A sole and shoe

Abstract

The application relates to the field of shoes, in particular to a shoe sole and a shoe. The shoe sole is characterized in that a plurality of first protrusions and a plurality of second protrusions for gripping the ground are arranged on the forefoot part of the shoe sole, the first protrusions are in a herringbone shape and are provided with forward openings, the second protrusions are in a herringbone shape and are provided with backward openings, at least part of the first protrusions and part of the second protrusions are staggered and arranged in the medial-lateral direction, and the size of the second protrusions in the front-back direction is greater than the size of the adjacent first protrusions in the front-back direction.

Description

Technical Field

[0001] This application relates to the field of footwear, specifically to a sole and a shoe. Background Technology

[0002] With societal development, people are paying increasing attention to children's sports. Sprinting is a crucial sport for children, and several indicators related to sprinting are included in the National Student Physical Fitness and Health Standards. Sprinting is a highly explosive sport; with each foot strike and takeoff, the sole and upper of the shoe bear significant action and reaction forces from the foot and the ground. Insufficient grip can lead to slippage, affecting running speed and increasing the risk of falls. Therefore, there is an urgent need for shoes that can improve children's sprinting speed while reducing the risk of injury during exercise. Utility Model Content

[0003] The purpose of this application is to overcome the aforementioned defects or problems in the prior art and to provide a sole and shoe that improves sprint grip.

[0004] To achieve the above objectives, the following technical solution is adopted:

[0005] A shoe sole, wherein the forefoot portion of the sole is provided with a plurality of first protrusions and a plurality of second protrusions for gripping the ground, the first protrusions being herringbone in shape and having a forward opening, the second protrusions being herringbone in shape and having a rearward opening, at least some of the first protrusions and some of the second protrusions being alternately spaced along the inner and outer directions, and the dimension of the second protrusion along the front-back direction being larger than the dimension of the adjacent first protrusion along the front-back direction.

[0006] Furthermore, the first protrusion is arranged in the front-back direction, and the second protrusion is arranged in the front-back direction.

[0007] Furthermore, the inner and outer edges of the forefoot portion of the sole are provided with a plurality of third and fourth protrusions for gripping the ground. The third protrusions are herringbone shaped and have an opening for the edge of the forefoot portion, and the fourth protrusions are herringbone shaped and have an opening for the middle of the forefoot portion. At least some of the third protrusions and some of the fourth protrusions are arranged alternately in the front-back direction.

[0008] Furthermore, the dimension of the third protrusion along the inner and outer directions is larger than the dimension of the adjacent fourth protrusion along the inner and outer directions.

[0009] Furthermore, the first, second, third, and fourth protrusions are made of KPU material.

[0010] Furthermore, the sole includes a midsole and a support member. The midsole is made of supercritical foam material. The support member has an outer edge, a first support, a second support, and a through hole. The projections of the inner and outer sides of the outer edge overlap with the projections of the first metatarsophalangeal joint, the fourth and fifth metatarsophalangeal joints, respectively. The projection of the first support overlaps with the projection of the second distal phalanx extending through the second and third metatarsophalangeal joints to the arch of the foot. The projection of the second support overlaps with the projection of the first proximal phalanx extending to the third middle phalanx. The projection of the through hole overlaps with the projections between the first and second metatarsophalangeal joints and between the third and fourth metatarsophalangeal joints.

[0011] Furthermore, the forefoot portion of the sole is 19mm thick, the heel portion is 25mm thick, and the heel-to-toe difference is 6mm.

[0012] A shoe includes an upper, an insole, and a sole as described in any one of the preceding descriptions.

[0013] Furthermore, the insole is made of supercritical foam material, and the front of the insole has several through holes.

[0014] Compared with existing technologies, the above solution has the following beneficial effects:

