique structure with a low front end and a high rear end on the projection plane. The first expansion segment 210 gradually grows outward from the position where it connects with the first through hole, and its rate of expansion gradually decreases from the inside to the outside, meaning that the deformation of the first expansion segment 210 is more gradual the closer it is to the side surface of the sole 100. The first expansion segment 210 includes, along its width, an outwardly expanding segment 211 that connects to the first through segment 220 and a straight segment 212 that connects the outwardly expanding segment 211 to the side surface of the sole 100. The circumferential dimension of the outwardly expanding segment 211 gradually increases from the end connecting to the first through segment 220 towards the other end, while the circumferential dimension of the straight segment 212 remains consistent along its width. Specifically, one section of the outwardly expanding segment 211 is directly connected to the inner first through segment 220, and its circumferential dimension gradually increases from the inside out, forming a major flared transition area. The straight segment 212 is located outside the outwardly expanding segment 211, connecting the outwardly expanding segment 211 to the side surface of the sole 100. Within the range of the straight segment 212, the circumferential dimension of the first through hole 200 remains consistent and does not continue to expand.

[0044] Reference Figure 1 and Figure 2 The second through hole 300 includes two second expansion sections 310 at both ends and a second through section 320 in the middle along the width direction; the shape of the second through section 320 on the projection plane perpendicular to the width direction is a triangle with a smooth transition at the vertex, and one side of it is located on the upper side and extends obliquely from front to back and from bottom to top; one end of the second expansion section 310 in the width direction is connected to one end of the second through section 320 in the width direction, and the other end is formed on the side surface of the sole 100, and the circumferential dimension of the second expansion section 310 gradually increases from the end connected to the second through section 320 toward the other end; the shape of the third through hole 400 on the projection plane perpendicular to the width direction is a triangle with a smooth transition at the vertex, and one side of it is located on the upper side and extends obliquely from front to back and from top to bottom.

[0045] Specifically, the second through-hole 300 forms a channel structure extending along the width direction inside the sole 100. The second through-hole 300 sequentially connects a second expansion section 310, a second through section 320, and another second expansion section 310 along the width direction. The second expansion section 310 connects to the second through section 320 and extends to the side surface of the sole 100. The second through section 320 is located between the two second expansion sections 310. The circumferential inner diameter of the second through section 320 remains approximately constant along the width direction. The circumferential inner diameter of the second expansion section 310 gradually increases from the inside to the outside. Here, "from the inside to the outside" refers to the location of the second through section 320 as the inside and the side surface of the sole 100 corresponding to the location of the second expansion section 310 as the outside. The circumferential inner diameter of the second through section 320 is clearly the minimum circumferential dimension of the second through-hole 300.

[0046] In this embodiment, on the projection plane perpendicular to the width direction, the second through hole presents a triangular shape with a smooth transition at the vertices. Similarly, the smooth transition at the vertices here refers to the fact that all three vertices of this triangular shape have a smooth, arc-shaped transition structure. This triangular structure has one vertex on the front side and two vertices on the rear side; the vertex on the front side is the intersection of the upper and lower edges; the two vertices on the rear side are the upper rear vertex and the lower rear vertex, respectively. That is, the upper edge of the triangular shape formed by the second through segment 320 extends obliquely from front to back and from bottom to top, forming the fourth side 321; its rear edge extends obliquely from front to back and from bottom to top, forming the fifth side 322; and its bottom edge extends approximately straight from front to back, forming the sixth side 323. Thus, the second through segment 320 forms a wedge-shaped structure that is thinner at the front and thicker at the back.

[0047] In this embodiment, on the projection plane perpendicular to the width direction, the second expansion segment 310 is approximately triangular in shape similar to the second through segment 320. The difference lies in the fact that the upper edge of the second expansion segment 310 has a larger inclination angle, making the second through segment 320 seem to be located at the bottom of the second expansion segment 310. The second expansion segment 310 gradually grows outward from the position where it connects with the second through hole, and its rate of expansion gradually decreases from the inside to the outside. That is, the deformation of the second expansion segment 310 is more gradual the closer it is to the side surface of the sole 100.

[0048] The location of the second through hole 300 and the shape of the first expansion section 210 of the first through hole 200 extending backward and upward at an angle ensure that the rear end of the first through hole 200 is located above the second through hole 300. The wedge shape of the second through hole 300, which is thinner at the front and thicker at the back, allows the rear end of the first through hole 200 to be formed above the front end of the second through hole 300.

