Sole structure and shoe

Abstract

A sole structure and shoe that enable a wearer to stably maintain an upright posture are provided. A sole structure of a shoe in which a rearfoot-side concave-shaped portion (28) having an apex region (32) is formed in a bottom surface rearfoot region of a sole (14), the apex region (32) being positioned at the highest position within the bottom surface of the sole (14) in the bottom surface rearfoot region and being positioned at a position corresponding to the center of the heel of the wearer so that the center of pressure of the wearer and the center of the heel overlap. With this structure, the wearer can stably maintain an upright posture.

Description

TECHNICAL FIELD

[0001] The present application relates to a sole structure and a shoe. BACKGROUND

[0002] In the past, various sole structures have been proposed in order to improve the wearability for a wearer (for example, Patent Literature 1 and Patent Literature 2).

[0003] [Related Art Documents]

[0004] [Patent Literature]

[0005] Patent Literature 1: Japanese Patent Laid-Open No. 2019-162357

[0006] Patent Literature 2: International Publication No. 2010 / 038266 SUMMARY

[0007] [Problems to be Solved by the Invention]

[0008] In a case where a wearer stands and works or sings, in order to fully exert the ability, the wearer needs to maintain an upright posture. In order to stably maintain the upright posture for the wearer, it is ideal that the heel center of the wearer overlaps with the center of pressure (COP) of the wearer. However, there is no sole structure developed from such a viewpoint.

[0009] An object of the present application is to provide a sole structure that enables a wearer to stably maintain an upright posture.

[0010] [Technical Means to Solve the Problems]

[0011] In order to solve the problem, one aspect of the present application is a sole structure of a shoe in which a rear foot side concave shaped portion having an apex region is formed in a bottom surface rear foot region of a sole, the apex region is positioned at the highest position within a sole bottom surface in the bottom surface rear foot region, and is positioned at a position corresponding to a heel center of a wearer so that a center of pressure of the wearer overlaps with the heel center. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a plan view showing the skeleton of a foot.

[0013] Figure 2 is a perspective view of a shoe.

[0014] Figure 3 is a bottom view of a sole.

[0015] Figure 4 is a sectional view of an A-A section of Figure 3 ​

[0016] Figure 5 is a sectional view of a B-B section of Figure 3

[0017] Figure 6 is a sectional view of a C-C section of Figure 3

[0018] Figure 7 is a sectional view of a D-D section of Figure 3

[0019] Figure 8 is a medial side side view of a sole.

[0020] Figure 9 is a sectional view of an A-A section of a sole based on a modification example.

[0021] Figure 10 is a sectional view of an A-A section of a sole based on a modification example.

[0022] Figure 11 is a sectional view of an A-A section of a sole based on a modification example.

[0023] [Explanation of symbols]

[0024] 10: shoe

[0025] 12: upper

[0026] 14: sole

[0027] 20: forefoot region

[0028] 22: midfoot region

[0029] 24: heel region

[0030] 28: rearfoot concave shape portion

[0031] 32: apex region

[0032] 34: boundary bulge portion

[0033] 38: thin wall portion

[0034] 40: midfoot bulge portion

[0035] 52: rolled portion

[0036] 100: rearfoot concave shape portion

[0037] 102: heel bulge portion

[0038] 104: heel bulge portion

[0039] 110: rearfoot concave shape portion

[0040] ​​​112: apex region

[0041] 120: rear lateral concave shape portion DETAILED DESCRIPTION

[0042] First, the definition of the terms used in this specification will be explained. In this specification, as terms indicating directions, the front-rear direction, the width direction, and the up-down direction are sometimes used, but the terms indicating these directions indicate the directions when the shoe is placed on a flat surface and observed from the viewpoint of the wearer when the shoe is worn. Therefore, the front direction refers to the toe side, and the rear direction refers to the heel side. In addition, as terms indicating directions, the medial side and the lateral side are sometimes used, and the medial side refers to the width direction inner side of the foot, that is, the thumb (first finger) side of the foot, and the lateral side refers to the side opposite to the medial side in the width direction.

