A footwear product suitable for diabetic foot

Abstract

This invention provides a footwear product suitable for diabetic foot. The midsole is composed of multiple unit cell lattice structures arrayed simultaneously in the vertical, horizontal, and longitudinal directions. The vertical direction is consistent with the thickness direction of the midsole, while the horizontal and longitudinal directions are orthogonal to each other and parallel to the plane of the midsole. Each unit cell lattice structure consists of a cube structure, two rectangular structures, four rhombus structures, and five support rods. The two rectangular structures, four rhombus structures, and five support rods are all arranged within the cube structure. The long sides of the two rectangular structures form the diagonal sides of the vertical end face of the cube. A support rod coincides with the intersection line of the two rectangular structures to divide the two rectangular structures into four orthogonally intersecting rectangular faces. The midpoints of the four sides of each rectangular face form the four endpoints of the rhombus structure. The line connecting the two vertical endpoints of each rhombus structure coincides with a support rod, which allows the vertical stiffness of a local area of ​​the midsole to be adjusted by changing the diameter of the support rod.

Description

Technical Field

[0001] This invention relates to the field of footwear technology, and more particularly to a footwear product suitable for diabetic foot. Background Technology

[0002] my country has become the country with the largest number of diabetes patients in the world, exceeding 140 million, and the trend is towards affecting younger people. To address the issue of excessive pressure on the feet of diabetic patients, which can easily lead to ulcers, existing technologies provide protection by increasing the softness of the shoe sole. However, due to the complex problems that diabetic patients are prone to in their feet, such as swelling, hallux valgus, double toe, collapsed arches, metatarsal collapse, and hindfoot weight shift, simply increasing the softness of the sole cannot meet individualized needs. Summary of the Invention

[0003] This invention provides a footwear product suitable for diabetic foot.

[0004] Specifically, the present invention is achieved through the following technical solution: This invention provides a footwear product suitable for diabetic foot, comprising an upper, a midsole, and an outsole. The midsole is composed of multiple unit cell lattice structures arrayed simultaneously in the vertical, horizontal, and longitudinal directions. The vertical direction is consistent with the thickness direction of the midsole, while the horizontal and longitudinal directions are orthogonal to each other and parallel to the plane of the midsole. Each unit cell lattice structure consists of a cube structure, two rectangular structures, four rhombus structures, and five support rods. The two rectangular structures, four rhombus structures, and five support rods are all arranged within the cube structure. The long sides of the two rectangular structures form the diagonal sides of the vertical end face of the cube. A support rod coincides with the intersection line of the two rectangular structures to divide the two rectangular structures into four orthogonally intersecting rectangular faces. The midpoints of the four sides of each rectangular face form the four endpoints of the rhombus structure. The line connecting the two vertical endpoints of each rhombus structure coincides with a support rod, which allows for adjustment of the vertical stiffness of a local area of ​​the midsole by changing the diameter of the support rod.

[0005] In some embodiments, the shoe midsole is provided with local functional parts, which are formed by a continuous array of multiple unit cell lattice structures from the shoe midsole.

[0006] In some embodiments, the midsole is detachably assembled from a midsole base and a midsole module adjacent to each other, and the outer edge of the outsole has a vertically upward extending outer flange. The midsole base and the midsole module are defined in an assembled state by the outer flange of the outsole in the outer edge region of the midsole.

[0007] In some embodiments, the midsole substrate is provided with a connecting seat and a substrate piece. The connecting seat is located at the bottom of the midsole mold piece, and the substrate piece and the midsole mold piece together form the planar shape of the shoe midsole. The top of the connecting seat and the bottom of the midsole mold piece are connected by a concave-convex structure.

[0008] In some embodiments, the base plate is configured as a Y-shape extending laterally in the arch region and with the opening facing the outside of the foot. The midsole includes a forefoot plate, an arch plate, and a heel plate. The arch plate is disposed in the opening region of the Y-shape, and the forefoot plate, arch plate, and heel plate are all adjacent to the base plate.

