Carbon plate for sole, sole of sneaker and sneaker with sole

Abstract

The utility model provides a carbon plate for a sole, a sole of a sneaker and the sneaker with the sole, the carbon plate comprises a half sole extending from a corresponding toe to a corresponding metatarsophalangeal joint with a certain curvature, and a middle waist extending from the metatarsophalangeal joint to the rear end of a corresponding arch with a certain curvature, the heel extends from the rear end of the arch to the rear end of the corresponding heel, and the half sole, the middle waist and / or the heel have inclined angles. The shoe sole is composed of a carbon plate, a shoe insole upper layer structure and a shoe insole lower layer structure. A groove for bearing a carbon plate is formed in the upper surface of the shoe insole lower layer structure, the periphery of the shoe insole lower layer structure protrudes upwards to form a peripheral wall surrounding the upper surface, and the shape of the shoe insole upper layer structure is suitable for being connected with the groove formed by the peripheral wall and the upper surface of the shoe insole lower layer structure. The carbon plate is clamped between the shoe insole upper layer structure and the shoe insole lower layer structure. The sports shoe comprises a sole of the sports shoe and is suitable for increasing the running speed by increasing the stride frequency.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of sports shoes, specifically, the utility model relates to a sports shoe capable of increasing step frequency to realize the improvement of running speed. BACKGROUND

[0002] Running is a kind of sport that is easy to start, but the running action itself is very complex. The calculation method of running speed is: speed = step frequency x step length. The speed of running is directly affected by the speed of step frequency and the size of step length. Step frequency is the number of steps per minute when running. If 170 steps are taken alternately by two feet in one minute, the step frequency is 170 steps per minute. Step length refers to the length of a step, which includes the distance of the whole process of stepping, taking off and landing. If a step is 1.8 meters, the step length is 1.8 meters per step.

[0003] Generally speaking, the faster the step frequency, the less likely it is to be injured. For ordinary runners, increasing step frequency to improve speed is not only easier to achieve, but also safer. According to research, the world's top runners usually have some common points, including shorter ground contact time, less shear stress of lower limb joints (brake force), lower vertical amplitude, and less energy consumption (more energy saving) at the same pace. These characteristics correspondingly reflect that runners tend to improve running speed by increasing step frequency.

[0004] At present, various sports shoe manufacturers provide a variety of sports shoes that can meet the needs of comfort and lightness, and can also meet the needs of improving sports performance to a certain extent through the use of air cushions, plastic elastic sheets built-in sports shoes, or external support structures, composite density materials, and the combination of different structures and materials. This can help athletes achieve better results in competitions to a certain extent. However, for competitive sports, the demand for faster running speed is endless. Athletes have increasingly high requirements for the comfort of sports shoes and the aid of sports performance, especially in terms of increasing step frequency and running speed. CONTENT OF THE UTILITY MODEL

[0005] Therefore, the utility model aims to overcome the above-mentioned defects or problems in the background art, and provides a carbon plate for a sole, a sole of a sports shoe, and a sports shoe with the same, which is suitable for increasing step frequency to realize the improvement of running speed, so that the wearer of the sports shoe has a stepping feeling when exercising and reduces fatigue during exercise.

[0006] To achieve the above object, the utility model provides a kind of carbon plate, the carbon plate is composed of front palm, middle waist, heel three parts, wherein: the front palm is from corresponding toe along longitudinal direction and extend to corresponding metatarsophalangeal joint with certain curvature;The middle waist is from metatarsophalangeal joint and extend to the rear end of corresponding arch with certain curvature along longitudinal direction;And the heel extends to the rear end of corresponding heel from arch rear end;Wherein, when observing from the side along longitudinal direction, wherein the front palm, middle waist and heel are sequentially relative to horizontal plane respectively with first included angle, second included angle and third included angle with certain inclination angle, wherein the first to third included angle is designed so that the carbon plate is generally W-shaped when observing from the side.

[0007] Therefore, compared with prior art, the deformation of the carbon plate of the utility model can correspondingly reduce the impact force when the sports shoes contact the ground.For the runner with high step frequency, the impact force exerted on the ground is less than that of the runner with high stride, and the deformation of metatarsophalangeal joint is also less than that of the runner with high stride, so that the athlete with high step frequency habit has a more comfortable experience when running in the sports shoes of the utility model.

[0008] As a preferred aspect of the utility model, when viewed from above along transverse direction, wherein the carbon plate has sequentially along longitudinal direction: the first width gradually widened from toe along transverse direction to the junction of front palm and middle waist;The second width is located at the middle position of middle waist;The third width is located at the junction of middle waist and heel;And the fourth width is located in heel;Wherein the first width to the fourth width are sequentially tapered.

[0009] As a preferred aspect of the utility model, the shape of the carbon plate is designed to be when viewed from the side along longitudinal direction: the first included angle between the tangent line of the front palm at metatarsophalangeal joint and the horizontal plane is designed to be 14 to 24 degrees;The second included angle between the tangent line of the middle waist at arch and the horizontal plane is 15 to 25 degrees;And the third included angle between the tangent line of the heel at heel and the tangent line of the middle waist curve at arch is 16 to 26 degrees.

[0010] As a preferred aspect of the utility model, wherein the first width is in the range of 60 to 70 millimeters, the second width is in the range of 40 to 45 millimeters, the third width is in the range of 35 to 40 millimeters, and the fourth width is in the range of 30 to 35 millimeters.

[0011] As a preferred aspect of the utility model, the front palm and the heel have a difference in the range of 15 to 20 millimeters.

[0012] As a preferred aspect of the utility model, wherein when viewed from the side along longitudinal direction, wherein the front palm has a length of about 70 to 80 millimeters, wherein the middle waist has a length of about 60 to 70 millimeters, and wherein the heel has a length of about 80 millimeters.

