Sole Structure and Shoes

Abstract

Provided is a sole structure that enables a wearer to stably maintain an upright posture.　This sole structure for a shoe has a foot-rear side recess shaped section 28, having a apex region 32, formed in a bottom surface foot-rear region of a sole 14. The apex region 32 is positioned at the highest position of the bottom surface of the sole 14 in the bottom surface foot-rear region, and is positioned at a position corresponding to the middle of the wearer's heel such that the wearer's center of pressure overlaps the center of the heel. Through this configuration, the wearer can stably maintain an upright posture.

Description

[Technical field]

[0001] The present invention relates to a sole structure and a shoe. [Background technology]

[0002] Conventionally, various sole structures have been proposed to improve the fit of shoes for the wearer (for example, Patent Documents 1 and 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-162357 A [Patent Document 2] International Publication No. 2010 / 038266 Summary of the Invention [Problem to be solved by the invention]

[0004] When a wearer works while standing or sings, the wearer needs to maintain an upright posture in order to fully exercise his / her abilities. In order for the wearer to stably maintain an upright posture, it is desirable for the center of the wearer's heel to overlap with the center of pressure (COP) of the wearer. However, there is no sole structure developed from this perspective.

[0005] An object of the present invention is to provide a sole structure that enables a wearer to stably maintain an upright posture. [Means for solving the problem]

[0006] In order to solve the above problems, one aspect of the present invention is a sole structure for a shoe, in which a rear foot side concave portion having an apex region is formed in the rear foot region of the bottom surface of the sole, and the apex region is positioned at the highest position within the bottom surface of the sole in the rear foot region of the bottom surface, and is positioned 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. [Brief description of the drawings]

[0007] [Figure 1] FIG. 2 is a top view showing the skeleton of the foot. [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] FIG. 4 is a cross-sectional view taken along the line AA in FIG. [Diagram 5] FIG. 4 is a cross-sectional view taken along line BB in FIG. [Figure 6] FIG. 4 is a cross-sectional view taken along line CC of FIG. [Figure 7] FIG. 4 is a cross-sectional view taken along line DD of FIG. [Figure 8] FIG. 2 is a side view of the medial side of the sole. [Figure 9] 13 is a cross-sectional view taken along the line AA of a sole according to a modified example. FIG. [Figure 10] 13 is a cross-sectional view taken along the line AA of a sole according to a modified example. FIG. [Figure 11] 13 is a cross-sectional view taken along the line AA of a sole according to a modified example. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] First, the definitions of terms used in this specification will be explained. In this specification, the terms "front-rear direction", "width direction", and "up-down direction" may be used as terms indicating directions, and these terms indicate directions seen from the viewpoint of a wearer who places the shoe on a flat surface and wears the shoe. Therefore, the front direction means the toe side, and the rear direction means the heel side. In addition, the terms "inner foot side" and "outer foot side" may be used as terms indicating directions, and the inner foot side means the inner side in the width direction of the foot, i.e., the side of the big toe (first toe) of the foot, and the outer foot side means the opposite side to the inner foot side in the width direction.

[0009] In the following description, directions may be explained using three-dimensional Cartesian coordinates. In this case, the X-axis extends from the inner side of the foot to the outer side of the foot, the Y-axis extends from the heel side to the toe side, and the Z-axis extends from the bottom side to the top.

[0010] Furthermore, before describing the shoes according to the embodiments, the anatomy of the foot that may be related to the shoes according to the embodiments will be described with reference to FIG.

