Damping composite sole and shoe

Abstract

The utility model discloses a damping composite sole which comprises a midsole, the midsole comprises an upper-layer midsole and a lower-layer midsole which are arranged in an up-down stacked mode, the hardness of the upper-layer midsole is lower than that of the lower-layer midsole, the outer side of the heel portion of the upper-layer midsole has a first thickness, the inner side of the heel portion of the upper-layer midsole has a second thickness, and the first thickness is larger than the second thickness. The outer side of the heel part of the lower-layer insole has a third thickness, the inner side of the heel part of the lower-layer insole has a fourth thickness, the third thickness is smaller than the fourth thickness, the inner side of the heel part of the upper-layer insole is embedded with the inner side of the heel part of the lower-layer insole, and the outer side of the heel part of the upper-layer insole is embedded with the outer side of the heel part of the lower-layer insole; in addition, the utility model further discloses a shoe using the sole. According to the utility model, plantar pressure can be effectively absorbed, the injury risk caused by high impact and high loading rate of heel landing can be relieved, meanwhile, stable support is provided for the inner side of the heel, and the knee joint is protected.

Description

Technical Field

[0001] The utility model relates to the field of shoes, in particular to a shock-absorbing composite sole and a shoe. Background Art

[0002] As people's health awareness increases, more and more people are participating in sports activities. Running is one of the sports that the public often participates in. As the number of female runners gradually increases, more and more sports brands have begun to increase the research and development of female sports equipment, including sports bras, sports jackets, etc., to better fit the characteristics of female body structures. Running shoes are important sports equipment in running sports, which can provide protection for the feet to avoid external injuries, buffer the force on the human body, and improve sports performance.

[0003] Current running shoes and female runners have the following characteristics: (1) Common sports injuries in running, such as tibial stress fractures (or pain), patellofemoral joint pain, and plantar fasciitis, are all related to the high impact and high loading rate during the heel landing phase. Within 50ms after the human foot lands, the human body can only rely on the body structure (such as cartilage, tendons, etc.) and the midsole of the shoe to absorb the impact of landing. (2) Female muscles account for 35% of the total body weight. The strength and total amount of female muscles are 25% to 30% less than that of males. Their quadriceps muscles are relatively weaker, and the quadriceps muscles are mainly involved in the cushioning of the landing phase. The cushioning effect of the landing phase is significantly correlated with common sports injuries in running. For common sports injuries such as patellofemoral pain syndrome, stress fractures, plantar fasciitis, iliotibial band syndrome, or gluteus medius injury, the incidence of female runners is almost twice that of male runners. (3) Currently, most of the research and development of running shoes is based on male runners. Later, they are only adjusted according to the shoe lasts and colors of women. There are very few functional running shoes designed specifically for the female body structure. Since the female body structure is significantly different from that of men, these running shoes cannot meet the running needs of female runners and it is difficult to provide reasonable and sufficient sports protection for female runners.

[0004] Therefore, designing the running shoe structure based on the physiological characteristics of women can ensure that the running shoes have both shock absorption and support while more scientifically improving the protective features of the shoes, which is of great significance to female runners. Utility Model Content

[0005] The purpose of the utility model is to provide a shock-absorbing composite sole and shoe, so that the sole can combine the characteristics of the female physiological structure and the movement characteristics in running, while better taking into account shock absorption and support, and improving the protection of female runners.

[0006] A shock-absorbing composite sole comprises a midsole, wherein the midsole comprises an upper midsole and a lower midsole which are stacked up and down, wherein the hardness of the upper midsole is lower than that of the lower midsole, wherein the outer side of the heel portion of the upper midsole has a first thickness, and the inner side of the heel portion has a second thickness, wherein the first thickness is greater than the second thickness, wherein the outer side of the heel portion of the lower midsole has a third thickness, and the inner side of the heel portion of the lower midsole has a fourth thickness, wherein the third thickness is less than the fourth thickness, wherein the inner side of the heel portion of the upper midsole is interlocked with the inner side of the heel portion of the lower midsole, and the outer side of the heel portion of the upper midsole is interlocked with the outer side of the heel portion of the lower midsole, thereby jointly constituting the heel portion of the midsole.

[0007] Furthermore, the outer side of the heel of the upper midsole protrudes downward to form a first elastic part, and a first filling space is formed on the outer side of the heel of the lower midsole. The first elastic part of the upper midsole is embedded in the first filling space of the lower midsole, so that the heel parts of the upper midsole and the lower midsole are embedded with each other.