[0049] Reference Figure 1and Figure 2 The third through-hole 400, projected onto a plane perpendicular to its width, is a triangle with a smoothly transitioning apex, and one side is located on the upper side, extending sloping downwards from front to back. The third through-hole 400 also has one side located on the lower side, extending straight along the front-to-back direction, and another side located on the front side, extending sloping upwards from front to back. Specifically, the circumferential inner diameter of the third through-hole 400 remains approximately consistent along its width, thus the overall shape of the third through-hole 400 on this projection plane is triangular, with its upper edge being the seventh side 411, its front edge being the eighth side 412, and its bottom edge being the ninth side 413. The seventh side 411, the eighth side 412, and the ninth side 413 connect to form a wedge-shaped structure that is thicker at the front and thinner at the back. Of course, in other cases, the third through-hole 400 may also have a third expansion section similar to the first expansion section 210 and the second expansion section 310, and have a structure similar to the first through-hole 200 and the second through-hole 300, which will not be elaborated upon here.

[0050] The aforementioned through-holes 300, 300, and 400 smoothly transition to the side surface of the sole 100. This smooth transition means that at the junction where the inner wall of each through-hole extends to the side surface of the sole 100, there are no sharp edges or abrupt steps; instead, they are connected tangentially through rounded surfaces or continuous curved surfaces. In other words, the surface contour line is continuous and smooth as it transitions from the inner wall of the through-hole to the side surface of the sole 100, resulting in rounded corners or a streamlined shape at the edge of the opening.

[0051] Furthermore, referring to Figures 1 to 3 The bottom surface of the sole 100 has recesses 500 extending in the width direction to both sides of the sole 100 at least at the boundary positions corresponding to the first through hole 200, the second through hole 300, and the third through hole 400. Specifically, the bottom surface 112 of the sole has at least two recesses 500, which are located between the first through hole 200 and the second through hole 300, and between the second through hole 300 and the third through hole 400, respectively. These recesses 500 are located below the solid column structure between adjacent through holes and present a transversely penetrating groove-like structure on the bottom surface of the sole 100. The depth of the recesses 500 extends vertically upward, so that the local thickness of the sole 100 at these boundary positions is significantly thinner than the surrounding area.

[0052] The lightweight cushioning sole 100 of this embodiment features expansion sections with gradually increasing circumferential dimensions at both ends of the first through-hole 200 and the second through-hole 300, forming a variable cross-section structure. When the sole 100 is subjected to vertical compression, the thinner through-hole in the middle deforms first, playing a major cushioning role; while the gradually expanding expansion sections smoothly guide the stress area from the center of the hole to a larger surface on the side of the sole 100, thereby better dispersing the stress at the opening edge and reducing the degree of stress concentration. Therefore, the sole 100 provided by this solution can achieve good structural durability while maintaining thin hole walls and light weight, reducing the risk of tearing at the hole opening after long-term use. Furthermore, soles 100 with conventional straight-tube holes are prone to twisting or swaying when subjected to lateral forces due to the lack of lateral support structure. The expansion sections in this solution make the hole size larger near the outer surface of the sole 100, and this structure of wider outer and narrower inner forms a wider support base physically. When the sole 100 is compressed, the wider structure on the outside can limit the lateral tilt of the midsole, so that the sole 100 can provide mechanical cushioning travel while still maintaining good lateral stability, reducing the chance of the wearer landing unsteadily.

[0053] Building upon this, this design specifically features triangular cross-sections for the through-holes, with each of the three through-holes possessing a distinct triangular shape. Existing circular or elliptical structures, when subjected to pressure, typically undergo isotropic flattening deformation. While providing some cushioning, these structures exhibit low rigidity and slow rebound response after pressure is removed. In contrast, the triangular structure employed in this design offers superior stability. Under vertical loads, the edges of these triangular through-holes elastically bend, storing elastic potential energy. Upon removal of pressure, they quickly return to their original shape, providing excellent energy feedback for the wearer. In this design, the third through-hole 400, located at the heel's end, has its upper triangular edge angled downwards and backwards. This shape facilitates adaptive compressive deformation in this area upon ground contact, effectively absorbing the impact force of heel strike. The second through-hole 300, located in the middle, has its upper edge angled upwards and backwards. This structural guidance helps convert vertical pressure into a forward propulsive force during forward weight shifts, aiding in a smooth gait transition. The first through hole 200, located at the arch of the foot, adopts a triangular design with a straight upper edge. Utilizing the high vertical load-bearing capacity of the triangular structure, it provides strong rigid support for the arch of the foot and prevents excessive collapse in this area when bearing weight.