[0013] As another aspect of the present application, the present application also provides a sole of sports shoes, comprising a midsole, the midsole comprises a midsole upper layer structure above the sole and a midsole lower layer structure below the sole, characterized in that the carbon plate is arranged between the midsole upper layer structure and the midsole lower layer structure.

[0014] Therefore, compared with the prior art, the sole of the present application provides more cushioning for runners during running, thereby reducing the impact force when the sports shoes contact the ground, and the elasticity of the midsole provides higher take-off for athletes. Therefore, compared with the prior art, the present application has more excellent propulsion performance and ejection performance, and further has the characteristics of high step frequency and low step length, so the present application is more suitable for athletes who have the characteristics of increasing the running speed by increasing the step frequency

[0015] As a preferred aspect of the present application, the midsole lower layer structure has a groove for bearing the carbon plate and engaging with the carbon plate, wherein the groove is defined by the midsole lower layer structure protruding upward along the circumference thereof and forming a circumferential wall around the upper surface; and wherein the shape of the midsole upper layer structure is suitable for engaging with the groove formed by the circumferential wall and the upper surface of the midsole lower layer structure, while contacting the upper surface of the carbon plate, the midsole upper layer structure and the midsole lower layer structure tightly sandwich the carbon plate therebetween.

[0016] As a preferred aspect, in the region of the forefoot of the sole, the ratio of the thickness of the midsole upper layer structure to the thickness of the midsole lower layer structure is about 4:1, and in the region of the heel position of the sole, the ratio of the thickness of the midsole upper layer structure to the thickness of the midsole lower layer structure is about 1:5.6.

[0017] Therefore, the shape of the midsole upper layer structure is suitable for engaging with the groove formed by the circumferential wall and the upper surface of the midsole lower layer structure, while contacting the upper surface of the carbon plate, forming a "filling abdomen type structure". The midsole upper layer structure and the midsole lower layer structure sandwich the carbon plate therebetween. The main preparation material of the midsole can be foamed material such as polyurethane (PU), thermoplastic polyurethane (TPU), ethylene-vinyl acetate copolymer (EVA) or thermoplastic polyethylene (TPE).

[0018] The present application also provides a sports shoe, which comprises the sole of the sports shoe described above. When the wearer of the sports shoe moves, the carbon plate has the effect of improving the supporting force, provides higher stability when landing, and the forward pushing force provided by the carbon plate can smoothly transition from the heel to the forefoot, forming a rolling effect to accelerate the step frequency of the athlete and improve the sports performance of the athlete. BRIEF DESCRIPTION OF DRAWINGS

[0019] Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings. In the following description, specific details such as shapes, materials, structures, etc. are provided to give a more thorough understanding of the present application. However, it will be apparent to those skilled in the art that the present application can be implemented without the specific details provided below. In other instances, well-known structures and functions have not been described in detail in order not to unnecessarily obscure the understanding of the present application.

[0020] Figure 1 A side view of an exemplary carbon plate for an athletic shoe according to the present application is shown;

[0021] Figure 2 A top view of an exemplary carbon plate for an athletic shoe according to the present application is shown;

[0022] Figure 3 A side view of an exemplary carbon plate for an athletic shoe according to the present application is shown;

[0023] Figure 4 A side view of an exemplary carbon plate for an athletic shoe according to the present application is shown;

[0024] Figure 5 A side view of an exemplary carbon plate for an athletic shoe according to the present application is shown; Figure 5 is a B-B cross section in Figure 4

[0025] Figure 6 A side view of an exemplary carbon plate for an athletic shoe according to the present application is shown; Figure 6 is a E-E cross section in Figure 4

[0026] BRIEF DESCRIPTION OF DRAWINGS

[0027] 101 - carbon plate; 102 - midsole lower structure; 103 - midsole upper structure; 104 - outsole; 111 - forefoot; 112 - midfoot; 113 - heel; 121 - groove; 122 - peripheral wall; a - first included angle; b - second included angle; c - third included angle; h - drop; D1 - first width; D2 - second width; D3 - third width; D4 - fourth width; x - lateral direction; y - longitudinal direction; z - vertical direction; d - outsole thickness; h1 - height; h2 - height; h3 - height; h4 - height; h5 - height; h6 - height; h7 - height; h8 - height. DETAILED DESCRIPTION

[0028] The present application will be described in further detail by the following non-restrictive examples. It is to be understood that the following examples are included to illustrate various embodiments of the present application and should not be construed to limit the scope of the present application.

[0029] In this document, the term "athletic shoe" can be applied to a wide range of footwear suitable for various daily or athletic occasions, including but not limited to walking shoes, running shoes, casual shoes, tennis shoes, soccer shoes, American football shoes, basketball shoes, cross-training shoes, cleats, golf shoes, etc.​​

[0030] The term "longitudinal" refers to a direction that extends a length of a component. For example, the longitudinal direction of an athletic shoe extends between the forefoot region and the heel region of the athletic shoe. The terms "forward" or "forwardly" are used to refer to the general direction from the heel region toward the forefoot region, and the term "rearward" or "rearwardly" is used to refer to the opposite direction, i.e., from the forefoot region toward the heel region. In some cases, a component can be identified with a longitudinal axis and forward and rearward longitudinal directions along that axis. The longitudinal direction or axis can also be referred to as an anterior-posterior direction or axis.

[0031] The term "lateral" refers to a direction that extends a width of a component. For example, the lateral direction of an athletic shoe extends between the lateral side and the medial side of the athletic shoe. The lateral direction or axis can also be referred to as a lateral direction or axis or a mediolateral direction or axis.