[0043] In addition, in the following description, the directions are sometimes explained using a three-dimensional orthogonal coordinate. In that case, the X axis extends from the medial side to the lateral side, the Y axis extends from the heel side to the toe side, and the Z axis extends from the bottom side to the upper side.

[0044] In addition, before the description of the shoe based on the embodiment is made, the shoe described in Figure 1 The bones of the foot related to the shoe based on the embodiment are described.

[0045] Figure 1 is a plan view indicating the bones of the foot. The foot of the human body mainly includes the wedge bone Ba, the cuboid bone Bd, the scaphoid bone Bc, the talus Bb, the calcaneus Be, the metatarsal bone Bf, and the phalanx Bg. The joints of the foot include the metatarsophalangeal (MP) joint Ja, the Lisfranc joint Jb, and the Chopart joint Jc. The Chopart joint Jc includes the calcaneocuboid joint Jc1 formed by the cuboid bone Bd and the calcaneus Be, and the taloscaphoid joint Jc2 formed by the scaphoid bone Bc and the talus Bb. In this specification, the "forefoot portion" of the wearer refers to the portion more forward than the MP joint Ja, and if converted in terms of the length ratio of the shoe, it refers to the portion of 0% to about 30% of the total length of the shoe when measured from the toe side. The "forefoot region" of the sole bottom refers to the region of the sole overlapping with the forefoot portion when viewed from above. In addition, the "midfoot portion" refers to the portion from the MP joint Ja to the Chopart joint Jc, and likewise, it refers to the portion of about 30% to 80% of the total length of the shoe when measured from the toe side. The "midfoot region" of the sole bottom refers to the region of the sole overlapping with the midfoot portion when viewed from above. In addition, the "hindfoot portion" refers to the portion more rearward than the Chopart joint Jc, and likewise, it refers to the portion of about 80% to 100% of the total length of the shoe when measured from the toe side. The "hindfoot region" of the sole bottom refers to the region of the sole overlapping with the hindfoot portion when viewed from above. In addition, in the following description, the "heel portion" refers to the portion of the heel, and the "toe portion" refers to the portion of the toe.Figure 1 In the drawing, the center line S indicates a center line of the shoe, extending along a central portion in the foot width direction. The center line S assumes a position on a straight line passing through the third metatarsal bone Bf3 of the human body and the heel bone protrusion medial side Be1 of the heel bone protrusion of the wearer at rest. In the drawing, the range in which the heel bone protrusion medial side Be1 is assumed to be present is indicated by S1. The range in which the heel bone protrusion medial side Be1 is present overlaps the center of the heel of the wearer at rest. The proportion in the total length of the shoe is a reference, and the ranges of the forefoot portion, the midfoot portion, and the rearfoot portion are not limited. Figure 1 In the drawing, the range in which the heel bone protrusion medial side Be1 is assumed to be present is indicated by S1. The range in which the heel bone protrusion medial side Be1 is present overlaps the center of the heel of the wearer at rest. The proportion in the total length of the shoe is a reference, and the ranges of the forefoot portion, the midfoot portion, and the rearfoot portion are not limited.

[0046] Figure 2 is a perspective view of the shoe. As shown in the drawing, Figure 2 The shoe 10 includes an upper 12 and a sole 14. The upper 12 has a shape that wraps around the instep of the wearer.

[0047] The upper 12 is engaged with the sole 14 along the outer periphery of the sole 14. As the upper 12, various members such as a rope shoe in which the fit of the upper can be adjusted by a rope, a slip-on shoe that does not have a fastening mechanism such as a rope, and a sock can be adopted.