[0008] Furthermore, the first elastic portion of the upper midsole is extended toward the ground in the first filling space of the lower midsole so that the lower surface of the first elastic portion and the lower surface of the inner side of the heel portion of the lower midsole are located in the same plane, and the lower surface of the first elastic portion and the lower surface of the inner side of the heel portion of the lower midsole together constitute the lower surface of the heel portion of the midsole.

[0009] Furthermore, the first elastic portion includes an arc-shaped edge, the first end of the arc-shaped edge extends to the edge of the heel of the upper midsole, and the second end extends to the side edge of the upper midsole corresponding to the outside of the human foot. The first end and the second end are connected in an arc-shaped transition to form an arc-shaped edge, so that the first elastic portion has a fan-shaped structure as a whole.

[0010] Furthermore, the distance between the second end of the arcuate edge of the first elastic part and the end of the upper midsole heel is 90mm-110mm, and the distance between the first end of the arcuate edge of the first elastic part and the outer side of the upper midsole heel is 55mm-65mm.

[0011] Furthermore, the inner side of the heel of the lower midsole protrudes upward to form a second elastic part, and a second filling space is formed on the inner side of the heel of the upper midsole. The second elastic part of the lower midsole is embedded in the second filling space of the upper midsole, so that the heel parts of the upper midsole and the lower midsole are embedded with each other.

[0012] Furthermore, the connecting surface between the second elastic part of the lower midsole and the upper midsole is an inclined slope, the higher side of the slope extends to the inner wall of the midsole, and the lower side of the slope extends to the lower surface of the midsole.

[0013] Furthermore, the lower surface of the first elastic portion occupies 5 / 9 to 7 / 9 of the lower surface area of ​​the heel portion of the midsole.

[0014] Furthermore, a weight-reducing and buffering unit is provided at the forefoot portion of the upper midsole. The weight-reducing and buffering unit includes a plurality of hexagonal honeycomb structures arranged side by side, and a separation groove is formed between two adjacent hexagonal honeycomb structures.

[0015] Furthermore, at least one reinforcing rib is provided on the lower surface of the forefoot portion of the lower midsole, and the reinforcing rib is extended along the horizontal direction of the lower midsole to increase the rebound effect of the forefoot portion.

[0016] Furthermore, a support sheet is fitted below or above the midsole, and the support sheet includes a first support strip located on the inner side of the sole and extending toward the toe and heel respectively, a second support strip located on the outer side of the sole and extending toward the toe and heel respectively, and a connecting portion connecting the first support strip and the second support strip, and the connecting portion is located in the midfoot.

[0017] Furthermore, the length of the first support bar is greater than that of the second support bar, one end of the first support bar extends to the location of the big toe of the human foot, and the first support bar is in a raised structure in the direction extending toward the toes to fit the shape of the human arch.

[0018] Furthermore, the length of the first support bar ranges from 150 cm to 170 cm, and the length of the second support bar ranges from 75 cm to 85 cm.

[0019] Another aspect of the present invention provides a shoe comprising the shock-absorbing composite sole described in the above items.

[0020] The shock-absorbing composite sole and shoe of the utility model adopt a material with low hardness as the upper midsole and a material with high hardness as the lower midsole, while increasing the supporting performance of the inner side of the heel and the shock-absorbing performance of the outer side of the heel, so that the first elastic part can effectively absorb the pressure on the sole of the foot and alleviate the risk of injury caused by the high impact and high loading rate of the heel landing, and the second elastic part can provide stable support for the inner side of the heel and play a certain protective role on the female knee joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a side view of the outer side of the shock-absorbing composite sole according to an embodiment of the utility model.

[0022] Figure 2 This is a medial side view of the shock-absorbing composite sole according to an embodiment of the utility model.

[0023] Figure 3 This is an exploded view of the shock-absorbing composite sole according to an embodiment of the utility model.

[0024] Figure 4 shows the biomechanical data of female runners at a slow speed (3.3 m / s).

[0025] Figure 5It is a cross-sectional view of the heel portion of the shock-absorbing composite sole according to an embodiment of the utility model.

[0026] Figure 6 It is a schematic diagram of deformation curves of the upper midsole and the lower midsole under different stresses according to an embodiment of the utility model.

[0027] Figure 7 It is a three-dimensional diagram of the upper midsole of an embodiment of the utility model.

[0028] Figure 8 The bottom view of the upper midsole of the embodiment of the utility model.

[0029] Fig. 9 It is a side view of the upper midsole of an embodiment of the utility model.

[0030] Fig.10 It is a bottom view of the lower midsole of an embodiment of the utility model.

[0031] Fig.11 It is a three-dimensional diagram of a support sheet according to an embodiment of the utility model.