[0032] The terms "vertical" or "vertically" refer to a direction that is generally perpendicular to both the lateral direction and the longitudinal direction. For example, in the case where the sole structure is disposed flat on a ground surface, the vertical direction can extend upward from the ground surface. It will be understood that each of these directional adjectives can be applied to individual components of the sole structure. The term "upward" or "upwardly" refers to a vertical direction pointing toward the top of a component. The term "downward" or "downwardly" refers to a vertical direction opposite the upward direction, pointing toward the bottom of a component, and can generally point toward the bottom of the sole structure of an athletic shoe.

[0033] Also, for consistency and ease of reference, directional adjectives can be used throughout this detailed description corresponding to the illustrated embodiments. One skilled in the art will recognize that terms such as "above," "below," "upward," "downward," "top," "bottom," and the like can be used descriptively to reference relative positions of components, and are not meant to limit the scope of the present invention as defined in the claims. The term "horizontal" refers to a plane extending along the longitudinal direction and the lateral direction and perpendicular to the vertical direction.

[0034] Unless otherwise considered or clearly indicated by context, all numerical values of parameters (e.g., of amounts or conditions) in this specification and claims are to be understood as being modified in all instances by the term "about" or "approximately." None of the parameters in the claims are to be understood as being exact. At the very least, and not as a limitation, the parameters are accurate to within 10%, 9%, 8%, 7%, 6%, 5%, 4%, 3%, 2%, 1%, or 0.5% of the indicated value (or closer to the indicated value if such a value exists), and alternatively to within an industry-accepted standard range or tolerance. The term "about" or "approximately" means that the value in question can vary from a stated value by a minor amount. If the term "about" or "approximately" is not used, the quantity in question can be exact or exact within industry-accepted standards or tolerances.

[0035] Carbon plate

[0036] The following description, in conjunction with the accompanying drawings, will illustrate feasible embodiments of the carbon fiber plate 101 used in the athletic shoes of this invention. Figure 1 As shown, the carbon fiber plate 101 is a thin plate with a certain rigidity. The carbon fiber plate 101 can be sandwiched between the upper midsole structure 103 and the lower midsole structure 102; the sandwiching method will be described in detail below in the description of the sole. The carbon fiber plate 101 can be composed of three parts: the forefoot 111, the midfoot 112, and the heel 113. Specifically, as... Figure 1 As shown, the forefoot 111 of the carbon plate 101 extends from the toes with a certain curvature to the metatarsophalangeal joint and the forefoot, and connects to the midfoot 112. The midfoot 112 extends with a curvature in the arch portion between the forefoot and the heel, and connects to the heel 113. The heel 113 extends a certain length along the longitudinal y-direction in the heel portion. Preferably, the forefoot 111 and the midfoot 112 have an angle of inclination in the lateral x-direction, and / or the heel 113 portion has an angle of inclination in the lateral x-direction.

[0037] This invention, by embedding the aforementioned carbon plate 101 in the midsole of the shoe, enables athletes to obtain greater thrust on their feet through the rolling effect when wearing sports shoes made with this type of sole, thereby increasing stride frequency, improving running speed, and enhancing athletic performance. These aspects will be explained in more detail below regarding the benefits of sports shoes to athletic performance.

[0038] See Figure 1 The diagram shows a general structural schematic of the carbon plate 101 according to the present invention. The carbon plate 101 is a component applied to the sole of a shoe. Its overall shape corresponds to the position of the foot and is roughly divided into three parts: a forefoot part 111, a midfoot part 112, and a heel part 113. These three parts are connected to form a carbon plate 101 with a certain rigidity covering the foot area, and its surface shape is basically consistent with the shape of the sole of the foot. The carbon plate 101 is generally W-shaped, with its front half concave downwards along the longitudinal y-direction, causing the forefoot 111 and the front part of the midfoot 112 of the carbon plate 101 to bend upwards respectively; at the rear part of the midfoot 112, the carbon plate 101 bends downwards again, making the heel 113 of the carbon plate 101 approximately horizontal.

[0039] In a preferred embodiment of the carbon plate 101, the main material used to prepare the carbon plate 101 can be a high-stiffness and high-toughness material such as carbon fiber, glass fiber, or nylon.

[0040] The preparation method of the carbon plate 101 used in some embodiments of the utility model can be: the carbon plate 101 sheet with a thickness of 1-2 mm is cut into small pieces by CNC (Computer Numerical Control), and the preferred embodiment currently adopted is 1.2 mm in thickness, then pre-pressing is carried out by heating, then the carbon plate 101 is put into a mold for secondary preheating and pressurizing, and finally, the carbon plate 101 is trimmed and cleaned to complete the preparation. The rigidity performance test of the carbon plate 101 is specifically: static stiffness test 5mm strain test; the stress of the forefoot part is generally 0.3-0.5kN, the stress of the midfoot part is 0.2-0.3kN, and the stress of the heel part is 0.2-0.3kN.

[0041] In Figure 1 In the embodiment shown, the shape of the carbon plate 101 is similar to a "spoon shape" in that the front part is concave downward and the rear part is generally horizontal or slightly inclined upward as viewed from the side with the ground level as the reference. The forefoot 111 is arcuately extended in the longitudinal direction y, and the curvatures of the toe part and the metatarsal part corresponding thereto can be consistent or slightly different. The toe part of the forefoot 111 of the carbon plate 101 is the front end of the carbon plate 101, and the heel part of the heel 113 is the rear end of the carbon plate 101. In the embodiment shown, the included angle between the tangent line of the forefoot 111 at the metatarsophalangeal joint and the horizontal plane is a first included angle a, which is about 14-24 degrees, preferably 16-20 degrees; the included angle between the tangent line of the midfoot 112 at the arch and the horizontal plane is a second included angle b, which is about 15-25 degrees, preferably 18-22 degrees; and the included angle between the tangent line of the heel 113 at the heel and the tangent line of the midfoot 112 at the arch is a third included angle c, which is about 16-26 degrees, preferably 18-22 degrees. The length of the forefoot 111 of the carbon plate 101 in the longitudinal direction y is about 70-80 mm, preferably 76 mm, the length of the midfoot 112 is about 60-70 mm, preferably 65 mm, and the length of the heel 113 is about 80 mm.