[0048] The sole 14 includes one or both of a midsole and an outsole. Therefore, in the following, in the case where the shape or the like of the sole is referred to, unless specifically indicated, the term "sole" refers to the entire sole 14 including the midsole and the outsole and considering both as one. The sole 14 functions to absorb impact, and a part or all thereof is formed of a soft material that absorbs impact, such as a foamed Ethylene Vinyl Acetate (EVA), or a foamed urethane, a foamed thermoplastic elastomer, a gel (GEL), or a soft material containing cork. As the material forming the midsole 16, it is preferable that the Young's modulus be 10 MPa or less (at 10% strain), or the measured value based on the Asker rubber durometer type C be 70 or less.

[0049] Figure 3 is a bottom view of the sole. Figure 4 is a sectional view of the A-A section of Figure 3 Figure 5 is a sectional view of the B-B section of Figure 3 Figure 6 is a sectional view of the C-C section of Figure 3 Figure 7 is a sectional view of the D-D section of Figure 3

[0050] ​​​​The sole 14 includes a forefoot region 20 corresponding to the forefoot of the wearer's foot, a midfoot region 22 corresponding to the midfoot of the wearer's foot, and a heel region 24 corresponding to the heel of the wearer's foot. The forefoot region 20, midfoot region 22, and heel region 24 are arranged continuously from the toe to the heel. The sole 14 has a highly designed shape with uneven surfaces throughout and no flat surfaces or almost no flat surfaces.

[0051] like Figure 3 , Figure 4 and Figure 7 As shown, a pair of raised portions (hereinafter referred to as "rear foot raised portions") 26 are formed in the rear foot region 24, which are disposed on both sides in the width direction and extend along the Y-axis, and a rear foot side concave shape portion 28 is disposed between the pair of rear foot raised portions 26. The rear foot side concave shape portion 28 and the pair of rear foot raised portions 26 are arranged in a row in the width direction.

[0052] The concave portion 28 on the rear foot side is a space with an upwardly recessed arc-shaped or truncated cone shape. The concave portion 28 on the rear foot side is formed by an inclined slope 30 and a generally flat apex region 32. The apex region 32 is circular and positioned corresponding to the center of the wearer's heel. The apex region 32 is located at the highest point (+Z side) within the rear foot region 24. That is, within the rear foot region 24, there is no bottom surface of the sole 14 at a position higher than the apex region 32. This means that the thickness of the sole 14 is thinnest within the rear foot region 24 at the apex region 32. The slope 30 surrounds the entire circumference of the apex region 32. The height of the slope 30 gradually increases towards the apex region 32. That is, the bottom surface of the sole 14 within the rear foot region 24 has a shape that rises upwards towards the apex region 32 in the entire direction including the front-to-back and width directions. The concave portion 28 on the rear foot side can also be considered as having a dome shape in the AA and DD cross sections. By adopting this shape, in the apex region 32, the dome shape is slightly compressed when the wearer's weight is applied to the center of the heel. As a result, the wearer's center of gravity becomes easier to concentrate in the apex region 32, and the wearer's COP overlaps with the apex region 32. Thus, the wearer can stably maintain an upright posture.

[0053] The heel protrusions 26 are disposed at both ends of the heel region 24 in the width direction and extend along the edge of the heel region 24. The heel protrusions 26 have a shape that bulges downward relative to the concave shape 28 on the heel side. Conversely, it can also be said that the concave shape 28 on the heel side has a shape that bulges upward relative to the heel protrusions 26. The top surface (end surface on the -Z side) of the heel protrusions 26 is the surface in the heel region 24 that contacts the imaginary plane when the shoe 10 is positioned on the imaginary plane H without applying a load. The inner side of the heel protrusions 26 in the width direction is defined by the inclined surface 30 of the concave shape 28 on the heel side. That is, the heel protrusions 26 are continuous with the concave shape 28 on the heel side. The bottom surface of the shoe 10 is depicted in section AA as a curve L1 with an inflection point and differentiable.

