A 3D printing-based supporting jogging shoe midsole and jogging shoe

Abstract

The utility model discloses a slow running shoes insole and running shoes based on 3D printing in the technical field of sports shoes insole, including foam base body, the foam base body is fused and is connected composite structure, the composite structure includes the forefoot area of supporting metatarsophalangeal joint area, the arch support area of supporting arch area and the heel pressure area of supporting heel area, the utility model discloses a foam base body and composite structure form composite running shoes insole, and then provide high cushioning and soft foot feeling, and the forefoot area retains the area below metatarsophalangeal joint, to intervene cushioning and guide correct power mode, provide support and energy feedback in the stage of climbing and stretching, and the arch support area provides support to the arch of flat foot, to provide arch support and resist the shear force of internal rotation, and the heel pressure area of rear end is to ensure that the heel can effectively disperse pressure when landing in the process of running, reduce impact, effectively avoid the heel pain problem of flat foot caused by long time running.

Description

Technical Field

[0001] This utility model relates to the field of sports shoe midsole technology, specifically a 3D-printed support jogging shoe midsole and running shoe. Background Technology

[0002] Ultra-low density foam is a high-performance foaming material. Peba is a thermoplastic elastomer formed by block copolymerization of rigid polyamide hard segments and flexible polyether soft segments; both have low density. Both Peba and ultra-low density foam are used in 3D printing applications requiring lightweight and highly elastic materials, providing excellent cushioning and resilience.

[0003] However, in current running shoe midsole technology, the low modulus of ultra-low density foam cannot provide arch support for flat feet, leading to increased excessive pronation of the foot, and the homogeneous structure is prone to causing pressure concentration in the arch area; while the Peba substrate structure can locally enhance the modulus, its uneven weight distribution caused by its independent use results in poor foot feel, difficulty in accurately controlling the distribution of foot pressure, and inability to dynamically adapt to gait pressure changes for people with flat feet, resulting in poor performance. Utility Model Content

[0004] The purpose of this invention is to provide a 3D-printed support midsole and running shoe to solve the problems mentioned above. The ultra-low density foam has low modulus characteristics but cannot provide arch support for flat feet, which leads to excessive pronation of the foot and the homogeneous structure is prone to causing pressure concentration in the arch area. Although the Peba substrate structure can locally enhance the modulus, its uneven weight distribution caused by its independent use results in poor foot feel and difficulty in accurately controlling the distribution of foot pressure. Furthermore, it cannot dynamically adapt to changes in gait pressure for people with flat feet.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] In the first aspect, this utility model provides a 3D-printed support midsole for running shoes, including a foam matrix, on which a composite structure is fused together;

[0007] The composite structure includes a forefoot area supporting the metatarsophalangeal joint region, an arch support area supporting the arch region, and a heel pressure-bearing area supporting the heel region. The forefoot area, arch support area, and heel pressure-bearing area are connected in sequence and are all polygonal lattice structures.

[0008] The forefoot area and the heel pressure area both include a first lattice region on the side near the arch support area, and the other side of the forefoot area and the heel pressure area both include a second lattice region. The first lattice region is adjacent to and connected to the second lattice region. The polygonal lattice structure density of the first lattice region is greater than that of the second lattice region.

[0009] As a further embodiment of this utility model: the front end of the foam substrate and the front end of the forefoot area form a forefoot cutting area, and the rear end of the foam substrate and the rear end of the heel bearing area form a heel area.

[0010] As a further embodiment of this utility model: the front end of the forefoot area has a first end face and a second end face, the distance between the first end face and the front end face of the foam substrate is less than the distance between the second end face and the front end face of the foam substrate, the first end face and the second end face are arranged in parallel, and an inclined slope is connected between the first end face and the second end face, and the first end face, the second end face and the slope form a forefoot cutting area with the front end of the foam substrate.

[0011] As a further embodiment of this utility model: the arch support area is connected to a support column, the support column is embedded through the foam substrate, and the end face of the support column is adapted to the end face of the foam substrate.

[0012] As a further embodiment of this utility model: the height of the support column is 15mm to 25mm, and the support column has a polygonal lattice structure.

[0013] As a further embodiment of this utility model: the arch support area partially covers the central area of ​​the foam matrix, accounting for 40% to 60% of the total area.