[0042] In the embodiment shown, the difference h between the forefoot 111 and the heel 113 of the carbon plate 101 is about 15-20 mm, preferably 18 mm. As known by those skilled in the art, the term "difference" generally refers to the height difference between the lowest point of the upper surface of the forefoot 111 region and the highest point of the upper surface of the heel 113 region. Due to the large difference between the forefoot 111 and the heel 113, the athlete can provide higher load rate and greater rotational force when running, thereby making it easier for the athlete to increase the step frequency when running. Moreover, the forefoot 111 of the carbon plate 101 has a larger upward curvature than the existing carbon plate 101, which increases the rolling sensation when running in sports shoes, thereby increasing the step frequency of the athlete when running to improve the running speed.

[0043] The bending angle of the forefoot 111 of the carbon plate 101 is largely in line with the forefoot of the foot, so that the amount of deformation of the carbon plate 101 is small when the sports shoe contacts the ground during running, and the impact force on the sports shoe when contacting the ground can be correspondingly reduced. For a runner with high step frequency, the impact force on the ground is smaller than that of a runner with high stride, and the deformation of the metatarsophalangeal joint is also smaller than that of a runner with high stride. Therefore, the athlete with the habit of high step frequency has a more comfortable experience when wearing the sports shoe according to the utility model for running.

[0044] Referring to the carbon plate 101 shown as a top view Figure 2 In an embodiment according to the utility model, the shape of the carbon plate 101 is also configured to gradually widen from the toe to the junction of the forefoot 111 and the midfoot 112 in the top view, and gradually narrow from the midfoot 112 to the heel 113. Specifically, the forefoot 111 part is correspondingly curved and longitudinally extended from the toe part to the metatarsophalangeal joint or the forefoot part, and the projection contour shape corresponds to the projection contour of the forefoot, with the inside corresponding to the big toe side and the outside corresponding to the little toe side. The width is the widest at the metatarsophalangeal joint; the midfoot 112 part is correspondingly curved and longitudinally extended from the metatarsophalangeal joint or the forefoot part to the rear part of the arch, and the width of the carbon plate 101 gradually decreases in this part, and the projection contour corresponds to the projection shape at the arch; the heel 113 is correspondingly extended from the heel part, and the width is basically the same as the arch part and gradually decreases to the heel part. The maximum width D1 of the forefoot 111 of the carbon plate 101 is about 66mm, the width D2 of the middle position of the midfoot 112 is about 43mm, the width D3 of the junction of the midfoot 112 and the heel 113 is about 36mm, and the minimum width D4 of the heel 113 is about 31mm.

[0045] The carbon plate 101 described above is an important component in the sole or sports shoe of the utility model, which will help the sole to realize its functionality as a main component. The carbon plate 101 can provide the main stiffness of the sole and provide the three-dimensional stiffness of the sole, thereby improving the transition of the sole of the athlete wearing the sports shoe according to the utility model during running and improving the running efficiency.

[0046] Sole

[0047] The embodiment of the utility model provides a functional sole of sports shoes, which comprises a midsole, and the carbon plate 101 is clamped in the midsole in a filled abdominal structure. Specifically, the carbon plate 101 is embedded in the midsole of the sports shoes, and the upper structure 103 of the midsole is arranged in the groove 121 of the lower structure 102 of the midsole in a filled abdominal structure, and the upper structure 103 of the midsole is surrounded by the peripheral wall 122 of the lower structure 102 of the midsole for delimiting the groove 121, so that the sole technology for improving the step frequency of athletes and the running speed is improved by the synergistic effect of the carbon plate 101. The carbon plate 101 with rigidity and toughness can adjust the bending stiffness of the sole, so that the transition of running is fast, and the sole of the sports shoes with improved step frequency during running is obtained.

[0048] In the embodiment, the sole of the sports shoes comprises a midsole, a carbon plate 101 and a tread 104, and the three parts are bonded together by an adhesive. Specifically, the sports shoes comprise a tread 104 combined with the midsole near the ground. The tread 104 of the sports shoes is generally hard and has good wear resistance. The pattern on the surface in contact with the ground and the material thereof make the tread 104 have anti-skid property. The main function of the tread 104 is to increase the grip of the sports shoes on the ground, improve the durability of the sports shoes, and also serve as a buffer layer for absorbing part of the impact of the ground. However, the weight of the tread 104 is relatively heavy, so in recent years, the tread is generally only arranged in specific wear areas or integrated in the midsole during the manufacturing process. That is, the tread 104 can be combined with the midsole in a whole piece, or can be divided into two areas, such as the forefoot area and the heel area, and integrated in the midsole. The hardness of the tread 104 can be between 60-70 Shore hardness; the density is preferably ≤1.5 g / cm3; the anti-skid performance: dry sliding friction coefficient ≥0.7; wet sliding friction coefficient ≥0.5.

[0049] Further, the midsole of the sole structure of the sports shoes is located between the tread 104 and the upper, and its main function is to provide cushioning, propulsion feedback and stability for athletes during sports, and reduce the damage to joints such as knees during sports. The impact force generated when the athlete's foot lands will be absorbed and buffered by the midsole, so that the effect of shock absorption can be achieved. The main preparation material of the midsole can be foamed material such as polyurethane (PU), thermoplastic polyurethane (TPU), ethylene-vinyl acetate copolymer (EVA) or thermoplastic polyethylene (TPE).