[0032] Fig.12 It is a side view of the support sheet according to an embodiment of the utility model.

[0033] Fig.13 This is a top view of the support sheet according to an embodiment of the present invention. DETAILED DESCRIPTION

[0034] In order to better understand the purpose, structure and function of the utility model, the shock-absorbing composite sole and the shoe of the utility model are further described in detail below in conjunction with the accompanying drawings.

[0035] like Figures 1 to 3 As shown, the shock-absorbing composite sole provided by the embodiment of the utility model comprises a midsole, a support sheet 3 and an outer sole 4 arranged in sequence from top to bottom. Among them, the midsole comprises an upper midsole 1 and a lower midsole 2 stacked up and down, and the hardness of the upper midsole 1 is lower than that of the lower midsole 2. The outer side of the heel part of the upper midsole 1 has a first thickness, and the inner side of the heel part has a second thickness, and the first thickness is greater than the second thickness. The outer side of the heel part of the lower midsole 2 has a third thickness, and the inner side of the heel part has a fourth thickness, and the third thickness is less than the fourth thickness. The inner side of the heel part of the upper midsole 1 and the inner side of the heel part of the lower midsole 2 are mutually embedded, and the outer side of the heel part of the upper midsole 1 and the outer side of the heel part of the lower midsole 2 are mutually embedded, so as to jointly constitute the heel part of the midsole.

[0036] The shoe soles set in the above manner are conducive to providing better sports protection for female runners. Figure 4 shows the biomechanical data of female runners at a slow speed (3.3m / s), where 4-A is a schematic diagram of the ground reaction force in the forward direction during the single-step landing period. The single-step landing period is divided into a braking period and a stretching period, and the stretching period begins after the braking period. The braking period is within 50ms after landing, and the plantar pressure diagram during the braking period is shown in Figure 4-B. At this time, the human body can only rely on its own structures such as cartilage and tendons and the midsole of the shoe to absorb the impact of landing, and the impact area is concentrated on the outside of the heel.

[0037] As shown in Figures 4-B and 4-C, the characteristic of running is that the outer side of the heel rolls forward after landing, accompanied by a certain degree of internal rotation and pushing off the ground. The degree of activation of the hamstring strength of women is lower than that of men, which will directly affect the coordinated contraction of the quadriceps and hamstrings, thereby reducing the control of the knee joint. The strength of the anterior and posterior cruciate ligaments of women is lower than that of men, resulting in more anterior and posterior displacement of the tibia during the swing period of running than men, and the chance of knee ligament injury will also increase. When running, the valgus angle of women's knee joints will be larger than that of men, and they are more likely to suffer from knee pain injuries. Therefore, women need more support on the inside during running.

[0038] Based on the physiological structure characteristics of the above-mentioned female runners, the sole in the utility model improves the resilience performance of the outer area of ​​the heel part of the sole by thickening the thickness of the upper midsole 1 with lower hardness and better resilience in the outer area of ​​the heel part, thereby better cushioning the high impact and high loading rate of the heel landing for female runners and reducing the risk of injury; and improves the support performance of the inner area of ​​the heel part of the sole by thickening the thickness of the lower midsole 2 with higher hardness and better support in the inner area of ​​the heel part, thereby playing a certain protective role for the female knee joint and reducing knee joint injuries.

[0039] Specifically, the upper midsole 1 is a full-palm structure, including a forefoot portion, a midfoot portion and a heel portion. The outer side of the heel portion of the upper midsole 1 is convexly arranged downward to form a first elastic portion 1.1, and a first filling space is formed on the outer side of the heel portion of the lower midsole 2. The first elastic portion 1.1 of the upper midsole 1 is embedded in the first filling space of the lower midsole 2, so that the heel portions of the upper midsole 1 and the lower midsole 2 are embedded with each other.

[0040] The inner side of the heel of the lower midsole 2 protrudes upward to form a second elastic part 2.1, and a second filling space is formed on the inner side of the heel of the upper midsole 1. The second elastic part 2.1 of the lower midsole 2 is embedded in the second filling space of the upper midsole 1, so that the heels of the upper midsole 1 and the lower midsole 2 are embedded with each other.

[0041] Of course, the heel part of the sole of the present invention can also be provided with the first elastic part 1.1 only on the outside of the heel part, or the second elastic part 2.1 only on the inside of the heel part, preferably, the second elastic part 2.1 and the first elastic part 1.1 are provided on the inside and outside of the heel part respectively. The above-mentioned interlocking method is used to provide the heel part of the midsole, which can improve the stability of the connection between the upper midsole 1 and the lower midsole 2, and make the transition between the cushioning and support of the heel part of the midsole stable.