[0009] In some embodiments, the midsole substrate and the midsole template form a transition zone extending along the adjacent boundary in the adjacent region, and the ratio of the difference in rod diameter of the lateral and longitudinal adjacent unit cell lattices in the transition zone to the center distance of the adjacent unit cell lattices is not greater than 0.03-0.07 mm / mm.

[0010] In some embodiments, the functional part includes at least one of a metatarsal support part, a transverse arch support part, a foot arch support part, a left heel correction part, and a right heel correction part; wherein, the upper surface of the metatarsal support part is a low-slope raised curved surface, and the raised area extends laterally along the heads of the 1st to 5th metatarsal heads; the upper surface of the transverse arch support part is a smooth curved surface that gradually decreases from the center to the periphery; the foot arch support part has an arc-shaped wedge or crescent-shaped support structure, with its inner height being greater than its outer height, and its upper surface matching the curve of the inner longitudinal arch; the left heel correction part and the right heel correction part each have different wedge-shaped high lateral positions.

[0011] In some embodiments, the rod diameter variation rate of the struts of adjacent unit cells in the lateral and longitudinal directions is no greater than 0.06-0.14 mm / mm.

[0012] In some embodiments, the shoe midsole is divided into a peak pressure unloading zone, a continuous load regulation zone, and a support zone. The diameter of the struts in the unit cell lattice of the peak pressure unloading zone is set to 0.6-1.0 mm, the diameter of the struts in the unit cell lattice of the continuous load regulation zone is set to 1.0-1.2 mm, and the diameter of the struts in the unit cell lattice of the support zone is set to 1.2-1.5 mm.

[0013] In some embodiments, the system further includes an identification section disposed on the surface of the shoe midsole, the sidewall of the shoe midsole, the surface of the functional part, or within a semi-transparent unit cell lattice layer; and / or, the identification section is used to identify the location of the peak pressure unloading area, the continuous load control area, the support area, or the transition zone; and / or, the identification section is in the form of a strip, a dot matrix, a forked shape, an arc shape, or a thermal gradient shape; and / or, the identification section is implemented by printing with two-color or multi-color materials, surface coating, local dyeing, hollow texture, dot density variation, or a semi-transparent lattice method.

[0014] According to an embodiment of the present invention, a single-cell lattice structure is constructed, consisting of one cubic structure, two rectangular structures, four rhombic structures, and five support rods. This single-cell lattice structure array forms the shoe midsole, creating a spiralized herringbone multi-layered composite microstructure. This structure exhibits good initial load-bearing capacity, energy absorption potential, and compressive stability, resulting in excellent compressive response. Furthermore, the single-cell lattice structure of this embodiment allows for adjustment of the vertical stiffness of localized areas of the midsole simply by changing the diameter of the support rods, facilitating the creation of personalized sole pressure distribution schemes based on the different foot conditions of diabetic patients.

[0015] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0017] Figure 1 This is a schematic diagram of the sole of a footwear product suitable for diabetic foot according to an embodiment of the present invention; Figure 2 a is a schematic diagram of a unit cell lattice structure in one embodiment of the present invention; Figure 2 b is a 3D printed physical image of a unit cell lattice structure according to an embodiment of the present invention; Figure 3 This is a photograph of the shoe midsole according to one embodiment of the present invention; Figure 4 This is a schematic diagram of the functional parts in one embodiment of the present invention; Figure 5 a is a 10% stress cloud diagram of a unit cell lattice structure in one embodiment of the present invention; Figure 5 b is a 10% displacement cloud diagram of a unit cell lattice structure in one embodiment of the present invention; Figure 5 c is a 40% stress cloud diagram of a unit cell lattice structure in one embodiment of the present invention; Figure 5 d is a 40% displacement contour plot of the unit cell lattice structure in one embodiment of the present invention; Figure 6 This is a comparison chart of the integral pressure time of an embodiment of the present invention and the midsole of an amorphous structure shoe.