[0015] The first technical solution involves a plurality of first and second protrusions on the forefoot of the sole for gripping the ground. The first protrusions are herringbone-shaped with forward-facing openings, while the second protrusions are herringbone-shaped with rearward-facing openings. The first and second protrusions are arranged alternately along the inner and outer sides. Located on the forefoot of the sole, these protrusions enhance the sole's friction. During sprinting, as the sole initially contacts the ground, the forefoot presses down, and the openings of the first protrusions face forward. During this downward pressure, the openings of the first protrusions interlock with the ground, restricting forward movement of the sole and increasing grip, thus improving stability during running. After the sole contacts the ground, the foot pushes backward, and the ground's reaction force propels the body forward. The rearward-facing openings of the second protrusions, combined with the foot's backward-pushing motion, further enhance grip as the foot's openings interlock with the ground. To prevent excessive slippage between the sole and the ground during the backward thrust of the foot, which would waste energy and reduce forward kinetic energy, thus affecting sprint speed, the design also prevents slippage that could lead to loss of balance and falls. The opening of the second protrusion ensures full contact with the ground, forming a solid and stable propulsion surface when the foot pushes backward. When the foot exerts force on the ground, the reaction force from the ground on the sole is better utilized through the propulsion surface formed by the opening of the second protrusion, increasing running speed. The staggered arrangement of parts of the first and second protrusions along the inner and outer sides ensures that within the same area of ​​the forefoot, both the forward-facing first protrusion enhances grip, and the backward-facing second protrusion further improves grip and propulsion. When there is standing water on the ground, the interval between the first and second protrusions creates a channel for water flow, preventing water from accumulating between the sole and the ground and improving traction.

[0016] The second protrusion has a larger front-to-back dimension than the adjacent first protrusion. During the contact between the sole and the ground, the surfaces of the first and second protrusions generate friction with the ground. The openings of the first and second protrusions interlock with the ground, creating resistance and working together to improve grip. In sprinting, from the moment the sole contacts the ground until it leaves the ground, the force exerted by the foot to lift the sole off the ground is greater than the force exerted by the sole upon landing. Given the limited area of ​​the forefoot, the second protrusion needs to provide better grip than the first protrusion. The larger front-to-back dimension of the second protrusion, along with its larger opening, provides better grip and propulsion when the sole leaves the ground.

[0017] The second technical solution involves the first and second protrusions being arranged alternately along the inner and outer sides, and also along the front-to-back direction. Several rows of first and second protrusions are arranged along the inner and outer sides on the forefoot from front to back. During sprinting, the part of the sole in contact with the ground changes each time it lands. The arrangement of the first and second protrusions along the front-to-back direction, and their alternating arrangement along the inner and outer sides, ensures that regardless of which part of the sole contacts the ground, the contact area has both a forward-opening first protrusion to improve grip and prevent slippage upon landing, and a rearward-opening second protrusion to further enhance grip and propulsion. This solution improves the stability of the sole and increases running speed.

[0018] The third technical solution involves a third and fourth protrusion on the inner and outer edges of the forefoot of the sole for gripping the ground. The third protrusion is herringbone-shaped with an opening towards the edge of the forefoot, while the fourth protrusion is herringbone-shaped with an opening towards the center of the forefoot. During changes of direction and sprints, the foot drives the sole to move in an inward and outward direction, with the sole contacting the ground in this direction. The opening of the third protrusion faces the edge of the forefoot. When the sole contacts the ground in this inward and outward direction, the opening of the third protrusion interlocks with the ground, improving grip, better resisting lateral inertia, and increasing speed during changes of direction or sprints. During changes of direction and sprints, the sole experiences multi-directional forces, and the opening of the fourth protrusion faces inward to prevent excessive inward movement. The third and fourth protrusions are arranged alternately in the forefoot direction. When any part of the outer edge of the sole moves in an inward and outward direction with the ground, both the third and fourth protrusions work together to improve the sole's grip and stability. When there is water on the ground, the gap between the third and fourth bumps forms a channel for water to flow, preventing water from remaining between the sole of the shoe and the ground, thus improving grip.

[0019] The fourth technical solution involves a third protrusion whose dimension along the inner and outer sides is larger than that of the adjacent fourth protrusion along the inner and outer sides. During changes of direction or zigzag runs, when the sole first contacts the ground, the opening of the third protrusion interlocks with the ground to resist inertia; when the foot exerts force to lift the sole off the ground, the opening of the third protrusion interlocks with the ground, improving grip and propulsion. The opening of the third protrusion withstands a greater force than the opening of the fourth protrusion. Given the limited edge area of ​​the upper, setting the dimension of the third protrusion along the inner and outer sides to be larger than that of the adjacent fourth protrusion along the inner and outer sides provides better grip and propulsion during changes of direction and zigzag runs.

[0020] The fifth technical solution involves using KPU material for the first, second, third, and fourth protrusions. KPU material offers high wear resistance and slip resistance, improving the grip of the sole. Furthermore, KPU material is flexible, allowing it to better embed itself into minor unevenness in the ground, enhancing both grip and propulsion.