[0042] Furthermore, the first elastic part 1.1 of the upper midsole 1 is extended in the first filling space of the lower midsole 2 toward the ground, so that the lower surface of the first elastic part 1.1 and the lower surface of the inner side of the heel of the lower midsole 2 are located in the same plane, and the lower surface of the first elastic part 1.1 and the lower surface of the inner side of the heel of the lower midsole 2 together constitute the lower surface of the heel of the midsole. This arrangement can maximize the thickness of the upper midsole 1 on the outer side of the heel of the sole, so that the cushioning performance of the outer side of the heel is maximized. Of course, the above arrangement is a preferred arrangement. In addition, the lower midsole 2 can be designed as a full-palm structure so that the upper midsole 1 and the lower midsole are completely embedded in the heel.

[0043] Furthermore, if Figure 5-Figure 10 As shown, the first elastic portion 1.1 includes an arc-shaped edge, a first end of the arc-shaped edge extends to the edge of the heel of the upper midsole 1, and a second end extends to the side edge of the upper midsole 1 corresponding to the outside of the human foot. The first end and the second end are connected in an arc-shaped transition to form an arc-shaped edge, so that the first elastic portion 1.1 has a fan-shaped structure as a whole.

[0044] Preferably, the distance between the second end of the arcuate edge of the first elastic part and the end of the upper midsole heel is 90mm-110mm, and the distance between the first end of the arcuate edge of the first elastic part and the outer side of the upper midsole heel is 55mm-65mm.

[0045] As shown in Figure 4-B, the plantar pressure diagram of the braking period within 50ms after the human foot lands on the ground, during this period of time, the human body can only absorb the impact of landing through its own body structure and the cushioning of the sole, and the main area where the foot receives the impact force is the fan-shaped area shown in the figure. The first elastic part 1.1 provided by the utility model is a shock-absorbing structure formed by setting the plantar pressure data within 50ms of landing with reference to the data. By matching the shape and setting area of ​​the first elastic part 1.1 with the main area of ​​plantar pressure distribution in the heel part during the braking period, it can better cushion the risk of injury caused by the high impact and high loading rate of the heel landing when jogging for women, and enhance the cushioning effect of the first elastic part 1.1.

[0046] In the above-mentioned sole structure, the upper midsole 1 and the lower midsole 2 are made by supercritical foaming or chemical foaming molding process, the upper midsole 1 is the proximal end of the foot, and the first elastic part 1.1 is the main shock-absorbing area. The regional shape design combines the academic research on the landing method during running and the plantar pressure plate data setting that mainly absorbs the landing impact, making the shock-absorbing effect more scientific.

[0047] Furthermore, the connection surface between the second elastic part 2.1 of the lower midsole 2 and the upper midsole 1 is an inclined plane, the higher side of the inclined plane extends to the inner wall of the midsole, and the lower side of the inclined plane extends to the lower surface of the midsole. The second elastic part 2.1 of the lower midsole 2 of the utility model serves as a support part on the inner side of the heel, has better support, and can achieve the purpose of increasing the dynamic stability support on the inner side of the heel through the inclined plane connection, thereby enhancing the protection of the female knee joint.

[0048] Preferably, in combination with the academic research on the landing mode during running and the data setting of the sole pressure plate that mainly absorbs the landing impact, the lower surface of the first elastic part 1.1 accounts for 5 / 9 to 7 / 9 of the lower surface area of ​​the midsole heel, and the lower surface of the second elastic part 2.1 accounts for 2 / 9 to 4 / 9 of the lower surface area of ​​the midsole heel. Among them, the distance between the second end of the upper arc edge of the first elastic part 1.1 and the end of the heel of the upper midsole 1 is 90mm to 110mm, and the distance between the first end of the upper arc edge of the first elastic part 1.1 and the outer side of the heel of the upper midsole 1 is 55mm to 65mm.

[0049] The utility model forms the heel part of the midsole by interlocking the first elastic part 1.1 and the second elastic part 2.1, which can not only provide a buffer area scientifically, but also realize the dynamic support of the material. The dynamic support is realized as follows: the hardness of the upper midsole 1 is lower than that of the lower midsole 2. The low hardness (soft elastic material) will increase the dynamic foot comfort of the runner during running. The deformation of the upper midsole 1 and the lower midsole 2 under different stresses is as follows: Figure 6 As shown, under low stress and low deformation conditions such as standing and walking, the two materials of the upper midsole 1 and the lower midsole 2 have similar support, avoiding the risk of flat-footed runners hitting their feet ( Figure 6 Medium grey shaded area). Under the same high stress conditions of running, the midsole 2 has a smaller deformation than the upper midsole 1 and has better support to achieve the purpose of dynamic stable support.