[0018] Figure label: 11: Support rod; 12: Rectangular structure; 13: Rhomboid structure; 20: Midsole; 211: Base plate; 212: Connector; 22: Forefoot plate; 221: Metatarsal support; 222: Transverse arch support; 23: Heel plate; 231: Left heel correction; 232: Right heel correction; 24: Arch plate; 241: Arch support; 31: Outer flange. Detailed Implementation

[0019] The invention will now be described with reference to several embodiments. It should be understood that these embodiments are described only to enable those skilled in the art to better understand and thus implement the invention, and are not intended to imply any limitation on the scope of the invention.

[0020] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to"; the terms "embodiment" and "one embodiment" are to be interpreted as "at least one embodiment"; the term "another embodiment" is to be interpreted as "at least one other embodiment"; the terms "first," "second," etc., may refer to different or the same objects; the term "setup" is not limited to direct or indirect connections, nor to specific connection methods. Other explicit and implicit definitions may also be included below.

[0021] Specific numerical values ​​or ranges may be referred to in the following description. It should be understood that these values ​​and ranges are merely exemplary and may be helpful in putting the ideas of the invention into practice. However, the description of these examples is not intended to limit the scope of the invention in any way. These values ​​or ranges may be set differently depending on the specific application scenario and requirements.

[0022] As mentioned above, existing footwear products cannot meet the personalized needs of diabetic patients. The footwear products for diabetic patients proposed in the embodiments of the present invention at least partially solve the above-mentioned problems. Reference will be made below. Figure 1 to- Figure 6 This describes the structure and working principle of footwear products suitable for diabetic patients according to the present invention. Figure 1 As shown, the footwear product for diabetic patients according to the present invention generally includes an upper (not shown in the figure), a midsole 20 and an outsole. The midsole 20 is located on top of the outsole, and an insole may also be provided on top of the midsole 20. The midsole 20 provides the main support for the wearer's foot.

[0023] The shoe midsole 20 of this embodiment is composed of a repetitive array of multiple unit cell lattice structures. Each unit cell lattice structure in the array is identical, and the array orientation of the unit cell lattice structures is not random, but strictly follows three directions: vertical, horizontal, and longitudinal. The vertical direction is consistent with the thickness direction of the shoe midsole 20, while the horizontal and longitudinal directions are orthogonal to each other and parallel to the plane of the shoe midsole 20. For example, the shoe midsole 20 with the unit cell lattice structure can be formed by 3D printing.

[0024] This invention proposes a novel single-cell lattice structure, such as... Figure 2 a and Figure 2 As shown in b, each unit cell lattice structure consists of a cube structure, two rectangular structures 12, four rhombic structures 13, and five support rods 11. The cube structure serves as the outer shape of the unit cell lattice, while the rectangular structures 12, rhombic structures 13, and support rods 11 are all located inside the cube structure to provide support for it. Figure 2 Figure a illustrates a coordinate system comprising horizontal (X), vertical (Y), and vertical (Z) axes. The vertical axis aligns with the height direction of the cube structure, while the horizontal and vertical axes align with the directions of two sides of the cube structure, respectively. This means that in the shoe midsole 20 composed of multiple unit cell lattice structure arrays, the edges of the cube structure of multiple unit cell lattice structures are in a state of near-coincidence when viewed from the horizontal, vertical, and other directions. It should be noted that this embodiment of the invention only strictly requires that the vertical axis align with the thickness direction of the shoe midsole 20. The horizontal and vertical axes can align with the left-right and front-back directions of the shoe midsole 20, or with a certain oblique direction between the left-right and front-back directions of the shoe midsole 20, as long as both the horizontal and vertical axes are parallel to the plane of the shoe midsole 20.

[0025] In this embodiment of the invention, the long sides of the two rectangular structures 12 form the diagonal sides of the vertical end face of the cube structure. That is, the short sides of the two rectangular structures 12 coincide with the four vertical sides of the cube structure, so that the two rectangular structures 12 are accommodated inside the cube structure in a mutually orthogonal manner. A support rod 11 is vertically set at the center of the cube structure, that is, the support rod 11 coincides with the intersection line of the two rectangular structures 12, thereby dividing the two rectangular structures 12 into four rectangular faces. The short sides of the four rectangular faces are each half of the long side of the rectangular structure 12, and the long sides of the four rectangular faces are the vertical side of the cube structure and the aforementioned support rod 11, that is, the four rectangular faces share a support rod 11 as the long side.

