JP7202685B2 - footwear - Google Patents

Description

The present invention relates to footwear.

When a person walks while wearing shoes, after landing on the heel side, they land in order from the outside (little finger side) to the inside (thumb side) of the shoe toward the toe side, shifting the weight (center of gravity). It is known to make movements (aori movements).

Therefore, it is said that the movement of the center of gravity applied to the soles of the feet during walking is not linear in the direction of movement, but generally draws an inverted S-shaped curve.

So far, for example, a shoe sole structure disclosed in Patent Document 1 has been proposed in order to promote the rolling motion and provide proper walking.

JP 2008-29717 A

However, the structure disclosed in Patent Literature 1 does not have the concept of reducing foot fatigue, although it promotes rolling motion.

The present inventor analyzed the trajectory of one step in detail in order to optimize the trajectory of walking, and found that conventional shoes had room for improvement in how the weight was received at the time of heel strike.

That is, as shown in FIG. 7, the bone below the knee of a human leg is composed of the medial tibia K and the lateral fibula H, but the load should be mainly received by the medial thick tibia K. Therefore, the inventor of the present invention further reduced fatigue caused by walking by adopting a configuration in which the load is not received on the outside (fibula side) after landing on the heel and the load is received on the inside (tibia side) due to the rolling motion. We have completed the present invention.

SUMMARY OF THE INVENTION An object of the present invention is to provide footwear capable of supporting a load on the inside of the heel when landing on the heel.

The gist of the present invention will be described with reference to the accompanying drawings.

A footwear having grooves in the ground contact surface of the bottom 1 that contacts the ground when the user walks,
In the rear region A including the heel portion 21 of the ground contact surface, a plurality of first grooves 3 are provided in parallel, curved radially around a point X located outside the long axis L of the footwear,
The first groove 3 has a curved shape that slopes rearward from the inside to the outside and projects rearward,
In the front region B of the ground surface excluding the rear region A, a plurality of second grooves 4 are arranged in a curved radial shape around a point Y located inside the long axis L of the footwear ,
The second groove 4 has a curved shape that slopes rearward from the inside to the outside and protrudes forward,
In the rear region A, a plurality of curved third grooves 5 that intersect with the first grooves 3 and protrude inward are provided side by side, and the third grooves 5 and the first grooves 3 are partitioned. A plurality of rear ground blocks 7 are provided,
The rear ground block 7 is configured such that the ground area of the rear ground block 7 becomes larger in the area sandwiched between the two adjacent first grooves 3, and
In the front region B, a plurality of curved fourth grooves 6 that intersect with the second groove 4 and protrude outward are provided side by side. is provided with a front grounding block 8 of
The footwear characterized in that the front ground block 8 is configured such that the front ground block 8 located on the outer side has a larger ground contact area in the region sandwiched between the two adjacent second grooves 4. It is related to

Further, in the footwear according to claim 1, the outer portion of the rear region A is configured to be harder than the inner portion, and the inner portion of the front region B is harder than the outer portion. The footwear is characterized by being constructed as follows.

Further, in the footwear according to any one of claims 1 and 2, the outer side portion of the rear region A is formed thicker than the inner side portion, and the ground contact surface extends from the outer side to the inner side in the rear side region A. The inner side portion of the front region B is formed thicker than the outer side portion, and the ground contact surface is configured to slope from the inside to the outside in the front side region B. It relates to footwear characterized by

The footwear according to any one of claims 1 to 3 , wherein the front region B includes a toe portion 22 and an intermediate portion 23.

Further, in the footwear according to claim 4 , the intermediate portion 23 includes a part of the stepping portion 24 and the stepping portion 25 .

Since the present invention is configured as described above, the footwear can reduce fatigue caused by walking by supporting the load at the time of heel strike on the inside of the heel.

2 is a bottom view of the shoe for the left foot according to Example 1. FIG. 2 is a bottom view of the shoe for the left foot according to Example 1. FIG. 1 is a side view of a shoe for left foot according to Example 1. FIG. 1 is a plan view of a left foot shoe according to Example 1. FIG. FIG. 4 is a schematic diagram showing the relationship between the blood vessels near the top of the instep and the tightening adjuster. FIG. 10 is a bottom view of the shoe for the left foot according to Example 2; FIG. 4 is a schematic diagram showing the relationship between the fibula and the tibia;

A preferred embodiment of the present invention will be briefly described with reference to the drawings showing the operation of the present invention.