[0050] Furthermore, the forefoot portion of the upper midsole 1 of the embodiment of the utility model is also provided with a weight reduction buffer unit 1.2, which includes a plurality of hexagonal honeycomb structures arranged side by side, and a separation groove is formed between two adjacent hexagonal honeycomb structures. The weight reduction buffer unit 1.2 can increase the deformation space during exercise, and the deformation is more balanced, thereby improving the shock absorption performance and forefoot feel, and scientifically reducing weight.

[0051] Furthermore, the upper midsole 1 provided in the embodiment of the utility model is made of one, two or more materials selected from nylon elastomer, polyurethane (thermoplastic polyurethane (including aromatic and aliphatic types), cast polyurethane, mixed polyurethane), thermoplastic polyether ester elastomer, ethylene-octene copolymer, ethylene-octene block copolymer, ethylene-vinyl acetate copolymer, styrene-butadiene-styrene block copolymer, hydrogenated styrene-butadiene-styrene block copolymer, high styrene rubber, brominated butyl rubber, butadiene rubber, silicone rubber, EPDM rubber, natural rubber, isoprene rubber, nitrile rubber, and chloroprene rubber. It is characterized by a hardness of 35-50C and a density of 0.10-0.20g / cm 3 .

[0052] Furthermore, if Fig.10 As shown, the lower surface of the forefoot portion of the lower midsole 2 of the present invention is provided with at least one reinforcing rib 2.2, and the reinforcing rib 2.2 is used to increase the rebound effect of the forefoot portion.

[0053] Furthermore, the lower midsole 2 provided in the embodiment of the utility model is made of one, two or more materials selected from nylon elastomer, polyurethane (thermoplastic polyurethane (including aromatic and aliphatic types), cast polyurethane, mixed polyurethane), thermoplastic polyether ester elastomer, ethylene-octene copolymer, ethylene-octene block copolymer, ethylene-vinyl acetate copolymer, styrene-butadiene-styrene block copolymer, hydrogenated styrene-butadiene-styrene block copolymer, high styrene rubber, brominated butyl rubber, butadiene rubber, silicone rubber, EPDM rubber, natural rubber, isoprene rubber, nitrile rubber, and chloroprene rubber. It is characterized by a hardness of 35-50C and a density of 0.10-0.20g / cm 3 .

[0054] Furthermore, the embodiment of the utility model also provides a support sheet 3, which is arranged below the midsole, or above the midsole, or between the upper midsole 1 and the lower midsole 2. The support sheet 3 is a hard support layer, which can provide more stable plantar support for female runners.

[0055] like Figure 11-13As shown, the support sheet 3 includes a first support bar 3.1 located on the inner side of the sole and extending toward the toe and the heel respectively, a second support bar 3.2 located on the outer side of the sole and extending toward the toe and the heel respectively, and a connecting portion 3.3 connecting the first support bar 3.1 and the second support bar 3.2. The connecting portion 3.3 is located in the midfoot so that the support sheet 3 has an H-shaped structure as a whole. The support sheet 3 is a hard support layer. The shape design of the hard support layer is based on the physiological structure of women and the higher demand for stable support during running. The front end of the first support bar 3.1 extends to the forefoot to correspond to about 50% of the plantar pressure diagram during the landing period, providing stable support for the extension period.

[0056] Furthermore, the length of the first support bar 3.1 is greater than that of the second support bar 3.2, and one end of the first support bar 3.1 extends to the position of the big toe of the human foot. The first support bar 3.1 is in a raised structure in the direction extending toward the toes to fit the structure of the human arch and provide more stable and fitting support for the sole of the foot.

[0057] Furthermore, because the activation degree of women's hamstring strength is lower than that of men, it will directly affect the coordinated contraction of the quadriceps and hamstrings, thereby reducing the protective effect on the knee joint. The strength of the anterior and posterior cruciate ligaments of women is lower than that of men, resulting in more anterior and posterior displacement of the tibia during the swing period of running, and the probability of knee ligament injury will also increase. When running, the valgus angle of women's knee joints will be larger than that of men, and they are more likely to suffer knee pain. Therefore, the length of the first support bar 3.1 is greater than that of the second support bar 3.2. The length range of the first support bar 3.1 is 150cm to 170cm, and the length range of the second support bar 3.2 is 75cm to 85cm. During the process of running, the heel rolls to the forefoot to a certain extent, and the support of the inner side is increased. The width of the support bar at the connection position of the connection part 3.3 is 45±5cm, which increases the rigidity of the middle waist, improves the arch support and anti-torsion performance, and at the same time strengthens the rolling smoothness and extension from the heel to the forefoot.