[0050] Referring to Figure 3Fig. 1 shows a side view of a shoe sole structure according to an embodiment of the present application. Optionally, the shoe sole is shaped like a conventional sports shoe with a higher back and a lower front, and the difference in height between the front and the back is generally between 4-10mm. In the embodiment, the height h1 of the highest point of the toe of the shoe sole from the ground is about 71mm, the height h2 of the highest point of the forefoot of the shoe sole from the ground is about 54mm, the height h3 of the toe of the forefoot of the shoe sole from the ground is about 42.5mm, the height h4 of the lowest point of the upper surface of the forefoot of the shoe sole from the ground is about 34.5mm, the thickness d of the shoe sole is about 1.5mm, the height h5 of the highest point of the arch of the shoe sole from the ground is about 49mm, the height h6 of the lowest point of the heel of the shoe sole from the ground is about 45.5mm, the height h7 of the highest point of the heel of the shoe sole from the ground is about 20mm, and the maximum height h8 of the heel of the shoe sole is about 56.5mm. Those skilled in the art will understand that the above different heights are only given as examples, and the scope of the present application is not limited to the above specific heights.

[0051] Referring to Figure 4 Fig. 2 shows a side view of a cross section of a shoe sole of a sports shoe according to an embodiment of the present application, for explaining the relationship between the components. The thickness of the shoe sole in the middle of the heel is about 33mm, the thickness of the upper structure 103 of the shoe midsole is about 5mm, and the thickness of the carbon plate 101 is about 1.2mm, and the latter two are embedded in the lower structure 102 of the shoe midsole. The thickness of the shoe sole in the forefoot corresponding to the metatarsophalangeal joint is about 27mm, the thickness of the lower structure 102 of the shoe midsole in the forefoot is about 5mm, and the thickness of the carbon plate 101 in the entire midsole is 1.2mm. In the entire shoe sole, the thickest middle section of the shoe sole is designed to be no more than 40mm.

[0052] In the embodiment of the present application, the shoe sole of the sports shoe is composed of multiple components. The carbon plate 101 is the core component of the components of the shoe sole, which, in combination with the upper and lower structures of the shoe midsole, can make the sports shoe have structural advantages, improve the rolling feeling of the athlete during running, and increase the step frequency to increase the running speed. The structure of the carbon plate 101 is described above and will not be repeated here.

[0053] Figure 4 Fig. 3 shows a side view of a cross section of a shoe midsole according to an embodiment of the present application. In the embodiment, the shoe midsole includes an upper structure 103 of the shoe midsole and a lower structure 102 of the shoe midsole. The upper structure 103 of the shoe midsole and the lower structure 102 of the shoe midsole sandwich the carbon plate 101 therebetween to form the main part of the shoe sole, and together achieve the effect of increasing the step frequency of the athlete during running to increase the running speed. In the embodiment, the upper structure 103 of the shoe midsole and the lower structure 102 of the shoe midsole can be made of the same material, or can be made of one of the above different materials or a combination of multiple materials.

[0054] In the shoe midsole, the shoe midsole upper structure 103 is divided into three parts, forefoot, midfoot and heel, as the carbon plate 101 is. The middle area of the upper surface of the shoe midsole lower structure 102 has a groove for bearing the carbon plate 101. Since it needs to be fully engaged with the carbon plate 101 while bearing the carbon plate 101, the shoe midsole lower structure 102 has a similar profile structure as the carbon plate 101. The front half of the shoe midsole lower structure 102, i.e. the forefoot part, is concave, so that the thickness at the forefoot is slightly greater than the thickness at the metatarsophalangeal joint and the forefoot, and the toe of the shoe midsole lower structure 102 is curved upward. The shoe midsole lower structure 102 has the maximum thickness at the heel. At the same time, the shoe midsole lower structure 102 is raised upward around the periphery to form a peripheral wall 122 around the upper surface, so that the shoe midsole upper structure 103 can be accommodated therein and engaged therewith.

[0055] In order to better show the filled abdominal arrangement of the carbon plate 101 between the shoe midsole upper structure 103 and the shoe midsole lower structure 102, in Figure 4 the carbon plate 101 is shown in different cross sections between the shoe midsole upper structure 103 and the shoe midsole lower structure 102 in a variable manner. Specifically,

[0056] Figure 5 A cross-sectional view of the shoe midsole forefoot B-B section of an embodiment of the shoe midsole of the sports shoe according to the present application is shown. From the cross-sectional view, it can be seen that the shoe midsole corresponds to the metatarsophalangeal joint part at the forefoot, and the thickness of the shoe midsole upper structure 103 is greater than that of the shoe midsole lower structure 102. In the embodiment, the thickness of the shoe midsole lower structure 102 is about 5mm, and the thickness of the shoe midsole upper structure 103 is about 20mm. The ratio of the thickness of the shoe midsole upper structure 103 to the thickness of the shoe midsole lower structure 102 at the forefoot of the shoe midsole is about 4:1. In the embodiment, since the heel first contacts the ground when the athlete runs, and then the force is transmitted to the forefoot. The impact force at the forefoot is smaller, so the shoe midsole lower structure 102 is designed to be thinner at this position. But then when the forefoot leaves the ground, the toe end at the metatarsophalangeal joint and the forefoot will be raised upward accordingly, so as to fit the shape of the carbon plate 101 at the forefoot. The thicker shoe midsole upper structure 103 at this position can provide support for the forefoot while giving a comfortable wearing experience to the forefoot.

[0057] In contrast, in Figure 6The cross-sectional view of the E-E section at the heel of the midsole of the embodiment of the midsole of the sports shoe according to the present application is shown in FIG. 6. It can be seen that at the heel position of the midsole, the thickness of the upper layer structure 103 of the midsole is smaller than the thickness of the lower layer structure 102 of the midsole. Specifically, the thickness of the upper layer structure 103 of the midsole is about 5mm, and the thickness of the lower layer structure 102 of the midsole is about 28mm. The ratio of the thickness of the upper layer structure 103 of the midsole to the thickness of the lower layer structure 102 of the midsole at the heel position of the midsole is about 1:5.6. At the heel of the embodiment, the lower layer structure 102 of the midsole is thicker than the upper layer structure 103 of the midsole. The thicker lower layer structure 102 of the midsole provides a cushioning of the impact force for the athlete when the heel contacts the ground during the sports. The upper layer structure 103 of the midsole is thinner so that the heel part can better receive the supporting lifting force of the carbon plate 101.