Since the interval between the first grooves 3 arranged side by side in the rear region A of the contact surface widens from the outside toward the inside, bending deformation due to forward movement of the load applied to the heel after heel strike during walking. is larger toward the inner side, thereby guiding the load applied to the heel to the inner side and preventing the load from being received on the outer side of the heel after the heel strikes.

In the front region B, the space between the second grooves 4 arranged side by side widens from the inside toward the outside, so when the bending deformation of the bottom progresses sequentially forward, the load is induced outward, causing a rolling motion. is not inhibited.

Therefore, when the footwear according to the present invention walks, as indicated by arrow T in FIG. progresses. Then, in the front region B, the movement of the weight to the outside due to the rolling motion is promoted, and the landing progresses from the stepping portion to the toe portion, and a kicking motion is performed at the toe portion. Since the center of gravity moves closer to the center as the walking speed increases, each of the above-mentioned promotional effects is particularly pronounced when walking slowly. → Weight shift to the center is performed well.

Therefore, according to the present invention, the load is received on the inner side of the heel when the heel strikes the ground, and a proper load is supported until the toe kicks off. Therefore, it is possible to realize a walking motion that suppresses the burden on the human body as much as possible.

A specific embodiment 1 of the present invention will be described with reference to the drawings.

This embodiment is an example in which the present invention is applied to a shoe having grooves on the contact surface of the sole portion 1 (sole portion) that contacts the ground when the user walks. It should be noted that the present invention can be applied not only to shoes but also to other footwear such as sandals. All of the shoes shown in Figures 1-4 are for the left foot. In addition, the code|symbol 2 is an instep part (upper part) in the figure.

First, the bottom portion 1 of this embodiment will be described.

As shown in FIGS. 1 and 2, in the rear region A including the heel portion 21 of the ground-contacting surface of the sole 1, radially extending around a point X located outside the sole and outside the long axis L of the shoe. A plurality of first grooves 3 are arranged in parallel. In this embodiment, the first grooves 3 are provided in a curved radial shape with the point X as the center. Note that the point X may be positioned inside the bottom instead of outside the bottom.

In addition, in the front region B excluding the rear region A of the ground contact surface, a plurality of second grooves 4 are arranged in parallel, radially centering on a point Y located inside the long axis L of the shoe and outside the bottom. It is In this embodiment, the second grooves 4 are provided in a curved radial shape with the point Y as the center. Note that the point Y may be positioned inside the bottom instead of outside the bottom. By providing the grooves in a curved radial shape, bending in accordance with weight shift can be performed more satisfactorily.

Here, the long axis L of the shoe is a straight line passing through the two most distant points on the outer periphery of the shoe, as shown in FIG. Further, the short axis S of the shoe is a straight line orthogonal to the long axis L passing through the middle point in the long axis direction of the shoe and two points on the outer periphery.

In this embodiment, the first grooves 3 are provided radially from a point X outside the long axis L and rearward of the central position in the long axis direction of the bottom portion 1 (grounding surface). That is, the point X is provided in the inner and outer rear areas of the four areas (outer front, outer rear, inner front and inner rear) divided by the long axis L and the short axis S into inner and outer and front and rear areas.

Further, the second grooves 4 are provided radially from a point Y on the inside of the long axis L and on the front side of the central position in the long axis direction. That is, the point Y is provided in the inner front area among the four areas.

In the rear region A, a plurality of third grooves 5 intersecting with the first grooves 3 are arranged side by side. 7 is formed. In this embodiment, the first groove 3 is provided so as to extend generally in the short axis side (inward-and-outward direction), and the third groove 5 is provided so as to extend generally in the long axis side (front-rear direction).

Specifically, the rear ground block 7 has a square tip ground contact surface (substantially flat tip surface) and has a slightly tapered tapered shape (trapezoidal shape) in a cross-sectional view.

At least some of the plurality of rear ground blocks 7 sandwiched between the two adjacent first grooves 3 are larger toward the inner side.

Specifically, since the first grooves 3 are provided in a curved radial shape that spreads inward from the outside of the ground contact surface, the tip ground contact surface of the rear ground block between the first grooves 3 is fan-shaped and becomes smaller toward the outside and toward the inside. (The volume also increases toward the inside.)