[0021] The sixth technical solution involves using a supercritical foam material for the midsole. Supercritical foam material possesses high resilience, improving running speed and comfort during running. The support component includes an outer edge, a first support portion, a second support portion, and through holes. The projections of the inner and outer sides of the outer edge overlap with the projections of the first metatarsophalangeal joint, the fourth, and the fifth metatarsophalangeal joints, respectively. The projection of the first support portion overlaps with the projection of the second distal phalanx extending through the second and third metatarsophalangeal joints to the arch. The projection of the second support portion overlaps with the projection of the first proximal phalanx extending to the second proximal phalanx and then to the third medial phalanx. The projection of the through holes overlaps with the projections between the first and second metatarsophalangeal joints and between the third and fourth metatarsophalangeal joints. This support component improves the flexural stiffness of the sole, increasing running speed, while the through holes at locations corresponding to some metatarsophalangeal joints prevent excessive flexural stiffness, making it suitable for children.

[0022] The seventh technical solution features a 19mm forefoot thickness, a 25mm heel thickness, and a 6mm heel-to-toe drop. Existing children's running shoes have thicker soles. This solution's thinner sole lowers the center of gravity of both the shoe and the runner. Children have weaker balance; a lower center of gravity helps maintain balance, increasing running speed and reducing the risk of injury from imbalance. An excessively low heel-to-toe drop leads to insufficient cushioning upon foot strike, causing excessive pressure and injury; conversely, an excessively high drop can overstretch foot muscles, hindering foot development. A 6mm heel-to-toe drop meets the needs of children's development while also improving running speed.

[0023] The eighth technical solution is a shoe comprising an upper, an insole, and a sole as described in any one of the above-mentioned components. This shoe, using the aforementioned sole, improves grip and propulsion, as well as braking and propulsion during changes of direction and sprints. Furthermore, while aiming to increase children's running speed, it also fully considers that children's bodies are still developing, lowering the center of gravity and selecting a heel-to-toe drop suitable for children.

[0024] The ninth technical solution involves using a supercritical foam material for the insole, with several through-holes at the front. Supercritical foam material offers high resilience, improving running speed and comfort. The small holes in the forefoot area further reduce the shoe's weight and enhance the insole's moisture-wicking and breathability. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments, the accompanying drawings used are briefly described below:

[0026] Figure 1 This is a bottom view of the shoe sole in Example 1;

[0027] Figure 2 This is a bottom view of the shoe sole in Example 2;

[0028] Figure 3 This is a schematic diagram of the support component.

[0029] Key reference numerals: forefoot portion 1; first protrusion 11; second protrusion 12; third protrusion 13; fourth protrusion 14; support member 20; outer edge portion 21; first support portion 22; second support portion 23; through hole 24. Detailed Implementation

[0030] Unless otherwise specified, the terms “first,” “second,” or “third,” etc., in the claims and description are used to distinguish different objects and not to describe a particular order.

[0031] Unless otherwise specified, in the claims and description, the terms “center,” “lateral,” “longitudinal,” “horizontal,” “vertical,” “top,” “bottom,” “inner,” “outer,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “clockwise,” “counterclockwise,” etc., indicate the orientation or positional relationship based on the orientation and positional relationship shown in the drawings, and are only for the purpose of simplifying the description, and do not imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation.

[0032] Unless otherwise specified in the claims and description, the terms "fixed connection" or "fixed connection" shall be interpreted broadly to mean any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection, and fixed connection by other means or components.

[0033] Unless otherwise specified, the terms “comprising,” “having,” and variations thereof in the claims and description shall mean “including but not limited to.”

[0034] In the claims and description, unless otherwise specified, the term "have" means that a technical feature that follows is part of a technical feature that precedes it.

[0035] The technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings.

[0036] Example 1

[0037] A shoe includes an upper, an insole, and a sole. The insole is made of supercritical foam material and has perforations at the front. Supercritical foam material has high resilience, improving running speed and comfort during running. Small perforations in the forefoot area of ​​the insole further reduce the shoe's weight and improve its moisture-wicking and breathability.

[0038] See Figure 1 , Figure 1 A bottom view of the sole is shown. The forefoot portion 1 of the sole includes a first protrusion 11 and a second protrusion 12 for traction. The first protrusion 11 is herringbone-shaped and has a forward opening, while the second protrusion 12 is herringbone-shaped and has a rearward opening. The first protrusion 11 and the second protrusion 12 are staggered along the inner and outer sides. The dimension of an adjacent second protrusion 12 in the front-back direction is larger than the dimension of the first protrusion 11 in the front-back direction.