[0014] Secondly, this utility model provides a running shoe, which includes a 3D-printed support jogging shoe midsole as described in the above solution.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. In this utility model, by connecting a composite structure to the bottom of the foam substrate, the composite structure is based on a polygonal lattice structure formed by 3D printing, allowing the foam substrate and the composite structure to form a composite running shoe midsole, thereby providing high cushioning and a soft feel. At the same time, the area below the metatarsophalangeal joint is retained in the forefoot area to intervene in shock absorption and guide the correct force generation mode, providing support and energy feedback during the push-off phase. The arch support area provides support for the arch of flat feet, providing arch support and counteracting the shear force caused by pronation, making it suitable for people with flat feet. The heel pressure area at the rear end ensures that the pressure can be effectively distributed when the heel lands during running, reducing impact and improving the wearer's comfort, effectively avoiding heel pain caused by long-term running for flat feet.

[0017] 2. In this invention, both the forefoot area and the heel pressure-bearing area are provided with a first lattice area and a second lattice area. The polygonal lattice structure density of the first lattice area is greater than that of the second lattice area. The high-density lattice of the first lattice area in the forefoot and heel pressure-bearing areas significantly improves the local compression modulus of the area, effectively resisting the tendency of excessive pronation of the foot caused by flat feet when landing, and directing the pressure more evenly to the midfoot part and the outer part of the forefoot of the foam matrix. The low-density lattice of the second lattice area reduces the compression modulus and flexural modulus of the area, making the gait transition smoother and more natural, guiding the foot to leave the ground in a more optimized posture, resulting in good performance. Attached Figure Description

[0018] Figure 1 This is a bottom view of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the inner side structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the outer side view of the present invention;

[0021] Figure 4 This is a top view of the structure of this utility model;

[0022] Figure 5 This is a three-dimensional structural diagram of the present invention.

[0023] In the diagram: 1. Forefoot area; 11. First lattice area; 12. Second lattice area; 2. Heel area; 3. Arch support area; 31. Support column; 4. Forefoot cutting area; 5. Heel bearing area; 6. Foam matrix. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example:

[0026] Please see Figures 1-5 In this embodiment of the invention, a 3D-printed support midsole for running shoes includes a foam substrate 6, on which a composite structure is fused together.

[0027] The composite structure includes a forefoot region 1 that supports the metatarsophalangeal joint area, an arch support region 3 that supports the arch area, and a heel pressure region 5 that supports the heel area. The forefoot region 1, the arch support region 3, and the heel pressure region 5 are connected in sequence and are all polygonal lattice structures.

[0028] The forefoot area 1 and the heel pressure area 5 both include a first lattice area 11 on the side near the arch support area 3, and the other side of the forefoot area 1 and the heel pressure area 5 both include a second lattice area 12. The first lattice area 11 is adjacent to the second lattice area 12, and the polygonal lattice structure density of the first lattice area 11 is greater than the polygonal lattice structure density of the second lattice area 12.

[0029] Among them, foam matrix 6 is an ultra-low density foam matrix. When the ultra-low density foam matrix is ​​made of 65MPa ultra-high pressure pure nitrogen supercritical foaming non-crosslinked pure Peba foam, its density is as low as 0.057g / cm³. 3 Its Peba substrate properties ensure higher intermaterial bonding strength with 3D printed Peba substrate structures; ultra-low density foam matrix is ​​used to provide long stroke, high cushioning, soft foot feel and overall lightweight;

[0030] The composite structure utilizes a 3D-printed Peba substrate structure. This 3D-printed Peba substrate structure provides high compressive modulus support, high flexural modulus guidance, high resilience limit, and customizable support shape. Peba is a thermoplastic elastomer formed by block copolymerization of rigid polyamide hard segments and flexible polyether soft segments. The polygonal lattice structure is based on the Thiessen polygonal lattice structure, a special geometric arrangement based on the Thiessen polygon principle. A Thiessen polygon, also known as a Voronoi diagram, is a continuous polygon composed of a set of perpendicular bisectors connecting two adjacent points. Each polygon has a generator point, and the distance between this point and any point within its corresponding polygon is less than the distance between this point and the generator points within its adjacent polygon. In the design of the 3D-printed support running shoe midsole, the Thiessen polygonal lattice structure not only ensures sufficient support but also, through its unique geometric arrangement, evenly distributes force, effectively mitigating the impact on the feet during running.