[0054] Furthermore, while triangular structures offer higher rigidity and resilience compared to circular structures, their apex is often the area of ​​highest stress concentration under load. Without proper transition, tearing at the opening is highly likely. The expansion section in this design provides a gradual stress release space at the apex of the triangular structure. When the sides of the triangle undergo elastic bending, the expansion section guides the stress originally concentrated at the apex to a larger area on the side of the sole, thus preventing structural damage caused by excessive local stress. Simultaneously, the outer-wide, inner-narrow shape formed by the expansion section provides stable support for the triangular structure, thereby constraining the deformation path of the triangular through-hole and ensuring that the triangular structure deforms strictly according to the preset pattern when subjected to impact, without unexpected torsion or deformation.

[0055] In summary, the lightweight cushioning sole 100 provided by this solution effectively disperses stress at the edge of the openings by incorporating a variable cross-section structure with an expansion section, and enhances lateral support through its outer-wide and inner-narrow structure. This achieves significant weight reduction while ensuring structural durability and stability. Furthermore, by designing the through-holes in triangular shapes and using different triangular structures for different through-holes, better energy return is achieved. Moreover, the segmented structure of the through-holes and the triangular shapes work together to ensure that the sole 100 maintains good cushioning and rebound performance while achieving lightweight design.

[0056] As one aspect of this embodiment, the rear portion of the first expansion segment 210 is designed to extend obliquely from front to back and from bottom to top. This structure forms a supporting slope that conforms to the direction of the plantar fascia at the junction of the arch and the heel. When the foot transitions from heel to forefoot through the arch region 102, the oblique expansion segment wall can withstand the shear force from the rear and convert it into an upward supporting force, thereby smoothing the stiffness change between the front and rear sections of the midsole, making the gait transition more natural and smooth.

[0057] As one aspect of this embodiment, the rear end of the first expansion section 210 is extended above the second through hole 300. By utilizing the clearance space created by the triangular structure of the through hole, the first through hole 200 and the second through hole 300 are not completely separated in the length direction, but overlap in the vertical direction. This allows the impact force to be better transmitted between the arch region 102 and the heel region 103, and can enhance the anti-torsion performance of the sole 100 in the arch region 102.

[0058] As one aspect of this embodiment, the expansion section is subdivided into an outer expansion section 211 and a straight section 212. The gradually expanding outer section 211 is responsible for the main stress dispersion function, guiding and releasing the concentrated stress in the hole. The outermost straight section 212 provides a uniformly thick reinforcing structure for the edge region of the through hole, enhancing the structural strength of the edge region of the through hole without affecting the guiding function of the expansion section.

[0059] As one aspect of this embodiment, the first through section 220 of the first through hole 200 is designed as an inverted triangle with the apex located on the lower side and the two apexes on the upper side. The two upper corners of the inverted triangle can broadly support the pressure under the arch of the foot, while the lower corner acts as a fulcrum to maintain the vertical rigidity of the structure. Compared to an equilateral triangle or a circle, this inverted triangle structure is less prone to compressive deformation under vertical loads, thus providing a more solid and less prone to collapse support platform for the arch of the foot.

[0060] As one aspect of this embodiment, the second through section 320 of the second through hole 300 has a structure with a flat bottom and an upward sloping rear. The flat bottom ensures the stability of the area of ​​the sole 100 when it touches the ground. The upward sloping rear side from front to back cooperates with the upward sloping direction of the top side to form a wedge-shaped structure that is thin in the front and thick in the back. This structure allows the heel area 103 of the sole 100 to generate a forward pushing tendency when compressed, improving the smoothness of the wearer's movement.

[0061] As one aspect of this embodiment, the second through hole 300 has a structure with a flat bottom edge and an upward sloping rear edge. Combined with the downward sloping design of the upper edge, the third through hole 400 presents a shape with a larger rear opening, which allows the heel to deform better when it touches the ground, thereby absorbing the impact from the ground. The flat bottom edge ensures stability when touching the ground.

[0062] As one aspect of this embodiment, a bottom groove 500 is provided at the boundary position of the through holes. The presence of the groove 500 weakens the connection rigidity between the holes at the bottom, forming a preset bending line. The sole 100 can conform to the natural bending state of the foot when walking, allowing the areas where the first, second, and third through holes 400 are located to deform and rebound relatively independently. This design reduces the resistance when the sole 100 bends and improves the flexibility of wearing.