[0039] The forefoot portion 1 of the sole includes a first protrusion 11 and a second protrusion 12 for gripping the ground. The bottom view of the sole is a view of the sole along the ground to the foot. The first protrusion 11 and the second protrusion 12 protrude from the bottom of the forefoot portion 1. In this embodiment, the first protrusion 11 and the second protrusion 12 are made of KPU material. KPU material has high wear resistance and anti-slip properties. When running, the first protrusion 11 and the second protrusion 12 contact the ground to improve the grip of the sole.

[0040] The first protrusion 11 is herringbone-shaped with a forward opening, and the second protrusion 12 is herringbone-shaped with a rearward opening. In this embodiment, the direction from the forefoot portion 1 to the heel is the front-to-back direction, that is, the direction of the forefoot portion 1 is the forward direction, and the direction of the heel portion is the rearward direction. The first protrusion 11 is herringbone-shaped with a forward opening, and the second protrusion 12 is herringbone-shaped with a rearward opening. In addition to improving grip through friction between their surfaces and the ground, the first protrusion 11 and the second protrusion 12 also improve grip through their openings. During sprinting, when the sole just contacts the ground, the forefoot portion 1 presses down, and the opening of the first protrusion 11 faces forward. During the pressing down of the forefoot portion 1, the opening of the first protrusion 11 interlocks with the ground, restricting the forward movement of the sole. When the sole lands, the friction between the surfaces of the first protrusion 11 and the second protrusion 12 and the ground, along with the resistance created by the interlocking of the opening of the first protrusion 11 with the ground, work together to improve the sole's grip, making the body more stable during running. After the sole contacts the ground, the foot pushes backward, and the ground's reaction force propels the body forward. The opening of the second protrusion 12 faces backward; when the foot pushes backward, the sole tends to move backward, and the interlocking of the opening of the second protrusion 12 with the ground further enhances the sole's grip. This prevents excessive sliding between the sole and the ground during the backward push, which would waste energy, reduce forward kinetic energy, and affect sprint speed. It also prevents slippage, which could lead to loss of balance and falls. The full contact between the opening of the second protrusion 12 and the ground creates a solid and stable propulsive surface when the foot pushes backward. When the foot applies force to the ground, the reaction force of the ground on the sole of the shoe is better applied to the sole of the shoe according to the propulsion surface formed by the opening of the second protrusion 12, thereby increasing the running speed.

[0041] The first protrusion 11 and the second protrusion 12 are arranged alternately along the inner and outer directions. In this embodiment, the sole corresponding to the thumb is the inner side, and the sole corresponding to the little finger is the outer side. The inner and outer directions are the extension direction from the thumb to the little finger. The first protrusion 11 and the second protrusion 12 are arranged alternately along the extension direction from the thumb to the little finger. In this embodiment, the first protrusion 11 and the second protrusion 12 are arranged in a cyclical alternation along the inner and outer directions from the thumb to the little finger. That is, the first protrusion 11 and the second protrusion 12 are arranged adjacent to each other in the inner and outer directions. When the forefoot 1 contacts the ground at any position in the inner and outer directions, the first protrusion 11 and the second protrusion 12 will work together to improve the grip. The first protrusion 11 and the second protrusion 12 are arranged at intervals. When there is water on the ground, the interval between the first protrusion 11 and the second protrusion 12 forms a channel for the water to flow on the ground, preventing the water on the ground from being located between the ground and the sole of the shoe, thus reducing the friction between the ground and the sole of the shoe and reducing the grip.

[0042] The adjacent second protrusion 12 has a larger front-to-back dimension than the first protrusion 11. During sprinting, from the moment the sole contacts the ground until it leaves the ground, the force exerted by the foot to lift the sole off the ground is greater than the force exerted by the sole upon landing. Given the limited area of ​​the forefoot 1, the second protrusion 12 needs to provide better grip than the first protrusion 11. The second protrusion 12 has a larger front-to-back dimension than the adjacent first protrusion 11, and its opening is also larger, providing better grip and propulsion when the sole leaves the ground.

[0043] The first protrusion 11 and the second protrusion 12 on the forefoot portion 1 of the sole are arranged in a front-to-back direction. During sprinting, the part of the sole that contacts the ground with each landing is different. The first protrusion 11 and the second protrusion 12 are arranged in a front-to-back direction and are staggered along the inner and outer sides. Regardless of which part of the sole contacts the ground, the contact point has both the first protrusion 11 opening forward to improve grip and prevent slippage upon landing, and the second protrusion 12 opening backward to improve grip and propulsion. This design improves the stability of the sole and increases running speed. Moreover, the first protrusion 11 and the second protrusion 12 are numerous and small, which can more effectively distribute pressure than the fewer and longer studs in existing technologies, and also increases the contact points between the sole and the ground to improve grip and propulsion.