[0011] FIG. 1 is a top view showing the skeleton of the foot. The human foot is mainly composed of the cuneiform bone Ba, cuboid bone Bd, navicular bone Bc, talus Bb, calcaneus Be, metatarsal bone Bf, and phalanges Bg. The joints of the foot include the 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 talonavicular joint Jc2 formed by the navicular bone Bc and the talus Bb. In this specification, the "forefoot" of the wearer refers to the part forward of the MP joint Ja, and when replaced with the length ratio of the shoe, refers to 0 to about 30% of the total length of the shoe measured from the toe side. The "forefoot region" of the bottom surface of the sole refers to the area of ​​the sole that overlaps with the forefoot when viewed from above. The "midfoot" refers to the area from the MP joint Ja to the Chopart joint Jc, and similarly refers to about 30-80% of the total length of the shoe measured from the toe side. The "midfoot region" of the bottom surface of the sole refers to the area of ​​the sole that overlaps with the midfoot when viewed from above. The "rear foot" refers to the area behind the Chopart joint Jc, and similarly refers to about 80-100% of the total length of the shoe measured from the toe side. The "rear foot region" of the bottom surface of the sole refers to the area of ​​the sole that overlaps with the forefoot when viewed from above. In addition, in FIG. 1, the center line S indicates the center line of the shoe and extends along the center in the foot width direction. The center line S is assumed to be located on a straight line passing through the third metatarsal bone Bf3 of the human body and the medial calcaneal eminence Be1 of the calcaneus Be. FIG. 1 shows the range in which the medial calcaneal eminence Be1 is assumed to be located. The area where the medial calcaneal protuberance Be1 is located overlaps with the center of the wearer's heel when stationary. The ratio of the total length of the shoe is a guideline and does not limit the areas of the forefoot, midfoot, and rearfoot.

[0012] Fig. 2 is a perspective view of a shoe. As shown in Fig. 2, a shoe 10 includes an upper 12 and a sole 14. The upper 12 has a shape that encases the instep of the wearer's foot.

[0013] The upper 12 is joined to the sole 14 along the outer periphery of the sole 14. Various types of uppers 12 can be used, such as lace-up shoes in which the fit of the upper can be adjusted by laces, slip-ons that do not have fastening means such as laces, and monosocks.

[0014] The sole 14 includes one or both of a midsole and an outsole. Therefore, in the following description of the shape of the sole, unless otherwise specified, the term "sole" includes the midsole and the outsole, and refers to the entire sole 14 including both as a single body. The sole 14 plays a role in absorbing shock, and is formed in part or in whole from a soft material that absorbs shock, including foamed EVA, foamed urethane, foamed thermoplastic elastomer, GEL, or cork. The material forming the midsole 16 preferably has a Young's modulus of 10 MPa or less (at 10% strain) or a measured value of 70 or less using an Asker rubber hardness tester type C.

[0015] Fig. 3 is a bottom view of the sole. Fig. 4 is a cross-sectional view taken along line AA in Fig. 3, Fig. 5 is a cross-sectional view taken along line BB in Fig. 3, Fig. 6 is a cross-sectional view taken along line CC in Fig. 3, and Fig. 7 is a cross-sectional view taken along line DD in Fig. 3.

[0016] The bottom surface of 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 rearfoot region 24 corresponding to the rearfoot of the wearer's foot. The forefoot region 20, the midfoot region 22, and the rearfoot region 24 are arranged continuously from the toe to the heel. The bottom surface of the sole 14 has a highly designed shape with unevenness all over and no or almost no flat surfaces.

[0017] 3, 4, and 7, the rearfoot region 24 is formed with a pair of raised portions (hereinafter referred to as "rearfoot raised portions") 26 arranged on both sides in the width direction and extending along the Y axis, and a rearfoot side concave portion 28 provided between the pair of rearfoot raised portions 26. The pair of rearfoot raised portions 26 and the rearfoot side concave portion 28 are aligned in a row in the width direction.