[0058] Furthermore, a groove structure is formed on the midsole, and the contour of the groove structure corresponds to the outer contour of the support sheet 3 at the corresponding position, so that the support sheet 3 can be embedded in the groove structure to increase the fit between the support sheet 3 and the midsole.

[0059] It should be noted that the specific position of the groove on the midsole is related to the position of the support sheet 3. Figure 8 and Fig.10As shown, when the support sheet 3 is located below the lower midsole 2, the groove structure is related to the contour line of the fitting position of the upper midsole 1 and the lower midsole 2, and the groove structure can be located entirely on the lower surface of the lower midsole 2, or on the lower surface of the lower midsole 2 and the lower surface of the upper midsole 1. In a specific embodiment of the utility model, the groove structure includes a first groove structure 1.3 located on the upper midsole 1 and a second groove structure 2.3 located on the lower midsole 2.

[0060] Furthermore, the material of the support strip is characterized by a Shore D hardness of 50-95, and is a support plate made of other hard materials, such as a composite material formed by phenolic resin or thermoplastic resin (thermoplastic polyurethane, polycarbonate, polymethyl methacrylate, nylon elastomer, polyether ester elastomer, polyketone, polyether ether ketone, polyether ketone ketone, polyether sulfone, polyphenylene sulfide, ABS (acrylonitrile-butadiene-styrene copolymer).

[0061] Furthermore, an outer sole 4 is arranged below the midsole, and the outer sole 4 is attached to the lower surface of the midsole. In a preferred embodiment of the present invention, the outer sole 4 is a patch structure, attached to the lower surface of the midsole.

[0062] In order to further reduce the weight of the sole, the outsole 4 includes a forefoot patch and a heel patch. The forefoot patch is bonded to the lower surface of the forefoot part of the midsole, and the heel patch includes two pieces, which are respectively bonded to the lower surface of the first elastic part 1.1 and the lower surface of the second elastic part 2.1.

[0063] Furthermore, the lower sole is made of a material with excellent anti-slip properties and fatigue wear resistance, and the patch structure can meet the requirements of using the thinnest thickness as the outer sole to meet the actual running sports needs, effectively reducing the thickness and weight of the sole, achieving the functional requirements of lightweight shoes, and providing the wearer with a better wearing experience. The overall thickness of the heel of the shock-absorbing composite sole provided by the utility model has a value range of 28±3mm.

[0064] Further, the material of the outsole 4 is one or more rubber or elastomer materials selected from styrene-butadiene rubber, brominated butyl rubber, butadiene rubber, silicone rubber, EPDM rubber, natural rubber, isoprene rubber, nitrile rubber, chloroprene rubber, nylon elastomer, polyurethane (thermoplastic polyurethane (including aromatic and aliphatic types), cast polyurethane, mixed polyurethane), thermoplastic polyether ester elastomer, ethylene-octene copolymer, ethylene-octene block copolymer, ethylene-vinyl acetate copolymer, styrene-butadiene-styrene block copolymer, hydrogenated styrene-butadiene-styrene block copolymer, and high styrene rubber. Two or more materials are used to make one or more rubber or elastomer materials.

[0065] The utility model also provides several specific embodiments for selecting the shock-absorbing composite sole material:

[0066] Preferred embodiment 1: the upper midsole 1 is made of one or a blend of two or more of EVA, SEBS, EDPM, POE, OBC, and nylon elastomer, with a density of 0.12-0.15 g / cm 3 , Shore C hardness 40-45, rebound rate (Energyreturn) 70-72%, peak acceleration (Peak G) 7.5-8.6, the upper midsole 1 can provide better shock absorption. The lower midsole 2 is made of nylon elastomer or polyurethane material, which has the advantage of density of 0.12-0.14g / cm 3 , Shore C hardness is 40-45, rebound rate (Energyreturn) is 78-80%, peak acceleration (Peak G) is 8.9-10.1; it provides light + high elastic effect, suitable for moderate weight. The support plate 3 uses 60-65D, thermoplastic polyurethane (TPU), elongation 500%, density 1.25%, tear strength 240N / mm. The outsole 4 is one or a blend of two or more of styrene-butadiene rubber, butadiene rubber, styrene-butadiene block polymer, polyurethane, nitrile rubber, and natural rubber, and has excellent wear resistance. The properties are as follows: hardness (Shore A) 62, density 0.92g / cm 3 , tensile strength 11.2MPa, elongation at break 412%, right-angle tear strength 43N / mm, Akron, DIN abrasion 34mm 3 , yellowing resistance level 4, aging resistance level 4, dry slip 1.01, wet slip 0.59.