[0044] The sole is made of supercritical foam material, which has high rebound performance, improving running speed and comfort during running. Supercritical foaming uses supercritical fluid, obtained by treating gases such as carbon dioxide and nitrogen under high temperature and pressure, as a foaming agent. The sole obtained by supercritical foaming is lightweight and has good rebound and cushioning performance. The sole includes a support member 20, which has an outer edge 21, a first support part 22, a second support part 23, and a through hole 24. The projections of the inner and outer sides of the outer edge 21 overlap with the projections of the first metatarsophalangeal joint, the fourth and fifth metatarsophalangeal joints, respectively. The projection of the first support part 22 overlaps with the projection of the second distal phalanx through the second and third metatarsophalangeal joints to the arch. The projection of the second support part 23 overlaps with the projection of the first proximal phalanx extending to the third middle phalanx. The projection of the through hole 24 overlaps with the projections between the first and second metatarsophalangeal joints and between the third and fourth metatarsophalangeal joints. The support component 20 increases the bending stiffness of the sole and improves running speed, while also providing through holes at the position corresponding to the metatarsophalangeal joint to reduce its bending stiffness and make it suitable for children.

[0045] The forefoot thickness of the sole is 19mm, the heel thickness is 25mm, and the heel-to-toe drop is 6mm. Existing children's running shoes have relatively thick soles; this embodiment lowers the center of gravity of the sole, and consequently, the body's center of gravity. Children have weaker balance abilities; lowering the center of gravity helps maintain balance better, increasing running speed and reducing the risk of injury due to imbalance. An excessively low heel-to-toe drop can lead to insufficient cushioning upon foot landing, causing excessive pressure and injury; conversely, an excessively high heel-to-toe drop can cause overstretching of the foot muscles, affecting foot development. A heel-to-toe drop of 6mm meets the needs of children's development while also improving running speed.

[0046] Example 2

[0047] The difference between Example 2 and Example 1 lies in the following aspects.

[0048] See Figure 2 ,like Figure 2As shown, the inner and outer edges of the forefoot portion 1 of the sole are provided with several third protrusions 13 and fourth protrusions 14 for gripping the ground. In this embodiment, the thumb corresponds to the inner side of the forefoot portion 1, and the inner edge of the forefoot portion 1 extends in the front-back direction. The little finger corresponds to the outer side of the forefoot portion 1, and the outer edge of the forefoot portion 1 extends in the front-back direction. In this embodiment, the inner and outer edges of the forefoot portion 1 are respectively provided with a row of staggered third protrusions 13 and fourth protrusions 14. In other embodiments, multiple rows of staggered third protrusions 13 and fourth protrusions 14 may also be provided. The third protrusion 13 is herringbone-shaped and has an opening towards the edge of the forefoot portion 1, and the fourth protrusion 14 is herringbone-shaped and has an opening towards the middle of the forefoot portion 1. During changes of direction and shuttle runs, the sole of the shoe contacts the ground in the inner and outer directions, and the reaction force of the ground changes the direction of the person's movement. When the sole moves in the inward and outward direction, the surfaces of the third protrusion 13 and the fourth protrusion 14 rub against the ground to resist inertia. Simultaneously, the opening of the third protrusion 13 interlocks with the ground, providing resistance in the early stages of a change of direction to prevent relative movement between the sole and the ground, and providing a propulsive surface in the later stages of the change of direction to increase the speed at which the sole separates from the ground. During a change of direction, the forces experienced are multidirectional; the opening of the fourth protrusion 14 faces inward to prevent excessive inward movement. Some of the third protrusions 13 and some of the fourth protrusions 14 are staggered along the front-to-back direction. When any part of the outer edge of the sole moves in the inward and outward direction with the ground, the third protrusions 13 and the fourth protrusions 14 work together to improve the grip and stability of the sole. The staggered arrangement of the third protrusions 13 and the fourth protrusions 14 creates channels for water flow when there is standing water on the ground, preventing water from reducing friction between the ground and the sole and thus reducing grip.