[0018] The rearfoot side concave portion 28 is a space having a crater shape or a truncated cone shape recessed upward. The rearfoot side concave portion 28 is formed by an inclined slope 30 and a substantially flat apex region 32. The apex region 32 has a circular shape and is positioned at a position corresponding to the center of the heel of the wearer. The apex region 32 is located at the highest position (position on the +Z side) in the rearfoot region 24. That is, in the rearfoot region 24, the bottom surface of the sole 14 does not exist at a position higher than the apex region 32. This means that the apex region 32 is the thinnest part of the sole 14 in the rearfoot region 24. The slope 30 surrounds the entire circumference of the apex region 32. The slope 30 gradually increases in height toward the apex region 32. That is, the bottom surface of the sole 14 has a shape that rises toward the apex region 32 from all directions including the front-rear direction and the width direction in the rearfoot region 24. The rearfoot side concave portion 28 can also be considered to have a dome shape in the AA cross section and the DD cross section. By adopting such a shape, the dome shape is slightly crushed when the weight of the wearer is applied to the center of the heel in the vertex region 32. This makes it easier for the center of gravity of the wearer to gather in the vertex region 32, and the COP of the wearer overlaps with the vertex region 32. This allows the wearer to maintain a stable standing posture.

[0019] The rearfoot protuberances 26 are disposed at both widthwise ends of the rearfoot region 24 and extend along the edges of the rearfoot region 24. The rearfoot protuberances 26 have a shape that is convex downward relative to the rearfoot-side concave portion 28. Conversely, it can be said that the rearfoot-side concave portion 28 has a shape that is convex upward relative to the rearfoot protuberances 26. The top surface (the end surface on the -Z side) of the rearfoot protuberances 26 is a surface that contacts the imaginary plane H in the rearfoot region 24 when the shoe 10 is placed on the imaginary plane H without applying any load to the shoe 10. The widthwise inner side of the rearfoot protuberances 26 is determined by the slope 30 of the rearfoot-side concave portion 28. In other words, the rearfoot protuberances 26 and the rearfoot-side concave portion 28 are continuous. The bottom surface of the shoe 10 has an inflection point and describes a differentiable curve L1 in the AA cross section.

[0020] A boundary protuberance 34 (corresponding to a "first protuberance") extending along the X-axis is formed on the toe side of the rearfoot side concave portion 28. The boundary protuberance 34 is formed at the boundary between the midfoot region 22 and the rearfoot region 24, and extends across the bottom surface of the sole 14 in the width direction. The boundary protuberance 34 has a downwardly convex shape relative to the rearfoot side concave portion 28. Conversely, it can be said that the rearfoot side concave portion 28 has an upwardly convex shape relative to the boundary protuberance 34. The protuberance height of the boundary protuberance 34 is lower than the protuberance height of the rearfoot side concave portion 26, and the apex of the boundary protuberance 34 does not contact the virtual plane H in the unloaded state. The boundary protuberance 34 may be designed to contact the virtual plane H. The heel side of the boundary protuberance 34 is determined by the slope 30 of the rearfoot side concave portion 28. That is, the boundary raised portion 34 is continuous with the rear foot side concave portion 28. The bottom surface of the shoe 10 has an inflection point on the heel side of the boundary raised portion 34 in the DD cross section, and describes a differentiable curve L2.

[0021] A rear end protuberance 36 extending along the X-axis is formed on the heel side of the rear foot side concave portion 28. The rear end protuberance 36 extends in the width direction so as to connect the heel side ends of the rear foot side concave portion 26 in the width direction. The rear end protuberance 36 has a downwardly convex shape relative to the rear foot side concave portion 28. Conversely, it can be said that the rear foot side concave portion 28 has an upwardly convex shape relative to the rear end protuberance 36. The protuberance height of the rear end protuberance 36 is lower than that of the rear foot side concave portion 26, and the apex of the rear end protuberance 36 does not contact the imaginary plane H in the unloaded state. The rear end protuberance 36 may be designed to contact the imaginary plane H. The heel side of the rear end protuberance 36 is determined by the slope 30 of the rear foot side concave portion 28. That is, the rear end raised portion 36 is continuous with the rear foot side concave portion 28. The bottom surface of the shoe 10 has an inflection point on the toe side of the rear end raised portion 36 in the DD cross section, and describes a differentiable curve L3. The heel side surface S1 of the rear end raised portion 36 has a downwardly convex curved shape.