[0054] A boundary ridge 34 (equivalent to a "first ridge") extending along the X-axis is formed on the toe side of the concave-shaped portion 28 on the heel side. The boundary ridge 34 is formed at the boundary between the midfoot region 22 and the heel region 24, extending transversely across the bottom surface of the sole 14 in the width direction. The boundary ridge 34 has a shape that protrudes downward relative to the concave-shaped portion 28 on the heel side. Conversely, it can also be said that the concave-shaped portion 28 on the heel side has a shape that protrudes upward relative to the boundary ridge 34. The ridge height of the boundary ridge 34 is lower than the ridge height of the heel ridge 26, and the apex of the boundary ridge 34 does not contact the imaginary plane H in the unloaded state. Alternatively, it can be designed so that the boundary ridge 34 contacts the imaginary plane H. The heel side of the boundary ridge 34 is defined by the slope 30 of the concave-shaped portion 28 on the heel side. That is, the boundary ridge 34 is continuous with the concave-shaped portion 28 on the heel side. The sole of shoe 10 is depicted with a curve L2 that has an inflection point and is differentiable on the heel side of the boundary ridge 34 of the DD section.

[0055] A rear ridge 36 extending along the X-axis is formed on the heel side of the concave-shaped portion 28 on the heel side. The rear ridge 36 extends in the width direction so that the heel-side ends of the rear ridge 26 are connected to each other in the width direction. The rear ridge 36 has a shape that protrudes downward relative to the concave-shaped portion 28 on the heel side. Conversely, it can also be said that the concave-shaped portion 28 on the heel side has a shape that protrudes upward relative to the rear ridge 36. The ridge height of the rear ridge 36 is lower than the ridge height of the rear ridge 26, and the apex of the rear ridge 36 does not contact the imaginary plane H in the unloaded state. Alternatively, the rear ridge 36 can also be designed to contact the imaginary plane H. The toe side of the rear ridge 36 is defined by the slope 30 of the concave-shaped portion 28 on the heel side. That is, the rear ridge 36 is continuous with the concave-shaped portion 28 on the heel side. The sole of shoe 10 is depicted with a curve L3 that has an inflection point and is differentiable on the toe side of the rear ridge 36 in the DD section. The heel side S1 of the rear ridge 36 has a downwardly convex curved shape.

[0056] A pair of hindfoot ridges 26, a boundary ridge 34, and a rear ridge ridge 36 work together to form a ridge (equivalent to a fourth ridge) that surrounds the entire circumference of the concave shape portion 28 on the hindfoot side. In this way, by surrounding the entire circumference of the concave shape portion 28 on the hindfoot side, the wearer's center of gravity becomes easier to concentrate from the entire direction of the apex region 32 toward the apex region 32.

[0057] like Figure 3 , Figure 5 and Figure 7 As shown, the midfoot region 22 has an upwardly concave shape in both the BB and DD cross-sections. Near the center of the midfoot region 22 in both the front-to-back and width directions, a thin-walled portion 38 of the sole 14 is formed. The heel side of the thin-walled portion 38 is defined by the inclination of the toe side of the boundary ridge 34. That is, the bottom surfaces of the boundary ridge 34 and the thin-walled portion 38 trace a continuous curve L4 in the DD cross-section.

[0058] like Figure 3 , Figure 6 and Figure 7 As shown, in the middle leg region 22, a pair of middle leg ridges 40 are formed on the toe side, which is closer to the thin-walled portion 38. The pair of middle leg ridges 40 are disposed at both ends of the middle leg region 22 in the width direction and extend along the edge of the middle leg region 22 in the Y-axis direction. A middle leg side concave shape portion 42 is formed between the middle leg ridges 40.

[0059] The concave shape 42 on the midfoot side is a space with an upwardly recessed arc-shaped pit or a truncated cone shape. The concave shape 42 on the midfoot side is formed by an inclined slope 44 and a generally flat apex region 46. A pair of intermediate ridges 48 are formed on the toe side and the heel side of the concave shape 42 on the midfoot side. Therefore, the concave shape 42 on the midfoot side is surrounded by a pair of midfoot ridges 40 and a pair of intermediate ridges 48.