In the front area B, a plurality of fourth grooves 6 intersecting with the second grooves 4 are arranged side by side. formed. In this embodiment, the second groove 4 is provided so as to extend generally in the short axis side (inward-outward direction), and the fourth groove 6 is provided so as to extend generally in the long axis side (front-rear direction).

Specifically, the front grounding block 8 has a square tip grounding surface (substantially flat tip surface), and has a slightly tapered tapered shape (trapezoidal shape) in a cross-sectional view.

Similarly to the second groove 4, the fourth groove 6 is provided in a curved radial shape centered on a point Z located inside the long axis L of the shoe and outside the bottom portion (the point Z is also the other point It may also be located in the bottom.). In this embodiment, the fourth grooves 6 are radially provided from a point Z inside the long axis L and rearward of the central position in the long axis direction of the bottom (grounding surface). That is, the point Z is provided in the inner and rear areas among the four areas.

At least some of the plurality of front ground blocks 8 sandwiched between the two adjacent second grooves 4 are larger on the outer side.

Specifically, since the second groove 4 and the fourth groove 6 are provided in a curved radial shape that spreads from the inside to the outside, the front ground contact surface of the front ground block 8 becomes smaller toward the inside and larger toward the outside in a fan shape (volume also increases toward the outside).

By appropriately setting the degree of curvature and the degree of spread of each groove, it is possible to appropriately adjust the effect of promoting the movement of body weight inward immediately after landing on the heel and the rolling motion. Each groove other than the third groove 5 extends from the starting end to the terminal end with equal width and equal depth (the third groove 5 is widened on the rear end side), but the grooves may The depth and groove width can be set appropriately. The third grooves 5 are arranged side by side at substantially equal intervals so as to curve slightly outward from the rear to the front. Although the third grooves 5 are not provided radially in this embodiment, they may be provided radially. In this case, for example, of the four areas, the points may be provided in a curved radial shape around a point provided in the outer front area.

In this embodiment, the interval, center point, and degree of curvature of the second groove 4 and the fourth groove 6 are set so that the front ground block 8 becomes smaller toward the inside of the rear side and larger toward the outside of the front side.

Furthermore, by appropriately setting the hardness and thickness of the bottom portion 1 (height of the ground block with respect to the groove bottom portion) as follows, the reverse S-shaped movement of the center of gravity can be promoted even more satisfactorily.

The outer portion (the portion outside the long axis L) of the rear region A of the bottom portion 1 may be configured to be harder than the inner portion (the portion inside the long axis L). For example, by forming the outer portion with a harder material than the inner portion, or by making the rear ground block 7 on the outer side (between the first grooves 3) smaller, the outer portion is harder than the inner portion ( It is difficult to deform under load). For example, the row of rear ground blocks 7 outside the outermost third groove 5 is harder than the row of rear ground blocks 7 inside the innermost third groove 5 (the rear ground blocks 7 between them). 7 is set so that the hardness gradually increases from the inside to the outside.)

In addition, the outer side portion of the rear region A is formed thicker than the inner side portion (protrusion height with respect to the groove bottom is higher), and the ground contact surface is formed in the rear region A from the outer side to the inner side of the front of the shoe. It may be configured to be inclined upward when viewed (or viewed from the back). For example, the tip contact surface of each rear contact block 7 is an inclined surface that is inclined from the outside to the inside, and the rear area A of the contact surface of the bottom portion 1 is an inclined surface that is inclined from the outside to the inside as a whole. The degree of inclination of the tip contact surfaces of the respective rear contact blocks 7 is set such that In addition, this inclination should be such that it does not interfere with walking.

Further, the inner portion of the front region B may be configured to be harder than the outer portion. For example, the inboard portion can be made harder than the outboard portion by making the inboard portion harder than the outboard portion, or by making the inner front ground block 8 (between the second grooves 4) smaller. can be done. For example, the front contact block 8 near the arch of the foot is made harder than the front contact block 8 near the base of the little finger of the stepping portion 24 (the front contact block 8 between them is gradually harder from the outside to the inside). set.).

In addition, the inner side portion of the front region B is formed thicker than the outer side portion so that the ground contact surface in the front side region B slopes upward from the inside toward the outside when viewed from the front (or rear) of the shoe. may be configured. For example, the tip contact surface of each front contact block 8 is an inclined surface that is inclined from the inside to the outside, and the front area B of the contact surface of the bottom portion 1 is an inclined surface that is inclined from the inside to the outside as a whole. The degree of inclination of the tip contact surfaces of the front contact blocks 8 is set as follows. In addition, this inclination should be such that it does not interfere with walking.