[0026] In this embodiment of the invention, each rhomboid structure 13 is correspondingly provided with a rectangular face, wherein the midpoints of the four sides of each rectangular face constitute the four endpoints of the corresponding rhomboid structure 13, and the line connecting the two vertical endpoints of each rhomboid structure 13 coincides with a support rod 11.

[0027] According to an embodiment of the present invention, a single-cell lattice structure array constitutes a shoe midsole 20. The microstructure of the shoe midsole 20 is constructed as a positively spiraled herringbone multilayer composite structure. This biomimetic microstructure has good initial load-bearing capacity, energy absorption potential, and compressive stability, thereby enabling the shoe midsole 20 to obtain good compressive response. Furthermore, when adjusting the stiffness of a local area of ​​the shoe midsole 20 as needed, only the diameter of the struts 11 within the vertical single-cell lattice structure of that area needs to be changed, facilitating the creation of personalized sole pressure distribution schemes based on the different foot conditions of diabetic patients. Stress and displacement analyses are performed on the single-cell lattice structure of this embodiment of the invention, such as... Figure 5 a- Figure 5 As shown in d, it can meet the requirements for foot pressure release.

[0028] In one embodiment, the inventors collect foot pressure data from diabetic patients and analyze the maximum pressure (PPP) and pressure-time integral (PTI) accordingly. The maximum pressure (PPP) is used to identify high-risk areas of instantaneous peak pressure, and the pressure-time integral (PTI) is used to identify areas of continuous load accumulation risk. The diameter of the unit cell lattice structure support rod 11 in the high-risk areas of instantaneous peak pressure is set to a smaller range to reduce the equivalent compressive stiffness of that area and release local pressure on the foot. The diameter of the unit cell lattice structure support rod 11 in the areas of continuous load accumulation risk is set to a medium range to reduce the accumulation of pressure-time integral in a single area and prevent the foot from experiencing prolonged compression in these areas. Simultaneously, the diameter of the unit cell lattice structure support rod 11 in the support area of ​​the midsole 20, which plays a major supporting role for the foot, is set to a larger range to improve walking stability. For example, the rod diameter of the support rod 11 of the unit cell lattice in the peak pressure unloading region is set to 0.6-1.0 mm, preferably 0.7 mm, 0.8 mm, or 0.9 mm; the rod diameter of the support rod 11 of the unit cell lattice in the continuous load control region is set to 1.0-1.2 mm, preferably 1.05 mm, 1.1 mm, or 1.15 mm; and the rod diameter of the support rod 11 of the unit cell lattice in the support region is set to 1.2-1.5 mm, preferably 1.25 mm, 1.3 mm, 1.35 mm, 1.4 mm, or 1.45 mm.

[0029] Based on the collected foot pressure data of diabetic patients and the data analysis, the inventors divided the sole of the foot into the big toe area, the 2nd-5th toe area, the 1st-5th metatarsal head area, the medial midfoot area, the lateral midfoot area, the medial hindfoot area, and the lateral hindfoot area. Among them, the big toe area and the 1st-5th metatarsal head area were set as the peak pressure key unloading area, the lateral midfoot area, the medial hindfoot area, and the lateral hindfoot area were set as the continuous load accumulation risk area, and the arch and other areas that need support were set as the structural support area.

[0030] To accommodate individual differences in the feet of diabetic patients, in one embodiment, the midsole 20 is provided with functional parts, which are located in local areas of the midsole 20 according to different individual conditions. It should be noted that the functional parts are integral to the midsole 20; that is, the midsole 20 is integrally molded to form the functional parts. Therefore, the functional parts are formed by a continuous array of multiple unit cell lattice structures from the midsole 20 in terms of microstructure. This arrangement ensures the stability of the functional parts structure, preventing them from easily detaching from the main structure of the midsole 20 or undergoing relative displacement. Furthermore, the vertical stiffness of the functional parts can be adjusted by setting the diameter of the support rods 11. In addition, although the functional parts protrude vertically from the plane of the midsole 20, due to their continuous microstructure, the foot can feel a smooth transition between the functional parts and the surrounding non-functional areas.