[0067] Preferred embodiment 2: the upper midsole 1 is made of one or a blend of two or more of EVA, SEBS, EDPM, POE, OBC, or nylon elastomer, with a density of 0.10-0.12 g / cm 3 , Shore C hardness 35-40, rebound rate (Energyreturn) 72-75%, peak acceleration (Peak G) 6.8-7.4, providing better shock absorption. The lower midsole 2 is made of nylon elastomer or polyurethane material, which has the advantage of density of 0.11-0.13g / cm 3 , Shore C hardness is 35-40, rebound rate (Energyreturn) is 79-82%, peak acceleration (Peak G) is 7.8-9.3; providing lighter + high elasticity + more shock-absorbing effect, suitable for lighter weight. The materials of the support plate 3 and the outsole 4 are the same as those of the preferred embodiment 1.

[0068] Preferred embodiment 3: the upper midsole 1 is made of one or a blend of two or more of EVA, SEBS, EDPM, POE, OBC, or nylon elastomer, with a density of 0.15-0.17 g / cm 3, Shore C hardness 45-50, rebound rate (Energyreturn) 67-70%, peak acceleration (Peak G) 8.9-9.6, providing shock absorption. The lower midsole 2 is made of nylon elastomer or polyurethane material, which has the advantage of density of 0.14-0.16g / cm 3 , Shore C hardness is 45-50, rebound rate (Energyreturn) is 76-78%, peak acceleration (Peak G) is 9.2-10.8; it provides light + high elastic effect, suitable for heavier weight. The materials of the support plate 3 and the outer sole 4 are the same as those of the preferred embodiment 1.

[0069] It can be seen from the above preferred embodiments that by reasonably selecting the materials of the upper midsole 1, the lower midsole 2, the support plate 3 and the outsole, women with different body shapes or sports characteristics can further purchase women's running shoes that suit their own characteristics.

[0070] In order to verify the performance of the shock-absorbing composite sole of the utility model, a test shoe and a comparison shoe made of the shock-absorbing composite sole are selected for testing and comparison to compare their shock-absorbing performance, stable support and the difference in the risk of knee joint injury;

[0071] Table 1

[0072]

[0073] As shown in Table 1, the results of the shock absorption index (peak heel acceleration and first peak average loading rate, the smaller the better) show that the test shoes can effectively reduce the ground impact force and impact loading rate of the human body when running. The results of the stability index (maximum eversion velocity of the ankle joint, maximum eversion angle of the ankle joint, eversion range of the ankle joint, and maximum angular velocity of the foot. The first three indicators are related to stability, and the latter two indicators are related to the smoothness of the midfoot transition and support. Within a certain range, the smaller the value, the better) show that compared with the comparison shoes, the maximum eversion angle and maximum eversion velocity of the test shoes are significantly reduced by about 38% and 21%, respectively, which can effectively enhance its stability. The results of the knee joint injury risk index (maximum knee joint abduction torque, within a certain range, the smaller the value of this index, the smaller the injury risk) show that compared with the comparison shoes, the maximum abduction torque of the test shoes is reduced by about 12%, which significantly reduces the risk of knee joint injury. In summary, biomechanical data show that the parameter settings of the pre-research products are consistent with the expected goals. While better balancing cushioning and support, it more scientifically improves the protective features of the shoes, which is of great significance for female runners.

[0074] The shock-absorbing composite sole and shoe of the utility model use a material with low hardness as the upper midsole and a material with high hardness as the lower midsole, so that the first elastic part can effectively absorb the pressure on the sole of the foot and alleviate the risk of injury caused by the high impact and high loading rate of the heel landing, and the second elastic part can provide stable support for the inner side of the heel and play a certain protective role on the female knee joint.

[0075] The utility model is further described above with the help of specific embodiments, but it should be understood that the specific description here should not be understood as limiting the essence and scope of the utility model. Various modifications made to the above embodiments by ordinary technicians in this field after reading this specification are all within the scope of protection of the utility model. The various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the various possible combinations of the embodiments of the utility model will not be described separately.