In this embodiment, the front region B includes a toe portion 22 and an intermediate portion 23. As shown in FIG. Specifically, the intermediate portion 23 is composed of a stepping portion 24 (a region near the base of each finger) and part of a stepping portion 25 (a region including the arch portion and its outer portion). A fifth groove 9 that separates the rear area A and the front area B is provided in the stepless portion 25 . The fifth groove 9 may also serve as the first groove 3 .

The fifth groove 9 is provided on the rear side of the central position in the longitudinal direction of the ground contact surface. Also, the fifth groove 9 is slanted rearward from the inner side to the outer side. In this embodiment, the configuration is such that the inclination is approximately 45°.

Therefore, part of the tread portion 25 defined by the fifth groove 9 is included in the rear region A, and the remaining portion is included in the front region B. As shown in FIG. In this case, the weight shift from the inside after heel landing to the outside along with the rolling motion can be performed more favorably.

The rear region A should include at least the heel portion 21. For example, the rear region A and the front region B are partitioned by the fifth groove 9 between the heel portion 21 and the stepping portion 25. You can

Each grounding block can be appropriately provided with an uneven portion for slip prevention. In the present embodiment, uneven portions are provided on the grounding blocks on the inner side of the rear side region and the outer side of the front side region, which particularly require a grip. Specifically, in order to gradually increase the grip force, the ground block in the initial portion of the weight shift is not provided with unevenness, and the final portion of the weight shift in the rear region and the front region (the inner part of the rear region and the The ground block on the outer side of the front area) is provided with uneven portions so as to make it difficult to slip step by step.

In this embodiment, each groove is provided in a curved shape, but may be provided in a straight line. Further, one or both of the third groove 5 and the fourth groove 6 may be provided radially or in parallel, and one or both of the third groove 5 and the fourth groove 6 may be omitted. .

Since the bottom portion 1 of the present embodiment is configured as described above, the interval between the first grooves 3 arranged side by side in the rear region A of the ground contact surface widens from the outside toward the inside (vertical direction bends toward the inside). After the heel strikes during walking, the bending deformation due to the forward movement of the load on the heel is greater toward the inner side. Loading on the outside is prevented.

In the front region B, the space between the second grooves 4 arranged side by side widens from the inside toward the outside, so when the bending deformation of the bottom progresses sequentially forward, the load is induced outward, causing a rolling operation. is not inhibited.

Therefore, in this embodiment, when walking, as shown by the arrow T in FIG. 1, after landing on the heel, the weight shifts from the center of the heel to the inside in the rear area A, and the landing progresses to the front area B. do. Then, in the front region B, the movement of the weight to the outside due to the rolling motion is promoted, and the landing progresses from the stepping portion to the toe portion, and a kicking motion is performed at the toe portion.

Further, the rear contact block 7 between the first grooves 3 becomes larger toward the inside, and the front contact block 8 between the second grooves 4 becomes larger toward the outside. Therefore, the closer to the inner end of the rear region and the outer end of the front region, the better the gripping force is exerted, which makes it possible to stably and favorably shift the weight without causing wobble or wobble.

Therefore, according to the sole portion 1 of the present embodiment, the load is received on the inner side of the heel when the heel strikes the ground, and an appropriate load is supported until the toe kicks off. Therefore, it is possible to realize a walking motion that suppresses the burden on the human body as much as possible.

As shown in FIGS. 3 and 4, the instep part 2 of this embodiment includes a pair of blade parts 12 in which a plurality of lacing holes 11 are arranged in parallel on the outer side of the instep part 2a, and A tightening adjuster 10 is provided which includes a shoelace 13 inserted through the lacing hole 11 .

In this embodiment, the shoelace 13 is formed to have a diameter larger than the diameter of the lace through hole 11 in the longitudinal direction of the lace, and is elastically deformed to extend and elastically deform in the pulling operation direction by a pulling operation. The shoelace 13 has a hump region portion in which a plurality of hump-shaped portions 13a deformed to have a smaller diameter than the diameter of the lace through-hole 11 are arranged side by side.