[0022] The pair of rear foot raised portions 26, the boundary raised portion 34, and the rear end raised portion 36 cooperate to form one raised portion (corresponding to the fourth raised portion) that surrounds the entire circumference of the rear foot side concave portion 28. By surrounding the entire circumference of the rear foot side concave portion 28 in this manner, the center of gravity of the wearer tends to converge toward the apex region 32 from all directions of the apex region 32.

[0023] 3, 5, and 7, the midfoot region 22 has an upwardly concave shape in the BB and DD cross sections. A thin-walled portion 38, where the sole 14 is thin, is formed near the center of the midfoot region 22 in the front-to-back and width directions. The heel side of the thin-walled portion 38 is determined by the inclination of the toe side of the boundary ridge 34. In other words, the boundary ridge 34 and the bottom surface of the thin-walled portion 38 form a continuous curve L4 in the DD cross section.

[0024] 3, 6, and 7, a pair of midfoot protuberances 40 are formed in the midfoot region 22 on the toe side of the thin-walled portion 38. The pair of midfoot protuberances 40 are disposed at both ends of the midfoot region 22 in the width direction and extend in the Y-axis direction along the edge of the midfoot region 22. A midfoot-side concave portion 42 is formed between the midfoot protuberances 40.

[0025] The midfoot side concave portion 42 is a space having a crater shape or a truncated cone shape recessed upward. The midfoot side concave portion 42 is formed by an inclined slope 44 and a substantially flat apex region 46. A pair of intermediate protuberances 48 are formed on the toe side and heel side of the midfoot side concave portion 42. Therefore, the midfoot side concave portion 42 is entirely surrounded by the pair of midfoot protuberances 40 and the pair of intermediate protuberances 48.

[0026] The pair of midfoot protuberances 40 (corresponding to the second protuberance and the third protuberance) have a downwardly convex shape relative to the midfoot side concave portion 42. Conversely, it can be said that the midfoot side concave portion 42 has an upwardly convex shape relative to the midfoot protuberance 40. The top surface (the end surface on the -Z side) of the midfoot protuberance 40 is the only surface in the midfoot region 22 that contacts the imaginary plane H when the shoe 10 is placed on the imaginary plane without applying any load to the shoe 10. The inner side in the width direction of the midfoot protuberance 40 is determined by the slope 44 of the midfoot side concave portion 42. In other words, the midfoot protuberance 40 and the midfoot side concave portion 42 are continuous. The bottom surface of the shoe 10 has an inflection point and describes a differentiable curve L5 in the CC cross section.

[0027] A forefoot side concave portion 50 extending in the width direction is formed in the vicinity of the boundary between the forefoot region 20 and the midfoot region 22 at a position corresponding to the wearer's MP joint Ja (see FIG. 1). The forefoot side concave portion 50 is a groove recessed upward and extending in the width direction across the forefoot region 20. The sole 14 has an upwardly curved surface S2 formed on the toe side of the forefoot side concave portion 50, and has a shape such that the bottom surface of the sole 14 is distant from the imaginary plane H.

[0028] 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 so as to surround the periphery of the sole 14, and has a shape rising 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 in the width direction of the rolled-up portion 52. The rolled-up portion 52 is formed high in the midfoot region 22 and low in the forefoot region 20 and the rearfoot region 24. The rolled-up portion 52 is highest in the midfoot region 22 at a position corresponding to the thin portion 38.