[0031] Based on the collection and analysis of foot pressure data from diabetic patients, the inventors designed five functional parts: a metatarsal support 221, a transverse arch support 222, an arch support 241, a left heel correction 231, and a right heel correction 232. Figure 4 As shown (the green area in the figure is used to identify functional parts), the upper surface of the metatarsal support 221 is a low-slope raised curved surface. The raised area extends laterally along the 1st to 5th metatarsal heads and is preferably located proximal to the metatarsal heads rather than directly below high-risk ulcer points. This can change the force path of the forefoot, dispersing the peak pressure directly below the metatarsal heads to the proximal and peripheral areas, which is suitable for individuals with metatarsal collapse or high PPP values ​​in the metatarsal head area. The transverse arch support 222 can be elliptical, rounded rectangular, or flattened frustum structure. The upper surface is a smooth curved surface that gradually decreases from the center to the periphery, which can improve the lateral support of the forefoot and improve the pressure concentration in the 2nd to 4th metatarsal head areas, which is suitable for individuals with transverse arch collapse. The arch support 241 is an arc-shaped wedge or crescent-shaped support structure. Its inner height is greater than its outer height, and its upper surface matches the curve of the medial longitudinal arch, which can improve the medial support of the midfoot and improve the load transfer between the midfoot and hindfoot, which is suitable for individuals with low arches or flat feet. The left heel correction unit 231 and the right heel correction unit 232 are used to distinguish the wedge-shaped direction and assembly position of the module. They are not limited to being used only for the left or right foot. They can adjust the contact posture of the hind foot and the force distribution on the inner and outer sides. The left heel correction unit 231 is used for individual cases of hind foot force deviation related to X-shaped legs, and the right heel correction unit 232 is used for hind foot force deviation related to O-shaped legs.

[0032] In one embodiment, the shoe midsole 20 may consist of a midsole base and a midsole template. The number of shoe midsoles 20 may be one, two, or more, and the number of midsole bases may be one, two, or more. The midsole base and the midsole template are assembled in a detachable manner. In the assembled state, the midsole base and the midsole template are adjacent to each other, thereby obtaining a complete shoe midsole 20. Wherein, as... Figure 1As shown, the outer edge of the outsole has a vertically extending outer flange 31. The outer flange 31 converges inward towards the outer edge of the midsole 20, thus ensuring a stable assembly between the midsole base and the midsole mold, preventing them from loosening or separating due to the wearer's walking. This design facilitates the provision of replaceable midsole molds based on the individual foot conditions of different diabetic patients.

[0033] In one embodiment, the midsole substrate may consist solely of the substrate piece 211, meaning that only the substrate piece 211 of the shoe midsole 20 is visible from either the top or bottom surface. In another embodiment, such as... Figure 3 As shown, the shoe midsole 20 is also provided with a connecting seat 212, which is located at the bottom of the midsole mold. The base piece 211 and the midsole mold together form the planar shape of the shoe midsole 20. The top of the connecting seat 212 is connected to the bottom of the midsole mold through a concave-convex structure. In this case, only the base piece 211 can be seen from the top surface, and only the connecting seat 212 can be seen from the bottom surface. For example, the concave-convex structure can be composed of a protrusion provided at the bottom of the midsole mold and a groove provided at the top of the connecting seat 212, or it can be composed of a groove provided at the bottom of the midsole mold and a protrusion provided at the top of the connecting seat 212. For example, the concave-convex structure can adopt a dovetail joint, T-slot, snap fastener, interference fit, or magnetic assisted positioning structure. A guide slope can be provided around the groove to allow the midsole mold to be inserted in a preset direction and maintained in position under the action of walking shear force.