The shoelace 13 is passed through the lacing hole 11 and is passed through the last through the lacing hole 11 while attached to the instep 2a. The knob-shaped portion 13a engaged inside the lacing hole 11 is stretched and elastically deformed by the pulling operation, becomes smaller in diameter than the lacing hole 11, moves through the lacing hole 11, and is tightened. By releasing the pulling operation in this tightened state, the hump-shaped portion 13a that has passed through the lacing hole 11 changes from the small diameter state to the original diameter larger than that of the lacing hole 11. It is deformed back to the state (undeformed state), and becomes incapable of returning and passing through the stringing hole 11 through which it passed last.

In addition, the shoelace 13 of this embodiment has a diameter smaller than the diameter of the lacing hole 11 and a substantially constant thickness over substantially the entire area (central portion in the longitudinal direction) between the hump regions provided at both ends. The one provided with the constant-thickness area|region part formed is employ|adopted. In addition, instead of the constant thickness area described above, a small-diameter bump area having a plurality of small-diameter bumps smaller than the hole diameter of the lacing hole 11 arranged side by side at intervals is provided between the bump areas. You can adopt something.

In addition, the interval between the blade portions 12 of this embodiment is set to be such an interval that the blades 12 can be tightly closed without any gap. In other words, by adjusting the tightening of the shoelace 13, it is possible to make the outer appearance exhibiting a straight boundary without gaps between the blades 12. FIG.

In addition, the instep portion 2 is provided with fastening portions 14 to which both ends of the shoelace 11 can be fastened, respectively, on the outer sides of the instep portion 2a. In this embodiment, the fastening portion 14 is located outside the tightening adjustment portion 10, and includes the uppermost cord through hole 11 of the outer blade portion 12 and the uppermost cord hole of the inner blade portion 12. It is provided vertically below the through hole 11 .

In addition, the uppermost lacing hole 11 of the outer wing portion 12 and the uppermost lacing hole 11 of the inner wing portion 12 are positioned so that the straight lines extending vertically downward are parallel to each other (shoes). position shifted in the front-rear direction).

The fixing portion 14 has a shoelace insertion hole (not shown) that can pass through when the hump portion 13a is small in diameter, but cannot pass through when it is in its original large diameter state, similar to the lace insertion hole 11. there is Specifically, a base portion (not shown) of a size that is hidden behind a surface portion having a shoelace insertion hole is provided on the back side of a rounded diamond-shaped surface portion. The shoelace insertion holes are holes facing in the vertical direction (vertical direction), and are arranged side by side in two in the longitudinal direction of the shoe. The ends of the shoelace 13 that have passed through the uppermost lacing hole 11 are passed through the shoelace insertion holes in the same manner as described above, so that they cannot be returned and fastened in a good appearance.

Also, the length of the shoelace 13 is such that it does not come into contact with the ground (floor) when both ends are fastened to the fastening portions 14 . Specifically, the length is such that it is positioned above the sole portion 1 when both ends are fastened to the fastening portions 14 .

It should be noted that the fixing portions 14 may be provided on the outer side and the inner side, respectively. In this case, the ends passing through the last passing lacing hole 11 of the outer wing portion 12 and the last passing lacing hole 11 of the inner wing portion 12 are respectively attached to the outer side of the outer wing portion 12. The attachment portion 14 and the fastening portion 14 closer to the inner side than the inner blade portion 12 are attached to each other. In this case, one shoelace insertion hole is provided in each fixing portion 14 .

Further, in this embodiment, no toecap member for reinforcing the toe holding portion 20 is provided between the front member 17 and the back member (not shown) constituting the toe holding portion 20, and the heel holding portion 20 is A moon-shaped core member that reinforces the heel holding portion 19 is not provided between the front member 18 and the back member (not shown) that constitute the portion 19 . Therefore, the toe and heel of the user are not pressed by the toecap member and the moon-shaped core member (movement is less likely to be hindered).

In this embodiment, a band-shaped slip-off prevention member 15 extending in the width direction of the foot is provided on (outside of) the heel holding portion 19 to prevent the heel from slipping off. The coming-off prevention member 15 is provided in a semi-circular shape along the outer shape of the rear side of the heel. The removal prevention member 15 can be made of a material having appropriate elasticity, such as silicon. Reference numeral 16 in the figure is a pull strap.

Since the instep part 2 of this embodiment is constructed as described above, the tightening adjustment part 10 can be applied to the instep part 2a that is displaced from the blood vessel 31 near the instep apex of the foot 30, as shown in FIG. By being provided on the outer side, the blood vessels 31 near the apex of the instep are less likely to be compressed when tightened, and the blood vessels 31 are less likely to be compressed due to the thickness of the wings of the tightening adjusting portion 10 and the like.