[0029] The height of the rolled-up portion 52 at the position corresponding to the thin portion 38 is preferably higher than the height of the rolled-up portion 52 in the forefoot region 20 and the rearfoot region 24 as well as the midfoot region 22. However, in a special sole such as a toe spring structure, the front or rear end of the sole may be extremely upwardly oriented, and the rolled-up portion may be made higher to accommodate this. Therefore, when the sole structure of the embodiment is applied to a sole having such a special structure, the height of the rolled-up portion 52 may be lower than the height of the rolled-up portion near the front or rear end of the sole. The vicinity of the front end of the sole here refers to a range of 0 to 10% when the front end of the sole is 0% on a scale and the rear end of the sole is 100%. The vicinity of the rear end refers to a range of 90 to 100% on the same scale.

[0030] Since the sole 14 is thin at the position corresponding to the thin portion 38, the rigidity is lower than other portions where the sole 14 is thick. Therefore, by increasing the height of the position corresponding to the thin portion 38 and the rolled-up portions 52 before and after it, the rigidity in the vicinity of the thin portion 38 can be ensured.

[0031] FIG. 8 is a side view of the sole on the inner foot side. As shown in FIG. 8, when the sole 14 is viewed from the inner foot side, the bottom surface of the sole 14 has a wavy shape concave upward at the positions of the surface S2, the forefoot side concave portion 50, the thin portion 38, and the heel side surface S1. The shape of the wavy shape is the same when viewed from the outer foot side. On the other hand, as shown in FIG. 7, in the DD cross section of the sole 14, the bottom surface of the sole 14 has a wavy shape concave upward at the positions of the surface S2, the forefoot side concave portion 50, the midfoot side concave portion 42, the thin portion 38, the rear foot side concave portion 28, and the heel side surface 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. Since there is a correlation between the number of upward concave shapes and the number of downward convex shapes, the same can be said about the number of downward convex shapes when the sole 14 is viewed from the inner foot side and the number of downward convex shapes in the DD cross section. The reason why the numbers of recesses are different is because the midfoot side recessed portion 42 and the rearfoot side recessed portion 28 are sandwiched between the midfoot protuberance 40 and the rearfoot protuberance 26, respectively, and cannot be seen from the side. Such a sole 14 has a very high designability.

[0032] Next, the operation of the shoe 10 will be described.

[0033] When a wearer puts on the shoe 10 and takes a standing posture, in the rearfoot region 24, the rearfoot protuberance 26 falls inward in the width direction, and the rearfoot side concave portion 28 sinks downward. As a result, the wearer's COP moves toward the apex region 32. At this time, in the midfoot region 22, the wearer is supported by the midfoot protuberance 40. In other words, the rearfoot side of the wearer is stably supported by the rearfoot side concave portion 28, and the midfoot side and forefoot side are supported by the pair of midfoot protuberances 40, so that there are three support points on the bottom surface of the sole 14.

[0034] When the wearer runs, twisting or bending around the Y axis may occur in the sole 14, but the rolled-up portion 52 near the thin-walled portion 38 exhibits resistance to the twisting deformation and bending. When the wearer lands while running, the foot rolls forward because the wearer can land on the side surface S1 of the heel.

[0035] When the wearer jumps and lands, the crater shape of the rear foot side concave portion 28 cushions the impact at the time of landing.

[0036] As described above, according to the embodiment, the wearer can easily maintain a standing posture by concentrating the center of gravity on the rear foot side concave portion 28. This makes it easier for the wearer to perform an action that requires a stable standing posture, such as singing. The effect of maintaining a standing posture is further enhanced by the pair of midfoot protuberances 40. In addition, the support form similar to three-point support by the rear foot side concave portion 28 and the midfoot protuberances 40 makes it easier for the wearer to maintain a standing posture.

[0037] In addition, by adjusting the height of the rolled-up portion 52 and making the rolled-up portion 52 higher near the thin-walled portion 38, it is possible to ensure the rigidity of the thin-walled portion 38. In addition, since the heel side surface S1 of the sole 14 has a downwardly convex curved shape, the synergistic effect of the rigidity of the thin-walled portion 38 and the curved shape makes it easier for the wearer to shift their center of gravity and to perform running movements.