[0049] The dimension of the third protrusion 13 along the inner and outer directions is larger than that of the adjacent fourth protrusion 14 along the inner and outer directions. During changes of direction or shuttle runs, when the sole just contacts the ground, the opening of the third protrusion 13 interlocks with the ground to resist inertia; when the foot exerts force to lift the sole off the ground, the opening of the third protrusion 13 interlocks with the ground to improve grip and propulsion. The force borne by the opening of the third protrusion 13 is greater than that of the opening of the fourth protrusion 14. Given the limited edge area of ​​the upper, setting the dimension of the third protrusion 13 along the inner and outer directions to be larger than that of the adjacent fourth protrusion 14 along the inner and outer directions provides just the right amount of grip and propulsion during changes of direction and shuttle runs.

[0050] This application discloses a shoe sole in which a plurality of first protrusions 11 and second protrusions 12 are arranged alternately along the inner and outer directions on the forefoot portion 1 of the sole. The first protrusions 11 are herringbone-shaped and have a forward opening, and the second protrusions 12 are herringbone-shaped and have a rearward opening. The first protrusions 11 and second protrusions 12 are arranged along the front-back direction of the forefoot portion 1, and the size of the second protrusion 12 along the front-back direction is larger than the size of the adjacent first protrusion 11 along the front-back direction, thereby improving the grip and propulsion of the sole. A plurality of third protrusions 13 and fourth protrusions 14 are arranged alternately along the front-back direction on the inner and outer edges of the forefoot portion 1 of the sole. The third protrusions 13 are herringbone-shaped and have an opening towards the outer edge of the forefoot portion 1, and the fourth protrusions 14 are herringbone-shaped and have an opening towards the middle of the forefoot portion 1. The size of the third protrusions 13 along the inner and outer directions is larger than the size of the adjacent fourth protrusions 14 along the inner and outer directions, thereby improving the grip and propulsion of the sole during changes of direction or zigzag running.

[0051] The description of the above specification and embodiments is used to explain the scope of protection of this application, but does not constitute a limitation on the scope of protection of this application.

Claims

1. A shoe sole, characterized in that, The forefoot portion (1) of the sole is provided with a plurality of first protrusions (11) and a plurality of second protrusions (12) for gripping the ground. The first protrusions (11) are in the shape of a V and have a forward opening. The second protrusions (12) are in the shape of a V and have a rearward opening. At least some of the first protrusions (11) and some of the second protrusions (12) are arranged alternately along the inner and outer directions. The size of the second protrusion (12) along the front and back directions is larger than the size of the adjacent first protrusion (11) along the front and back directions.

2. The sole as described in claim 1, characterized in that, The first protrusion (11) is arranged in the front-back direction, and the second protrusion (12) is arranged in the front-back direction.

3. The sole as described in claim 2, characterized in that, The forefoot portion (1) of the sole is provided with a number of third protrusions (13) and fourth protrusions (14) for gripping the ground on the inner and outer edges. The third protrusions (13) are in the shape of a herringbone and have an opening to the edge of the forefoot portion (1). The fourth protrusions (14) are in the shape of a herringbone and have an opening to the middle of the forefoot portion (1). At least some of the third protrusions (13) and some of the fourth protrusions (14) are arranged alternately in the front-back direction.

4. The sole as described in claim 3, characterized in that, The third protrusion (13) has a larger dimension along the inner and outer directions than the adjacent fourth protrusion (14) along the inner and outer directions.

5. The sole as described in claim 4, characterized in that, The first protrusion (11), the second protrusion (12), the third protrusion (13) and the fourth protrusion (14) are made of KPU material.

6. The sole as described in claim 5, characterized in that, The sole includes a midsole and a support member (20). The midsole is made of supercritical foam material. The support member (20) has an outer edge (21), a first support (22), a second support (23), and a through hole (24). The projections of the inner and outer sides of the outer edge (21) overlap with the projections of the first metatarsophalangeal joint, the fourth and fifth metatarsophalangeal joints, respectively. The projection of the first support member (22) overlaps with the projection of the second distal phalanx through the second and third metatarsophalangeal joints to the arch. The projection of the second support member (23) overlaps with the projection of the first proximal phalanx extending to the second proximal phalanx to the third middle phalanx. The projection of the through hole (24) overlaps with the projections between the first and second metatarsophalangeal joints and between the third and fourth metatarsophalangeal joints.

7. The sole as described in claim 6, characterized in that, The forefoot portion (1) of the sole is 19mm thick, the heel portion is 25mm thick, and the difference between the forefoot and heel is 6mm.

8. A type of shoe, characterized in that, Includes an upper, an insole, and a sole as described in any one of claims 1-7.

9. A shoe as described in claim 8, characterized in that, The insole is made of supercritical foam material, and the front of the insole has several through holes.

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