[0058] In combination with Figure 4 , Figure 5 and Figure 6 , in the midsole structure, the upper layer structure 103 of the midsole is similar to the carbon plate 101 below it in the overall shape in the longitudinal y direction as viewed from the side, and is in the shape of a "scoop". The upper layer structure 103 of the midsole is thinner at the toe, gradually increases in thickness in the longitudinal y direction, reaches the maximum thickness at the metatarsophalangeal joint, and then gradually decreases in thickness from the metatarsophalangeal joint to the arch of the foot, reaches the minimum thickness at the corresponding heel area, and maintains uniform thickness at the heel area. As for the lower layer structure 102 of the midsole, it extends with a small and substantially constant thickness at the forefoot, and gradually increases in thickness from the arch of the foot to the heel area.

[0059] The shape of the shoe midsole upper structure 103 is suitable for engaging with the recess 121 formed by the peripheral wall 122 and the upper surface of the shoe midsole lower structure 102 and the carbon plate 101, that is, the shoe midsole upper structure 103 and the shoe midsole lower structure 102 sandwich the carbon plate 101 therebetween. The upper surface of the shoe midsole upper structure 103 can be directly contacted with the sole of the athlete, and the upper surface is configured to conform to the shape of the sole of the athlete, so that the upper surface of the shoe midsole upper structure 103 is substantially horizontal. Since the carbon plate 101 and the forefoot of the shoe midsole lower structure 102 are concave, the shoe midsole upper structure 103 has a gradually changing thickness at the forefoot, that is, a thinner thickness at the toe, a thicker thickness at the metatarsophalangeal joint and the forefoot, and a thinner thickness at the arch and the heel. Therefore, in the sole structure formed by the shoe midsole upper structure 103, the carbon plate 101 and the shoe midsole lower structure 102, the forefoot portion of the shoe midsole upper structure 103 is thicker, which can provide more deformation space, so that the athlete does not feel uncomfortable due to the deformation of the metatarsophalangeal joint portion during running, and has a more comfortable wearing experience; the heel portion of the shoe midsole lower structure 102 located below the carbon plate 101 has a thicker thickness, which can provide more cushioning during running of the athlete, and reduce joint injuries during exercise; due to the presence of the carbon plate 101, the athlete has a higher supporting force during running, and has higher stability when landing, and the forward pushing force provided by the athlete can smoothly transition from the heel to the forefoot, forming a rolling effect to speed up the athlete's step frequency and improve the athlete's performance.

[0060] In this document, the shoe midsole upper structure 103 and the carbon plate 101 are both embedded in the shoe midsole lower structure 102. In the shoe midsole structure, the structure in which the shoe midsole upper structure 103 and the carbon plate 101 are embedded in the shoe midsole lower structure 102 and surrounded by the peripheral wall 122 of the shoe midsole lower structure 102 can be referred to as a "stomach structure". During exercise, the thicker shoe midsole provides more cushioning during running, thereby reducing the impact force when the sports shoe contacts the ground, and the elasticity of the shoe midsole provides higher take-off for the athlete.

[0061] The utility model also provides a kind of sports shoes, and carbon plate 101 is combined with upper according to above embodiment in its shoe midsole, to form the sports shoes capable of improving athlete's running speed by improving step frequency. The upper can be existing conventional upper, and the form of upper is not limited.

[0062] The performance of the sports shoes was tested. The test results of the finished shoes included: DIN abrasion resistance of 23.8 (Method A), 25.8 (Method B); forefoot energy regression rate of 87.8%, maximum deformation of forefoot of 17.9 mm, dynamic coefficient of friction of forefoot of 1.05 (dry, ceramic tile interface), 0.36 (wet, ceramic tile interface); heel energy regression rate of 84.9%, maximum deformation of heel of 28.8 mm, dynamic coefficient of friction of heel of 1.03 (dry, ceramic tile interface), 0.34 (wet, ceramic tile interface); bending moment of sports shoes of 3.8 N·m; torsional performance of sports shoes of 2.6 N·m.

[0063] Contrast experiment verification

[0064] The utility model discloses through experiment, compare the embodiment of sports shoes according to the utility model with the market existing sports shoes, through the analysis different sports shoes under different matching speed's propulsion performance, ejection performance, running economy and gait parameter, can see from the test result, according to the test shoes 1 and test shoes 2 described in the foregoing of the utility model have more excellent propulsion performance and ejection performance, running economy is in the upstream level among the tested sports shoes, and gait parameter shows the characteristics of high step frequency and low step length. Thus, the sports shoes described in the utility model can provide stronger propulsion, and are more suitable for the athletes who improve the step frequency to improve the running speed, to enhance the sports performance of the athletes.

[0065] 1. Test shoes

[0066] Name the sports shoes of this test as: test shoes 1 and test shoes 2, and the secondary test sports shoes as test shoes 3; the control sports shoes as control shoes 1, control shoes 2, control shoes 3, control shoes 4, control shoes 5, control shoes 6 and control shoes 7.

[0067] 2. Test content

[0068] 2.1. Propulsion performance and ejection performance

[0069] VICON motion capture system, Kistler force platform and photoelectric gate are used to collect the kinematics, ground reaction force (GRF), running speed (km / h) and other data of the subjects under the condition of barefoot and wearing each kind of sports shoes (sequence random) when running at four different matching speeds (12±0.5km / h, 14±0.5km / h, 16±0.5km / h, 18±0.5km / h) at a constant speed, and the touch ground time (s) and vertical, sagittal axis ground reaction force integral (N·s) are calculated based on the GRF data.