[0060] A pair of midfoot bulges 40 (corresponding to the second and third bulges) have a shape that bulges downward relative to the midfoot-side concave shape 42. Conversely, the midfoot-side concave shape 42 can also be described as having a shape that bulges upward relative to the midfoot bulges 40. The top surface (end face on the -Z side) of the midfoot bulge 40 is the only surface in the midfoot region 22 that contacts the imaginary plane H when the shoe 10 is positioned on an imaginary plane without applying a load. The inward side of the midfoot bulge 40 in the width direction is defined by the inclined surface 44 of the midfoot-side concave shape 42. That is, the midfoot bulge 40 is continuous with the midfoot-side concave shape 42. The bottom surface of the shoe 10 is depicted in the CC section as a curve L5 with an inflection point and differentiable.

[0061] Near the boundary between the forefoot region 20 and the midfoot region 22, at the wearer's MP joint Ja (refer to...) Figure 1A concave shape 50 extending in the width direction is formed at the corresponding position on the forefoot side. The concave shape 50 on the forefoot side is an upwardly recessed groove that traverses the forefoot region 20 and extends in the width direction. The sole 14 has an upwardly curved surface S2 formed on the toe side of the concave shape 50 on the forefoot side, and has a shape such that the bottom surface of the sole 14 is far from the imaginary plane H.

[0062] Reference Figures 4 to 7 A rolled-up portion 52 is formed on the upper surface of the sole 14. The rolled-up portion 52 is formed to surround the periphery of the sole 14 and has a shape that rises upward from the upper surface of the sole 14. The height of the rolled-up portion 52 varies depending on the location, and the upper end 54 of the rolled-up portion 52 has a wavy shape. The height of the rolled-up portion 52 refers to the distance from the upper surface of the sole 14 to the upper end 54 on the inner side of the width direction of the rolled-up portion 52. The rolled-up portion 52 is formed higher in the midfoot region 22 and lower in the forefoot region 20 and the rearfoot region 24. The rolled-up portion 52 also has the highest height at the position corresponding to the thin-walled portion 38 in the midfoot region 22.

[0063] Ideally, the height of the rolled-up portion 52 at the position corresponding to the thin-walled portion 38 should be higher than not only the height of the rolled-up portion 52 located in the midfoot region 22, but also higher than the height of the rolled-up portion 52 located in the forefoot region 20 and the rearfoot region 24. However, in special soles such as those with a toe spring structure, the front or rear end of the sole faces extremely upwards, and correspondingly, the rolled-up portion sometimes becomes higher. Therefore, when applying the sole structure of the embodiment to a sole having such a special structure, the height of the rolled-up portion 52 can be lower than the height of the rolled-up portion near the front or rear end of the sole. The term "near the front end of the sole" as used herein refers to a range of 0% to 10%, where the front end of the sole is set to 0% on a scale and the rear end to 100%. Conversely, "near the rear end" refers to a range of 90% to 100% on the same scale.

[0064] At the position corresponding to the thin-walled portion 38, the rigidity is lower than that of the thicker parts of the sole 14 due to the thinness of the sole 14. Therefore, by increasing the height of the position corresponding to the thin-walled portion 38 and the rolled-up portions 52 before and after it, the rigidity near the thin-walled portion 38 can be ensured.

[0065] Figure 8 This is a side view of the shoe sole from the inside of the foot. (Example) Figure 8 As shown, when viewed from the inner foot side, the sole 14 has a wavy shape with upward indentations at the positions of surface S2, the concave portion 50 and thin-walled portion 38 on the forefoot side, and the heel side S1. The wavy shape is the same when viewed from the outer foot side. On the other hand, as... Figure 7As shown, in the DD cross-section of the sole 14, the bottom surface of the sole 14 has an upwardly concave, wavy shape at the positions of surface S2, the forefoot side concave shape portion 50, the midfoot side concave shape portion 42, the thin-walled portion 38, the rearfoot side concave shape portion 28, and the heel side S1. Comparing the two, the number of concave portions in the DD cross-section is greater than the number of concave portions when viewed from the side. The number of upwardly concave shapes is related to the number of downwardly convex shapes; therefore, the number of downwardly convex shapes when viewing the sole 14 from the inside of the foot can be said to be the same as the number of downwardly convex shapes in the DD cross-section. The reason for the difference in the number of concave portions is that the midfoot side concave shape portion 42 and the rearfoot side concave shape portion 28 are respectively held by the midfoot bulge portion 40 and the rearfoot bulge portion 26, and cannot be seen from the side. This sole 14 has a very high degree of design sophistication.