In addition, by adopting a shoelace 13 that can be stretched and elastically deformed by a pulling operation, the pressure on blood vessels due to the shoelace 13 is suppressed as much as possible.

Further, by fastening both ends of the shoelace 13 (for example, passing through the uppermost lace hole 11 at the end) to fastening portions 14 provided on the outer side of the instep 2a, the foot can be Compression of important blood vessels 31 near the top of the instep is prevented as much as possible.

In addition, both ends of the shoelace 13 are aligned on the outer side of the instep 2a, which makes the design very beautiful.

In addition, without providing a toe core member in the toe holding part 20 and without providing a moon-shaped core member in the heel holding part 19, the heel holding part 19 has a band-shaped slip-off prevention band extending in the width direction of the foot that prevents the heel from slipping out. By providing the body 15, it is possible to reduce the pressure from the front and back direction (toe/heel direction) of the shoe while preventing the heel from coming off, and to suppress the pressure on the blood vessels of the foot well.

Therefore, the instep part 2 of this embodiment hardly presses the blood vessels near the apex of the instep, and inhibits the blood circulation and blood flow of the whole body as much as possible. In combination with the configuration of (1), good walking can be performed with as little burden on the human body as possible.

Although the drawings describe the left-foot shoe, the same applies to the right-foot shoe (only symmetrical).

Embodiment 2, as shown in FIG. 6, is an example in which a communicating groove 40 is provided that smoothly continues from the rear region A to the front region B without interruption.

That is, the portion existing in the rear region A of the communicating groove 40 was defined as the third groove 5, and the portion existing in the front region B was defined as the fourth groove 6 (the third groove 5 and the fourth groove 6 are provided in series). ) is an example. Note that the front region B also includes a portion where only the fourth groove 6 is provided.

By providing the communication groove 40 extending from the rear end to the front end, the weight shift from the heel side to the toe side described above can be easily performed. The communication groove 40 is curved (serpentine) like the arrow T, but the shape can be appropriately set according to the use of the footwear, such as being linear.

The remainder is the same as in the first embodiment.

1 bottom 3 first groove 4 second groove 5 third groove 6 fourth groove 7 rear ground block 8 front ground block
21 heel
22 Toe
23 Intermediate
24 Trample
25 Unstepped part A Rear area B Front area L Long axis

Claims (5)

A footwear having grooves on the ground contact surface of the bottom portion that contacts the ground when the user walks,
A plurality of first grooves arranged in a curved radial shape centering on a point X located outside the long axis of the footwear are arranged in a rear region of the ground contact surface including the heel,
The first groove has a curved shape that slopes rearward from the inside to the outside and protrudes rearward,
A plurality of second grooves are arranged side by side in a curved radial shape around a point Y located inside the long axis of the footwear in the front region of the ground contact surface excluding the rear region ,
The second groove has a curved shape that slopes rearward from the inside to the outside and protrudes forward,
In the rear region, a plurality of curved third grooves that intersect with the first grooves and protrude inward are provided side by side, and a plurality of rear grounds are partitioned by the third grooves and the first grooves. A block is provided,
The rear ground block is configured such that the rear ground block positioned more inwardly has a larger ground contact area in the region sandwiched between the two adjacent first grooves,
In the front region, a plurality of curved fourth grooves that intersect with the second grooves and protrude outward are provided side by side, and a plurality of front ground blocks partitioned by the fourth grooves and the second grooves are provided. provided,
The footwear according to claim 1, wherein the front ground blocks are configured such that the front ground blocks positioned further outward have a larger ground contact area in a region sandwiched between the two adjacent second grooves . 2. The footwear of claim 1, wherein an outboard portion of the rear region is configured to be harder than an inboard portion and an inboard portion of the front region is configured to be harder than an outboard portion. Footwear characterized by: In the footwear according to any one of claims 1 and 2, the outer side portion of the rear region is formed thicker than the inner side portion, and the ground contact surface slopes from the outside toward the inside in the rear region. wherein the inner portion of the front region is formed thicker than the outer portion, and the ground contact surface is configured to slope from the inside toward the outside in the front region. . Footwear according to any one of claims 1-3 , wherein the front region includes a toe portion and an intermediate portion. 5. Footwear according to claim 4 , wherein the intermediate section includes a tread section and a portion of a tread section.

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