[0070] 2.2. Running economy and gait parameters

[0071] Based on an indoor high-speed treadmill, the COSMED K5 gas metabolism analyzer was used to collect and analyze the oxygen intake of the test subjects during the running process, while the Polar heart rate belt was used to monitor the heart rate changes of the runners in real time. Test procedure: (1) The test subjects warmed up for 10 minutes at a self-selected running speed on the plantar pressure test treadmill; (2) rested for 5 minutes; (3) the test was conducted at four different speeds (12±0.5km / h, 14±0.5km / h, 16±0.5km / h, 18±0.5km / h), each test lasted for 4 minutes, and the rest between sets was 2 minutes; (4) the mean relative oxygen consumption per kilometer (VO2) was measured in the last minute of each set (relative oxygen consumption per kilometer is defined as oxygen consumption per kilometer per kilogram of body weight, unit: mLO2∙kg). -1 ∙km -1 While measuring oxygen consumption, a plantar pressure test treadmill was also used.

[0072] 3. Test Results

[0073] 3.1 Propulsion Performance

[0074] For the same runner wearing the same pair of running shoes, their running speed and ground contact time are linearly related. Therefore, linear regression can be used to fit the equations of running speed and ground contact time when wearing different running shoes. By comparing the ground contact times of different running shoes at the same speed, the propulsion performance of the running shoes can be reflected. That is, at the same speed, the shorter the ground contact time, the higher the output power and the better the propulsion performance of the running shoes.

[0075] The test results are shown in Table 1.

[0076] At a pace of 12 km / h, the average ground contact time of test shoe 2 was lower than that of the other shoes, and there was a significant difference compared with control shoe 6, control shoe 5 and control shoe 2; the average ground contact time of test shoe 1 was lower than that of all other shoes except for test shoe 2 and control shoe 7, and there was a significant difference compared with control shoe 6 and control shoe 5.

[0077] At paces of 14km / h, 16km / h, and 18km / h, there were no significant differences in ground contact time among the different shoes.

[0078] Table 1 Summary of contact times

[0079]

[0080] 3.2 Ejection Performance

[0081] Previous studies have shown that, when wearing shoes, the movement of the metatarsophalangeal joint during running is mainly affected by the elastic deformation of the midsole material. The impact of footwear on the launch performance of athletic shoes is mainly reflected in increasing the work done by the metatarsophalangeal joint. Therefore, the difference between the work done by the metatarsophalangeal joint during the support phase of running while wearing athletic shoes and when barefoot (without the addition of footwear) can be used to reflect the assistance provided by athletic shoes during the push-off phase of running.

[0082] The results of the difference calculation are shown in Table 2.

[0083] At a pace of 12 km / h, the difference in work done by the metatarsophalangeal joint of test shoe 2 was significantly higher than that of the other shoes, but significantly lower than that of control shoe 7, and not significantly different from that of control shoe 1; the difference in work done by the metatarsophalangeal joint of test shoe 1 was significantly lower than that of test shoe 2 and control shoe 7, and not significantly different from that of other footwear.

[0084] At a pace of 14 km / h, the difference in work done by the metatarsophalangeal joint of test shoe 2 was significantly higher than that of test shoe 1, control shoe 3, test shoe 3, control shoe 5, and control shoe 6, and significantly lower than that of control shoe 7. There was no significant difference between test shoe 7 and control shoe 2 and control shoe 1. The difference in work done by the metatarsophalangeal joint of test shoe 1 was significantly lower than that of test shoe 2, control shoe 1, and control shoe 7, and significantly higher than that of test shoe 3.

[0085] At a pace of 16 km / h, the difference in work done by the metatarsophalangeal joint in test shoe 2 was significantly higher than that in control shoe 2, test shoe 3, control shoe 5, and control shoe 6, but there was no significant difference compared with other shoes.

[0086] At a pace of 18 km / h, the average difference in work done by the two metatarsophalangeal joints of the test shoes was relatively high, but there was no significant difference between them and other shoes.

[0087] Table 2 Summary of the work difference between the metatarsophalangeal joints

[0088]

[0089] 3.3 Running Economy

[0090] This test uses the average relative oxygen consumption (VO2) per minute for the last minute of each test group (relative oxygen consumption per minute is defined as oxygen consumption per kilogram of body weight, unit: mLO2∙kg). -1 To quantify the economics of running.

[0091] The test results are shown in Table 3. Test shoe 2 performed better in terms of running economy at a pace of 18km / h, while test shoe 3 performed better at a pace of 16km / h.

[0092] Table 3 Summary of Relative Oxygen Consumption Per Minute

[0093]

[0094] 3.4 Gait Parameters

[0095] According to the gait parameter summary table in Table 4, compared with the control shoes, the runners wearing test shoes 1 and 2 exhibited high cadence and low stride length. It is speculated that these shoes are more suitable for runners who tend to increase their running speed by increasing cadence.

[0096] Table 4 Summary of Gait Parameters

[0097]

[0098] 4. Summary

[0099] 4.1 Propulsion Performance

[0100] At a pace of 12 km / h, both test shoes 2 and 1 showed strong propulsion performance; at paces of 14 km / h, 16 km / h, and 18 km / h, there was no significant difference in propulsion performance between them and the control shoe.

[0101] 4.2 Launch performance

[0102] Overall, shoe 2 performed excellently across all four pace ranges, exhibiting stronger launch performance compared to the control shoe at paces of 16km / h and 18km / h; shoe 1 performed well in launch performance across all pace ranges.

[0103] 4.3 Running Economy

[0104] The running economy of the test shoe 2 was better at a pace of 18km / h, while the running economy of the test shoe 3 was better at a pace of 16km / h. The running economy of the test shoe 1 was average across all pace ranges.