[0031] Specifically, by connecting a composite structure to the bottom of the foam matrix 6, the composite structure is based on a polygonal lattice structure formed by 3D printing. The polygonal lattice structure has high compressive modulus support, high flexural modulus guidance and high rebound limit, allowing the foam matrix 6 and the composite structure to form a composite running shoe midsole, thereby providing high cushioning and a soft feel. The composite structure of the foam matrix 6 mainly covers the forefoot and midfoot, and the heel covers the main pressure area, eliminating non-ground and upturned parts, saving materials and reducing weight, making the overall running shoe midsole lightweight. At the same time, the forefoot area 1 retains the area below the metatarsophalangeal joint to intervene in cushioning and guide the correct force pattern, providing support and energy return during the push-off phase. The arch support area 3 provides support for the arch of flat feet, providing arch support and counteracting the shear force brought by pronation, suitable for people with flat feet. The rear heel pressure area 5 ensures that the pressure can be effectively distributed when the heel lands during running, reducing impact and improving the wearer's comfort, effectively avoiding heel pain caused by long-term running for flat feet.

[0032] Furthermore, both the forefoot area 1 and the heel pressure-bearing area 5 are provided with a first lattice area 11 and a second lattice area 12. The polygonal lattice structure density of the first lattice area 11 is greater than that of the second lattice area 12. The high-density lattice of the first lattice area 11 (i.e., small lattice units, thick walls, or denser structure) in the forefoot area 1 and the heel pressure-bearing area 5 significantly improves the local compression modulus of this area, effectively resisting the tendency of excessive inward (outward) pronation of the foot caused by flat feet when landing, and directing the pressure more evenly to the midfoot part and the outer part of the forefoot of the foam matrix 6. The low-density lattice of the second lattice area 12 (i.e., large lattice units, thin walls, or looser structure) reduces the compression modulus and flexural modulus of this area, making the gait transition (roll) smoother and more natural, guiding the foot to leave the ground in a more optimized posture, resulting in better performance.

[0033] Preferred, such as Figure 1 As shown, the front end of the foam substrate 6 and the front end of the forefoot area 1 form the forefoot cutting area 4, and the rear end of the foam substrate 6 and the rear end of the heel bearing area 5 form the heel area 2.

[0034] Specifically, a forefoot cutting zone 4 is formed at the front end of the foam matrix 6, which makes the area where the thumb is located (the first metatarsal area) have a relatively higher compressive modulus and flexural modulus, further resisting pronation; and during the push-off and rebound process, this design can provide more outward force to help correct poor gait caused by excessive pronation of the foot. The rear end of the foam matrix 6 and the rear end of the heel bearing zone 5 form the heel zone 2. The heel zone 2 retains most of the foam matrix 6 to utilize the shock-absorbing properties of the foam matrix 6 structure, and removes the raised and non-grounded part of the heel to reduce the material used in the composite structure and further reduce the overall weight.

[0035] Preferred, such as Figure 1 As shown, the front end of the forefoot area 1 has a first end face and a second end face. The distance between the first end face and the front end face of the foam substrate 6 is less than the distance between the second end face and the front end face of the foam substrate 6. The first end face and the second end face are arranged in parallel. An inclined slope connects the first end face and the second end face. The first end face, the second end face and the slope form the forefoot cutting area 4 with the front end of the foam substrate 6.

[0036] Specifically, the front end of the forefoot area 1 has a wedge-shaped structure in the lateral direction, which effectively guides the natural alignment of the toes and enhances propulsion efficiency. The first end face is close to the position of the big toe. By reducing the distance from the front face of the foam matrix 6, the rigidity and support of this area are increased, which helps to control excessive pronation of the foot during running. The second end face is relatively far away from the front face of the foam matrix 6, maintaining sufficient flexibility and comfort to adapt to different pace requirements. The inclined slope design not only conforms to ergonomic principles and reduces friction and resistance during exercise, but also improves the fit and stability of the garment. The fine construction of the forefoot cutting area 4 enhances running performance.

[0037] Furthermore, the forefoot cutting zone 4 has a relatively higher compressive and flexural modulus in the area including the big toe (first metatarsal bone), which can provide differentiated support for different areas of the foot under stress during running. The big toe area bears greater pressure and flexion during running, so by increasing the compressive and flexural modulus of this area, the support can be effectively enhanced, energy loss reduced, and running efficiency improved.