[0066] Next, the function of shoe 10 will be explained.

[0067] When the wearer puts on the shoe 10 and assumes an upright posture, in the rear foot region 24, the rear foot bulge 26 tilts inward in the width direction, and the rear foot side concave shape 28 sinks downward. As a result, the wearer's COP moves towards the apex region 32. At the same time, in the midfoot region 22, the wearer is supported by the midfoot bulge 40. That is, since the wearer's rear foot side is stably supported by the rear foot side concave shape 28, and the midfoot side and forefoot side are supported by a pair of midfoot bulges 40, there are three support points on the bottom surface of the sole 14.

[0068] When the wearer is running, the sole 14 may sometimes twist or bend around the Y-axis, but the rolled-up portion 52 near the thin-walled portion 38 resists the torsional deformation and bending. When the wearer lands while running, the foot swings forward from side to side because it can land on the side of the heel S1.

[0069] When the wearer jumps and lands, the concave shape of the rear foot side part 28 cushions the impact of landing.

[0070] As described above, according to the embodiment, by concentrating the center of gravity on the concave shape 28 on the rear foot side, the wearer can easily maintain an upright posture. This makes it easier to perform actions requiring a stable upright posture, such as singing. The effect of maintaining an upright posture can be further enhanced by a pair of midfoot protrusions 40. Furthermore, through a support configuration similar to a three-point support based on the concave shape 28 on the rear foot side and the midfoot protrusions 40, the wearer can more easily maintain an upright posture.

[0071] Furthermore, by adjusting the height of the rolled-up portion 52 and raising it near the thin-walled portion 38, the rigidity of the thin-walled portion 38 can be ensured. In addition, since the heel side S1 of the sole 14 has a downwardly convex curved shape, the wearer can easily shift their center of gravity and perform running movements due to the synergistic effect of the rigidity of the thin-walled portion 38 and the curved shape.

[0072] In addition, by making the concave shape 28 on the rear foot side into an arc-shaped cavity, the concave shape 28 on the rear foot side also functions as a cushioning structure when the wearer jumps and lands.

[0073] Thus, the shoe and sole structure based on the implementation method are particularly suitable for artists who sometimes sing while performing vigorous dances or other similar activities.

[0074] This invention is not limited to the embodiments described, and the structures of each embodiment can be adapted. The following variations are conceived within the scope of this invention.

[0075] Figure 9 This is a cross-sectional view of the sole based on a modified example, specifically section AA. In this figure, to clarify the... Figure 4 The structural differences shown are indicated by dashed lines. Figure 4 The cross-sectional shape of the shoe sole is shown. For example... Figure 9 As shown, the width of the rear foot bulge 102 on the inner foot side of the concave-shaped portion 100 is wider than that of the rear foot bulge 26, while the width of the rear foot bulge 104 on the outer foot side is narrower than that of the rear foot bulge 26. The widths of the rear foot bulges 102 and 104 are adjusted by changing the curvature of the bottom surface. In this structure, by widening the rear foot bulge 102, it functions as a structure to prevent overpronation. Conversely, by narrowing the rear foot bulge 104, it becomes more easily deformable, functioning as a buffer structure on the outer foot side where loads are easily applied.