[0038] Moreover, by forming the rear foot side concave portion 28 in a crater shape, the rear foot side concave portion 28 also functions as a buffer structure when the wearer jumps and lands.

[0039] Thus, the shoe and sole structure according to the embodiment are particularly suitable for shoes for entertainers who may engage in vigorous exercise such as dancing while singing.

[0040] The present invention is not limited to the above-described embodiment, and each configuration of the embodiment can be modified as appropriate. The following modifications are envisioned within the scope of the present invention.

[0041] FIG. 9 is a cross-sectional view of the AA section of the sole according to the modified example. In this figure, the cross-sectional shape of the sole shown in FIG. 4 is shown by a chain line in order to clarify the difference from the structure shown in FIG. 4. As shown in FIG. 9, the rear foot protuberance 102 on the inner side of the rear foot side concave portion 100 is wider than the rear foot protuberance 26, and the rear foot protuberance 104 on the outer side is narrower than the rear foot protuberance 26. The width of the rear foot protuberances 102, 104 is adjusted by changing the curvature of the bottom surface. In this structure, by making the rear foot protuberance 102 wider, the rear foot protuberance 102 functions as a structure that prevents overpronation. Also, by making the rear foot protuberance 104 narrower, the rear foot protuberance 104 becomes more easily deformed and functions as a buffer structure on the outer side of the foot that is more likely to receive a load.

[0042] 10 and 11 are cross-sectional views of the sole of the modified example taken along the line AA. In these figures, the cross-sectional shape of the sole shown in FIG. 4 is shown by a chain line to clarify the difference from the structure shown in FIG. 4. As shown in FIG. 10, the rearfoot side concave portion 110 has a substantially trapezoidal shape. In this case, the apex region 112 has a rectangular shape, and the side surface of the rearfoot side concave portion 110 is formed by a curved surface. That is, in the AA and DD cross sections, the rearfoot side concave portion 110 is formed by a combination of straight lines and curved lines, which allows the apex region to be expanded. As shown in FIG. 11, the rearfoot side concave portion 120 has a triangular shape. In this case, the apex region of the rearfoot side concave portion 120 is curved, and the side surface is formed by straight lines. With such a structure, the same effect as the sole according to the embodiment can be expected.

[0043] In the above embodiment, the shoe 10 does not have a flat surface in order to enhance the design. However, the curves L1 to L5 do not necessarily need to be differentiable curves, and may have a shape having vertices formed by combining straight lines. [Industrial Applicability]

[0044] The present invention has industrial applicability in the field of shoes and shoe sole structures. [Explanation of symbols]

[0045] 10: shoe, 12: upper, 14: sole, 20: forefoot region, 22: midfoot region, 24: rearfoot region, 28: rearfoot concave portion, 32: apex region, 34: boundary protuberance, 38: thin portion 40: midfoot protuberance, 52: roll-up portion, 100: hindfoot concave portion, 102: hindfoot protuberance, 104: hindfoot protuberance, 110: hindfoot concave portion, 112: apex region, 120: hindfoot concave portion

Claims

1. A shoe sole structure, comprising: A rear foot side concave portion having an apex region is formed in a bottom rear foot region of the sole, The apex region is positioned at the highest position in the bottom surface of the sole in the bottom rear foot region, and is positioned at a position corresponding to the wearer's heel center so that the wearer's center of pressure overlaps with the heel center; A first protuberance is provided between the rear foot region of the bottom surface and the midfoot region of the bottom surface of the sole, the first protuberance protruding downwardly; The sole has a thin portion adjacent to a toe side of the first raised portion, The sole has a roll-up portion that is provided along a periphery of the sole and stands upward, A sole structure in which the height of the rolled-up portion in the vicinity of the thin portion is greater than the height of the rolled-up portion in other portions.