[0063] As one aspect of this embodiment, the through hole and the side surface of the sole 100 are smoothly connected to avoid stress concentration at the connection between the through hole and the side surface of the sole 100, and protect the edge of the through hole from cracking due to deformation.

[0064] 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 lightweight, shock-absorbing shoe sole, characterized in that, The sole (100) is provided with a first through hole (200), a second through hole (300) and a third through hole (400) in the width direction from front to back. The first through hole (200) corresponds to the arch area (102) of the sole (100), the second through hole (300) corresponds to the connection position between the arch area (102) and the heel area (103) of the sole (100), and the third through hole (400) corresponds to the heel area (103) of the sole (100). The first through hole (200) includes two first expansion sections (210) at both ends and a first through section (220) in the middle along the width direction; the first through section (220) is shaped as a triangle with a smooth transition at the vertex on the projection plane perpendicular to the width direction, and one side is located on the upper side and extends straight along the front-back direction; one end of the first expansion section (210) in the width direction is connected to one end of the first through section (220) in the width direction, and the other end is formed on the side surface of the sole (100), and the circumferential dimension of the first expansion section (210) gradually increases from the end connected to the first through section (220) toward the other end; The second through hole (300) includes two second expansion sections (310) at both ends and a second through section (320) in the middle along the width direction; the second through section (320) is shaped as a triangle with a smooth transition at the apex on the projection plane perpendicular to the width direction, and one side of it is located on the upper side and extends obliquely from front to back and from bottom to top; one end of the second expansion section (310) is connected to one end of the second through section (320) in the width direction, and the other end is formed on the side surface of the sole (100), and the circumferential dimension of the second expansion section (310) gradually increases from the end connected to the second through section (320) toward the other end; The third through hole (400) is shaped as a triangle with a smooth transition at the apex on the projection plane perpendicular to the width direction, and one of its sides is located on the upper side and extends slopingly from front to back and from top to bottom.

2. The lightweight cushioning sole as described in claim 1, characterized in that, On the projection plane perpendicular to the width direction, the first through section (220) in the first through hole (200) is located at the front of the first expansion section (210) along the length direction, and the portion of the first expansion section (210) located behind the first through section (220) in the length direction extends obliquely from front to back and from bottom to top.

3. The lightweight cushioning sole as described in claim 2, characterized in that, The rear end of the first expansion section (210) extends into the area where the second through hole (300) is located and is above the second through hole (300).

4. The lightweight cushioning sole as described in claim 3, characterized in that, The first expansion segment (210) includes an outward expansion segment (211) connected to the first through segment (220) and a straight segment (212) connected to the outward expansion segment (211) and the side surface of the sole (100) along the width direction; the circumferential dimension of the outward expansion segment (211) gradually increases from one end connected to the first through segment (220) toward the other end, and the circumferential dimension of the straight segment (212) remains consistent in the width direction.

5. A lightweight cushioning sole as described in claim 1, characterized in that, On the projection plane perpendicular to the width direction, the first through segment (220) in the first through hole (200) has an inverted triangular shape with one vertex on the bottom and two vertices on the top.

6. The lightweight cushioning sole as described in claim 1, characterized in that, On the projection plane perpendicular to the width direction, the second through section (320) of the second through hole (300) also has one side located on the lower side and extending straight in the front-back direction, and the other side located on the rear side and extending obliquely from front to back and from bottom to top.

7. A lightweight cushioning sole as described in claim 6, characterized in that, On the projection plane perpendicular to the width direction, the third through hole (400) also has one side located on the lower side and extending straight in the front-back direction, and the other side located on the front side and extending obliquely from front to back and from bottom to top.

8. The lightweight cushioning sole as described in claim 1, characterized in that, The bottom surface of the sole (100) is recessed at least at the boundary position corresponding to the first through hole (200), the second through hole (300) and the third through hole (400) with a groove (500) extending in the width direction to both sides of the sole (100).

9. The lightweight cushioning sole as described in claim 1, characterized in that, The first through hole (200), the second through hole (300), and the third through hole (400) are smoothly connected to the side surface of the sole (100).

10. A shoe comprising an upper, characterized in that, It also includes a sole (100) as described in any one of claims 1-9; the upper is attached to the sole (100).

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