[0105] 4.4 Gait Parameters

[0106] Compared to the control shoes, runners wearing test shoes 1 and 2 exhibited high cadence and low stride length, suggesting that these shoes are more suitable for runners who prefer to increase their running speed by increasing cadence.

[0107] The test results show that, compared with the control group, both test shoes 2 and 1 have lower ground contact time and greater metatarsophalangeal joint work difference, resulting in superior propulsion and launch performance. In terms of running economy, test shoes 2 and 1 are generally at an upper level compared to the control group, with test shoe 2 showing better running economy at a pace of 18 km / h. Regarding gait parameters, test shoes 2 and 1 exhibit high cadence and low stride compared to the control group. Therefore, considering the above test results and the characteristics of the shoes, this invention is more suitable for athletes who want to increase their running speed by increasing cadence.

[0108] The embodiments of this utility model have been illustrated and described herein, but those skilled in the art should understand that various modifications, omissions, and additions can be made without departing from the spirit and scope of this utility model. It should not be understood as limited to the specific embodiments described herein, but encompasses all possible embodiments embodied within the scope and equivalents of the features described in the appended claims.

[0109] The dimensions and values ​​disclosed herein should not be construed as strictly limited to the precise numerical values ​​stated. Rather, unless otherwise specified, each such dimension is intended to represent the value and a functionally equivalent range around that value. For example, a dimension disclosed as “40 mm” is intended to represent “approximately 40 mm”.

[0110] All documents referenced in the “Detailed Description” section are incorporated herein by reference in the relevant sections; no reference to any document should be construed as an admission that it is prior art concerning this utility model. In the event of any conflict between the meaning or definition of any term in this written document and the meaning or definition of any term in the referenced documents, the meaning or definition assigned to the term in this written document shall prevail.

[0111] While specific embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that many other changes and modifications can be made without departing from the spirit and scope of the present invention. Therefore, the appended claims are intended to cover all such changes and modifications within the scope of the present invention.

[0112] When describing elements of the present invention or their preferred embodiments(s), the articles "a," "an," "the," and "the" are intended to indicate the presence of at least one element. The terms "comprising," "including," and "having" are intended to be inclusive and mean that additional elements may be present in addition to the listed elements. Many modifications and variations may be made to the present invention without departing from the spirit and scope thereof. Therefore, the above embodiments are not intended to limit the scope of the present invention.

Claims

1. A carbon fiber plate for a shoe sole, comprising at least three parts: forefoot, midfoot, and heel, wherein: The forefoot extends longitudinally from the corresponding toe with a certain curvature to the corresponding metatarsophalangeal joint; The midrib extends longitudinally with a certain curvature from the metatarsophalangeal joint to the posterior end of the corresponding arch; and The heel extends from the rear end of the arch to the rear end of the corresponding heel; The feature is that, when viewed from the side along the longitudinal direction, the forefoot, midsection, and heel are respectively inclined at a first angle, a second angle, and a third angle relative to the horizontal plane, wherein the first angle to the third angle are designed so that the carbon plate is generally W-shaped when viewed from the side.

2. The carbon plate according to claim 1, characterized in that, When viewed from above in a horizontal direction, the carbon plate has the following characteristics along the longitudinal direction: Starting from the toes, the width gradually increases laterally until the first width is located at the junction of the forefoot and midsection; The second width located in the middle of the waist; The third width is located at the junction of the mid-waist and the heel; as well as The fourth width located inside the heel; The widths from the first to the fourth are gradually decreasing.

3. The carbon plate according to claim 2, wherein, The shape of the carbon plate is designed such that, when viewed from the side along the longitudinal direction: The angle between the tangent of the forefoot at the metatarsophalangeal joint and the first angle with the horizontal plane is designed to be 14 to 24 degrees; The second angle between the tangent of the mid-waist at the arch and the horizontal plane is 15 to 25 degrees; and the third angle between the tangent of the heel at the heel and the tangent of the mid-waist curve at the arch is 16 to 26 degrees.

4. The carbon plate according to claim 3, characterized in that, The first width is in the range of 60 to 70 mm, the second width is in the range of 40 to 45 mm, the third width is in the range of 35 to 40 mm, and the fourth width is in the range of 30 to 35 mm.

5. The carbon plate according to claim 3, characterized in that, There is a drop of 15 to 20 millimeters between the forefoot and the heel.

6. The carbon plate according to claim 3, characterized in that, When viewed from the side in the longitudinal direction, the forefoot has a length of approximately 70 to 80 millimeters, the midsection has a length of approximately 60 to 70 millimeters, and the heel has a length of approximately 80 millimeters.

7. A shoe sole for athletic shoes, comprising a midsole, said midsole including an upper midsole structure above the sole and a lower midsole structure below the sole, characterized in that, A carbon plate as described in any one of claims 1-6 is sandwiched between the upper midsole structure and the lower midsole structure.

8. The sole according to claim 7, characterized in that, in, The shoe midsole substructure has a groove for supporting and engaging with the carbon plate, wherein the groove is designed to be defined by the shoe midsole substructure protruding upward along its circumference and forming a peripheral wall around the upper surface. as well as The upper structure of the shoe midsole is shaped to engage with the groove formed by the periphery and upper surface of the lower structure of the shoe midsole, while contacting the upper surface of the carbon plate. The upper structure of the shoe midsole and the lower structure of the shoe midsole tightly sandwich the carbon plate between them.

9. The sole according to claim 8, characterized in that, In the forefoot region of the sole, the ratio of the thickness of the upper midsole structure to the thickness of the lower midsole structure is approximately 4:1, and in the heel region of the sole, the ratio of the thickness of the upper midsole structure to the thickness of the lower midsole structure is approximately 1:5.

6.

10. A type of athletic shoe, characterized in that, The sole of the athletic shoe included in any one of claims 7-9.

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