2. A shoe sole structure, comprising: A rear foot side concave portion having an apex region is formed in a bottom rear foot region of the sole, The apex region is positioned at the highest position in the bottom surface of the sole in the bottom rear foot region, and is positioned at a position corresponding to the wearer's heel center so that the wearer's center of pressure overlaps with the heel center; A first protuberance is provided between the rear foot region of the bottom surface and the midfoot region of the bottom surface of the sole, the first protuberance protruding downwardly; A second protuberance and a third protuberance protruding downward are provided on both sides in the width direction of the bottom surface of the forefoot region of the sole, a plurality of convex shapes including the second raised portion and the third raised portion are formed along the medial side end or the lateral side end of the bottom surface of the sole from the vicinity of the toe to the vicinity of the heel, A plurality of convex shapes including the first protrusion are formed on the bottom surface of the sole at a position along the width direction center from the vicinity of the toe to the vicinity of the heel, A sole structure, wherein the number of convex shapes provided along a widthwise center of the bottom surface of the sole is greater than the number of convex shapes provided at an inner foot side end or an outer foot side end of the bottom surface of the sole.

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

4. The sole structure according to claim 1 , wherein a second protuberance and a third protuberance protruding downward are provided on both sides in a width direction of the midfoot region of the bottom surface of the sole.

5. The sole structure according to claim 4 , wherein a forefoot side concave portion whose height gradually increases in the front-to-rear direction is formed between the second raised portion and the third raised portion in the bottom midfoot region.

6. A shoe sole structure, comprising: The sole has a bottom rear foot region, a rear foot side concave portion having an apex region, a fourth protruding portion that is disposed so as to surround the entire periphery of the rear foot side concave portion and that protrudes downward is formed; The apex region is positioned at the highest position within the bottom surface of the sole in the bottom rear foot region and is positioned at a position corresponding to the center of the heel of the wearer; The fourth raised portion includes a first raised portion that protrudes downward between the bottom rear foot region and the bottom midfoot region of the sole, The sole has a thin portion adjacent to a toe side of the first raised portion, The sole has a roll-up portion that is provided along a periphery of the sole and stands upward, A sole structure in which the height of the rolled-up portion in the vicinity of the thin portion is greater than the height of the rolled-up portion in other portions.

7. A shoe sole structure, comprising: The sole has a bottom rear foot region, a rear foot side concave portion having an apex region, a fourth protruding portion that is disposed so as to surround the entire periphery of the rear foot side concave portion and that protrudes downward is formed; The apex region is positioned at the highest position within the bottom surface of the sole in the bottom rear foot region and is positioned at a position corresponding to the center of the heel of the wearer; The fourth raised portion includes a first raised portion that protrudes downward between the bottom rear foot region and the bottom midfoot region of the sole, A second protuberance and a third protuberance protruding downward are provided on both sides in the width direction of the bottom surface of the forefoot region of the sole, a plurality of convex shapes including the second raised portion and the third raised portion are formed along the medial side end or the lateral side end of the bottom surface of the sole from the vicinity of the toe to the vicinity of the heel, A plurality of convex shapes including the first protrusion are formed on the bottom surface of the sole at a position along the width direction center from the vicinity of the toe to the vicinity of the heel, A sole structure, wherein the number of convex shapes provided along a widthwise center of the bottom surface of the sole is greater than the number of convex shapes provided at an inner foot side end or an outer foot side end of the bottom surface of the sole.

8. 8. The sole structure according to claim 6, wherein the fourth raised portion and the rear foot side concave portion are continuous such that a bottom edge of a widthwise cross section passing through a position corresponding to the heel center and a bottom edge of a front-to-rear cross section passing through a position corresponding to the heel center each form a curve having an inflection point.

9. The sole structure of claim 8 , wherein a heel side of the fourth ridge has a curved shape.

10. an upper that accommodates a wearer's foot; a sole to which the upper is attached; A shoe, the sole having the sole structure according to claim 1 .

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