[0034] For example, such as Figure 3 As shown, the shoe midsole 20 consists of one midsole base and three midsole pieces: a forefoot piece 22, an arch piece 24, and a heel piece 23. The base piece 211 of the midsole base is shaped like a Y, extending laterally in the arch area with its opening facing outwards towards the foot. The arch piece 24 is positioned within the opening of the Y-shape. The forefoot piece 22, arch piece 24, and heel piece 23 are all evenly spaced adjacent to the base piece 211. Figure 4 As shown, the metatarsal support portion 221 and the transverse arch support portion 222 are disposed on the forefoot plate 22, the arch support portion 241 is disposed on the arch plate 24, and the left heel correction portion 231 and the right heel correction portion 232 are disposed on the heel plate 23.

[0035] The substrate 211, forefoot 22, arch 24, and heel 23 have transition zones extending along their adjacent boundaries in their adjacent areas. Those skilled in the art will understand that these transition zones are merely virtual regions, and the microstructure within them is no different from that of the non-transition zone regions. In one embodiment, to ensure a smooth transition for the foot, the ratio of the difference in rod diameter between the struts 11 of adjacent lateral and longitudinal unit cells within the transition zone to the center distance between adjacent unit cells is set to no more than 0.03-0.07 mm / mm, preferably 0.04 mm, 0.05 mm, or 0.06 mm.

[0036] In one embodiment, the rod diameter variation rate of the struts 11 of the lateral and longitudinal adjacent unit cell lattices of the entire area of ​​the shoe midsole 20 is no greater than 0.06-0.14 mm / mm, preferably 0.08 mm, 0.1 mm, or 0.12 mm. This setting can reduce the risk of abrupt stiffness changes and stress concentration in the shoe midsole 20.

[0037] In one embodiment, a marking portion is provided to indicate the distribution of specific areas of the shoe midsole 20. For example, the marking portion is disposed on the surface of the shoe midsole 20, the sidewall of the shoe midsole 20, the surface of a functional part, or within a semi-transparent unit cell lattice layer; for example, the marking portion is used to mark the location of a peak pressure unloading area, a continuous load control area, a support area, or a transition zone; for example, the marking portion is in the form of a strip, a dot matrix, a forked shape, an arc shape, or a thermal gradient shape; for example, the marking portion is implemented by printing with two-color or multi-color materials, surface coating, local dyeing, hollowed-out texture, dot density variation, or a semi-transparent lattice method.

[0038] A comparative test was conducted on the performance of the single-cell lattice structure array shoe midsole 20 of this invention and the conventional homogeneous soft material shoe midsole 20, such as... Figure 6 As shown, T1 represents the big toe region, T2-3-4-5 represent the 2nd to 5th metatarsal regions, MH1 represents the 1st metatarsal head region, MH2 represents the 2nd metatarsal head region, MH3 represents the 3rd metatarsal head region, MH4 represents the 4th metatarsal head region, MH5 represents the 5th metatarsal head region, MF M represents the medial midfoot region, MF L represents the lateral midfoot region, RF M represents the medial hindfoot region, and RF L represents the lateral hindfoot region. The comparative test shown in the figure indicates that the integrated pressure time of some foot regions in the embodiment of the present invention shows a decreasing trend, especially in the forefoot, metatarsal heads and heel regions where the risk of diabetic foot ulcers is high, the pressure concentration phenomenon is alleviated.

[0039] The descriptions of the embodiments herein, including any references to directions and orientations, are for ease of description only and should not be construed as limiting the scope of the invention. The description of preferred embodiments involves combinations of features, which may exist independently or in combination; the invention is not particularly limited to the preferred embodiments. The scope of the invention is defined by the claims.

[0040] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A footwear product suitable for diabetic foot, comprising an upper, a midsole, and an outsole, characterized in that, The shoe midsole is composed of multiple unit cell lattice structures arrayed simultaneously in the vertical, horizontal, and longitudinal directions. The vertical direction is consistent with the thickness direction of the shoe midsole, while the horizontal and longitudinal directions are orthogonal to each other and parallel to the plane of the shoe midsole. Each unit cell lattice structure consists of a cube structure, two rectangular structures, four rhombus structures, and five support rods. The two rectangular structures, four rhombus structures, and five support rods are all arranged within the cube structure. The long sides of the two rectangular structures form the diagonal sides of the vertical end face of the cube. A support rod coincides with the intersection line of the two rectangular structures to divide the two rectangular structures into four orthogonally intersecting rectangular faces. The midpoints of the four sides of each rectangular face form the four endpoints of the rhombus structure. The line connecting the two vertical endpoints of each rhombus structure coincides with a support rod, which is suitable for adjusting the vertical stiffness of the local area of ​​the shoe midsole by changing the diameter of the support rod.