[0076] Figure 10 and Figure 11 This is a cross-sectional view of the sole based on a modified example, specifically section AA. In this figure, to clarify the... Figure 4 The structural differences shown are indicated by dashed lines. Figure 4 The cross-sectional shape of the shoe sole is shown. For example... Figure 10 As shown, the concave portion 110 on the rear foot side has a generally trapezoidal shape. In this case, the vertex region 112 has a rectangular shape, and the side surface of the concave portion 110 on the rear foot side is formed by a curved surface. That is, in the AA and DD cross sections, the concave portion 110 on the rear foot side is formed by a combination of straight lines and curves, thereby expanding the vertex region. Figure 11As shown, the concave portion 120 on the rear foot side has a triangular shape. In this case, the apex region of the concave portion 120 on the rear foot side is curved, and the side is formed by straight lines. With this structure, the same effect as the sole based on the embodiment can also be expected.

[0077] In the described embodiment, to improve design flexibility, the shoe 10 is shown to have a shape without a flat surface. However, curves L1 to L5 do not necessarily need to be differentiable curves; they can also be shapes with vertices that combine straight lines.

[0078] [Industry availability]

[0079] This invention has industrial applicability in the field of shoes and shoe sole structures.

Claims

1. A sole structure, for use as the sole structure of a shoe, wherein, The sole has a concave shape with a apex area on the rear foot side. The vertex region is positioned at the highest point within the sole surface of the shoe in the heel area, and is located at a position corresponding to the center of the wearer's heel, so that the wearer's center of pressure overlaps with the center of the heel. in, A first, downward-protruding ridge is provided between the rear foot area of ​​the bottom surface and the midfoot area of ​​the bottom surface of the sole. The sole is adjacent to the toe side of the first raised portion and has a thin-walled portion. The sole has a rolled-up portion that extends upwards along the periphery of the sole. The height of the rolled-up portion at the position corresponding to the thin-walled portion is higher than the height of the rolled-up portion in other parts.

2. The sole structure according to claim 1, wherein, The bottom surface of the sole has a shape in which the height of the bottom surface gradually increases from the width direction and the front-back direction toward the vertex region.

3. The sole structure according to claim 1 or 2, wherein, The sole has a second and a third raised portion protruding downwards on both sides of the foot area in the width direction.

4. The sole structure according to claim 3, wherein, A concave shape on the front foot side is formed between the second raised portion and the third raised portion in the foot area of ​​the bottom surface, with the height gradually increasing from the front-to-back direction.

5. The sole structure according to claim 1, wherein, The sole has a second and a third raised portion protruding downwards on both sides of the foot area on the bottom surface. On the inner or outer side of the sole, a plurality of convex shapes, including the second and third raised portions, are formed along the inner or outer side from near the toe to near the heel. At the center of the bottom surface of the sole, extending from near the toe to near the heel, a plurality of convex shapes including the first raised portion are formed. The number of convex shapes located at the center of the bottom surface of the sole is greater than the number of convex shapes located on the inner or outer side of the bottom surface of the sole.

6. A sole structure, for use as the sole structure of a shoe, wherein, The sole has a concave shape with a apex area on the heel side, and... The fourth raised portion is configured to surround the entire circumference of the concave shape on the rear foot side and protrudes downward. The vertex region is located at the highest point within the sole surface of the shoe in the rear foot region, and is positioned approximately at the center of the wearer's heel. in, A first, downward-protruding ridge is provided between the rear foot area of ​​the bottom surface and the midfoot area of ​​the bottom surface of the sole. The sole is adjacent to the toe side of the first raised portion and has a thin-walled portion. The sole has a rolled-up portion that extends upwards along the periphery of the sole. The height of the rolled-up portion at the position corresponding to the thin-walled portion is higher than the height of the rolled-up portion in other parts.

7. The sole structure according to claim 6, wherein, The fourth raised portion and the concave shape portion on the rear foot side are continuous in such a way that they form curves with inflection points, respectively, through the bottom edge of the width direction section corresponding to the center of the heel and the bottom edge of the front-rear direction section corresponding to the center of the heel.

8. The sole structure according to claim 7, wherein, The heel side of the fourth bulge has a curved shape.

9. A shoe, comprising: The upper of the shoe shelters the wearer's feet; as well as The sole is fitted with the aforementioned upper. The sole has the sole structure as described in any one of claims 1 to 8.

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