[0076] If the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

Claims

1. A shock-absorbing composite sole, characterized in that: The invention comprises a midsole, wherein the midsole comprises an upper midsole and a lower midsole which are stacked up and down, the hardness of the upper midsole is lower than that of the lower midsole, the outer side of the heel portion of the upper midsole has a first thickness, the inner side of the heel portion has a second thickness, and the first thickness is greater than the second thickness, the outer side of the heel portion of the lower midsole has a third thickness, the inner side of the heel portion of the lower midsole has a fourth thickness, and the third thickness is less than the fourth thickness, the inner side of the heel portion of the upper midsole is interlocked with the inner side of the heel portion of the lower midsole, and the outer side of the heel portion of the upper midsole is interlocked with the outer side of the heel portion of the lower midsole, so as to jointly constitute the heel portion of the midsole.

2. The shock-absorbing composite sole according to claim 1, characterized in that: The outer side of the heel of the upper midsole protrudes downward to form a first elastic part, and a first filling space is formed on the outer side of the heel of the lower midsole. The first elastic part of the upper midsole is embedded in the first filling space of the lower midsole, so that the heels of the upper midsole and the lower midsole are embedded with each other.

3. The shock-absorbing composite sole according to claim 2, characterized in that: The first elastic part of the upper midsole is extended toward the ground in the first filling space of the lower midsole so that the lower surface of the first elastic part and the lower surface of the inner side of the heel part of the lower midsole are located in the same plane, and the lower surface of the first elastic part and the lower surface of the inner side of the heel part of the lower midsole together constitute the lower surface of the heel part of the midsole.

4. The shock-absorbing composite sole according to claim 2 or 3, characterized in that: The first elastic portion includes an arc-shaped edge, the first end of the arc-shaped edge extends to the edge of the heel of the upper midsole, and the second end extends to the side edge of the upper midsole corresponding to the outside of the human foot. The first end and the second end are connected in an arc-shaped transition to form an arc-shaped edge, so that the first elastic portion has a fan-shaped structure as a whole.

5. The shock-absorbing composite sole according to claim 4, characterized in that: The distance between the second end of the arcuate edge of the first elastic part and the end of the upper midsole heel is 90mm-110mm, and the distance between the first end of the arcuate edge of the first elastic part and the outer side of the upper midsole heel is 55mm-65mm.

6. The shock-absorbing composite sole according to claim 4, characterized in that: The inner side of the heel of the lower midsole protrudes upward to form a second elastic part, and a second filling space is formed on the inner side of the heel of the upper midsole. The second elastic part of the lower midsole is embedded in the second filling space of the upper midsole, so that the heels of the upper midsole and the lower midsole are embedded with each other.

7. The shock-absorbing composite sole according to claim 6, characterized in that: The connecting surface between the second elastic part of the lower midsole and the upper midsole is an inclined surface, the higher side of the inclined surface extends to the inner side wall of the midsole, and the lower side of the inclined surface extends to the lower surface of the midsole.

8. The shock-absorbing composite sole according to claim 4, characterized in that: The lower surface of the first elastic part occupies 5 / 9 to 7 / 9 of the lower surface area of ​​the heel part of the midsole.

9. The shock-absorbing composite sole according to any one of claims 1 to 3, characterized in that: A weight-reducing and buffering unit is arranged at the forefoot portion of the upper midsole. The weight-reducing and buffering unit includes a plurality of hexagonal honeycomb structures arranged side by side, and a separation groove is formed between two adjacent hexagonal honeycomb structures.

10. The shock absorbing composite sole according to any one of claims 1 to 3, characterized in that: At least one reinforcing rib is arranged on the lower surface of the forefoot portion of the lower midsole, and the reinforcing rib is extended along the horizontal direction of the lower midsole to increase the rebound effect of the forefoot portion.

11. The shock absorbing composite sole according to any one of claims 1 to 3, characterized in that: A support sheet is fitted below or above the midsole, and the support sheet includes a first support strip located on the inner side of the sole and extending toward the toe and heel respectively, a second support strip located on the outer side of the sole and extending toward the toe and heel respectively, and a connecting portion connecting the first support strip and the second support strip, and the connecting portion is located in the midfoot.

12. The shock-absorbing composite sole according to claim 11, characterized in that: The length of the first support bar is greater than that of the second support bar. One end of the first support bar extends to the location of the big toe of the human foot. The first support bar is in a raised structure in the direction extending toward the toes to fit the shape of the human arch.

13. The shock-absorbing composite sole according to claim 11, characterized in that: The length of the first support bar ranges from 150 cm to 170 cm, and the length of the second support bar ranges from 75 cm to 85 cm.

14. A shoe, characterized in that: The invention comprises the shock-absorbing composite sole according to any one of claims 1 to 13.

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