[0038] Preferred, such as Figure 4 As shown, the arch support area 3 is connected to the support column 31, which is embedded through the foam substrate 6. The end face of the support column 31 is adapted to the end face of the foam substrate 6.

[0039] Preferred, such as Figure 5 As shown, the height of the support column 31 is 15mm to 25mm, and the support column 31 has a polygonal lattice structure.

[0040] Specifically, the height of the support column 31 is 15mm to 25mm, which ensures sufficient support strength while avoiding discomfort caused by excessive height. This allows the support column 31 to effectively transfer and disperse the impact force from the ground during running, protecting the arch of the foot from injury. At the same time, the polygonal lattice structure of the support column 31 not only reduces the overall weight but also improves the stability and durability of the structure, ensuring the long-term comfort and performance of the running shoe midsole. By directly penetrating the foam matrix 6, the support column 31 makes direct contact with the arch of the flat foot, using its high compression modulus to provide strong arch support, effectively preventing arch collapse during running, reducing foot fatigue and the risk of injury. It can also be customized according to the user's arch shape, molded based on the user's 3D arch scan data, with the surface curvature radius adapted to the physiological curvature of the arch, accurately matching the support needs of different flat-footed users.

[0041] Preferred, such as Figure 1 As shown, the arch support area 3 partially covers the central area of ​​the foam matrix 6, accounting for 40% to 60% of the total area.

[0042] Specifically, the midsection of the foam matrix 6 emphasizes and reinforces the medial arch area while removing 3D-printed material from the lateral arch area to avoid pressure on the fifth metatarsal tuberosity. The arch support zone 3, comprising 40% to 60% of the foot, effectively supports the arch, preventing excessive collapse during running, while ensuring sufficient cushioning and comfort in other areas of the foot. This balance of support and comfort provides runners with a superior running experience. Furthermore, this proportion range makes the overall structure of the foam matrix 6 more balanced, extending the lifespan of the running shoe.

[0043] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A 3D-printed support midsole for running shoes, comprising a foam matrix (6), characterized in that: The composite structure is fused together on the foam matrix (6). The composite structure includes a forefoot area (1) supporting the metatarsophalangeal joint region, an arch support area (3) supporting the arch region, and a heel pressure area (5) supporting the heel region. The forefoot area (1), the arch support area (3), and the heel pressure area (5) are connected in sequence and are all polygonal lattice structures. The forefoot area (1) and the heel pressure area (5) both include a first lattice area (11) on the side near the arch support area (3), and the other side of the forefoot area (1) and the heel pressure area (5) both include a second lattice area (12). The first lattice area (11) is adjacent to the second lattice area (12), and the polygonal lattice structure density of the first lattice area (11) is greater than the polygonal lattice structure density of the second lattice area (12).

2. The 3D-printed support running shoe midsole according to claim 1, characterized in that: The front end of the foam substrate (6) and the front end of the forefoot area (1) form the forefoot cutting area (4), and the rear end of the foam substrate (6) and the rear end of the heel bearing area (5) form the heel area (2).

3. The 3D-printed support running shoe midsole according to claim 2, characterized in that: The front end of the forefoot area (1) has a first end face and a second end face. The distance between the first end face and the front end face of the foam substrate (6) is less than the distance between the second end face and the front end face of the foam substrate (6). The first end face and the second end face are arranged in parallel. An inclined slope is connected between the first end face and the second end face. The first end face, the second end face and the slope form a forefoot cutting area (4) with the front end of the foam substrate (6).

4. The 3D-printed support running shoe midsole according to claim 1, characterized in that: The arch support area (3) is connected to a support column (31), which is embedded through the foam substrate (6). The end face of the support column (31) is adapted to the end face of the foam substrate (6).

5. The 3D-printed support running shoe midsole according to claim 4, characterized in that: The height of the support column (31) is 15mm to 25mm, and the support column (31) has a polygonal lattice structure.

6. The 3D-printed support running shoe midsole according to claim 5, characterized in that: The arch support area (3) partially covers the central area of ​​the foam matrix (6), accounting for 40% to 60% of the total area.

7. A running shoe, characterized in that: The running shoe includes a 3D-printed support running shoe midsole as described in any one of claims 1-6.

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