2. The footwear product for diabetic foot according to claim 1, characterized in that, The shoe midsole is provided with local functional parts, which are formed by a continuous array of multiple unit cell lattice structures from the shoe midsole.

3. The footwear product for diabetic foot according to claim 2, characterized in that, The shoe midsole is detachably assembled from a midsole base and a midsole module. The outer edge of the shoe outsole has a vertically upward extending outer flange. The midsole base and the midsole module are defined in an assembled state by the outer flange of the shoe outsole in the outer edge area of ​​the shoe midsole.

4. The footwear product for diabetic foot according to claim 3, characterized in that, The midsole base is provided with a connecting seat and a base piece. The connecting seat is located at the bottom of the midsole mold piece. The base piece and the midsole mold piece together form the planar shape of the shoe midsole. The top of the connecting seat and the bottom of the midsole mold piece are connected by a concave-convex structure.

5. The footwear product for diabetic foot according to claim 3, characterized in that, The base plate is configured as a Y-shape extending laterally in the arch area and with the opening facing the outside of the foot. The midsole includes a forefoot plate, an arch plate, and a heel plate. The arch plate is located in the opening area of ​​the Y-shape, and the forefoot plate, arch plate, and heel plate are all adjacent to the base plate.

6. The footwear product for diabetic foot according to claim 3, characterized in that, The midsole substrate and the midsole template form a transition zone extending along the adjacent boundary in the adjacent area. The ratio of the difference in rod diameter between the struts of the lateral and longitudinal adjacent unit cells in the transition zone to the center distance of the adjacent unit cells is no greater than 0.03-0.07 mm / mm.

7. The footwear product for diabetic foot according to claim 2, characterized in that, The functional parts include at least one of the following: metatarsal support, transverse arch support, foot arch support, left heel correction, and right heel correction; wherein, the upper surface of the metatarsal support is a low-slope raised curved surface, and the raised area extends laterally along the heads of the 1st to 5th metatarsal heads; the upper surface of the transverse arch support is a smooth curved surface that gradually decreases from the center to the periphery; the foot arch support is an arc-shaped wedge or crescent-shaped support structure, with its inner height greater than its outer height, and its upper surface matching the curve of the inner longitudinal arch; the left heel correction and the right heel correction have different wedge-shaped high lateral positions.

8. The footwear product for diabetic foot according to claim 1, characterized in that, The rate of change of the rod diameter of the struts of adjacent unit cells in the transverse and longitudinal directions is no greater than 0.06-0.14 mm / mm.

9. The footwear product for diabetic foot according to claim 1, characterized in that, The shoe midsole is divided into a peak pressure unloading zone, a continuous load control zone, and a support zone. The diameter of the rods in the unit cell lattice of the peak pressure unloading zone is set to 0.6-1.0 mm, the diameter of the rods in the unit cell lattice of the continuous load control zone is set to 1.0-1.2 mm, and the diameter of the rods in the unit cell lattice of the support zone is set to 1.2-1.5 mm.

10. The footwear product for diabetic foot according to claim 1, characterized in that, It also includes a marking section, which is set on the surface of the shoe midsole, the side wall of the shoe midsole, the surface of the functional part, or within a semi-transparent single-cell lattice layer; and / or, the marking section is used to mark the position of the peak pressure unloading area, the continuous load control area, the support area, or the transition zone; and / or, the marking section is in the form of a strip, a dot matrix, a forked shape, an arc shape, or a thermal gradient shape; and / or, the marking section is achieved by printing with two-color or multi-color materials, surface coating, local dyeing, hollow texture, dot matrix density variation, or semi-transparent lattice method.

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