Classifications

• • A—HUMAN NECESSITIES
  • A43—FOOTWEAR
  • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
  • A43B13/00—Soles; Sole-and-heel integral units
  • A43B13/14—Soles; Sole-and-heel integral units characterised by the constructive form
  • A43B13/18—Resilient soles
• • A—HUMAN NECESSITIES
  • A43—FOOTWEAR
  • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
  • A43B13/00—Soles; Sole-and-heel integral units
  • A43B13/02—Soles; Sole-and-heel integral units characterised by the material
  • A43B13/12—Soles with several layers of different materials
  • A43B13/125—Soles with several layers of different materials characterised by the midsole or middle layer
• • A—HUMAN NECESSITIES
  • A43—FOOTWEAR
  • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
  • A43B13/00—Soles; Sole-and-heel integral units
  • A43B13/14—Soles; Sole-and-heel integral units characterised by the constructive form
  • A43B13/18—Resilient soles
  • A43B13/181—Resiliency achieved by the structure of the sole
• • A—HUMAN NECESSITIES
  • A43—FOOTWEAR
  • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
  • A43B7/00—Footwear with health or hygienic arrangements
  • A43B7/14—Footwear with health or hygienic arrangements with foot-supporting parts
  • A43B7/1405—Footwear with health or hygienic arrangements with foot-supporting parts with pads or holes on one or more locations, or having an anatomical or curved form
  • A43B7/1415—Footwear with health or hygienic arrangements with foot-supporting parts with pads or holes on one or more locations, or having an anatomical or curved form characterised by the location under the foot
  • A43B7/144—Footwear with health or hygienic arrangements with foot-supporting parts with pads or holes on one or more locations, or having an anatomical or curved form characterised by the location under the foot situated under the heel, i.e. the calcaneus bone
• • A—HUMAN NECESSITIES
  • A43—FOOTWEAR
  • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
  • A43B7/00—Footwear with health or hygienic arrangements
  • A43B7/14—Footwear with health or hygienic arrangements with foot-supporting parts
  • A43B7/24—Insertions or other supports preventing the foot canting to one side , preventing supination or pronation

Definitions

• Patent Literature 1 Japanese Patent No. 5157020
• Patent Literature 1 Although the shoe described in Patent Literature 1 includes hard embedded portions in the midsole and hence has high stability, some users may be annoyed with a feeling of being pushed up, depending on the users' preferences. Therefore, there is a need for improving the stability by means other than those described in Patent Literature 1.
• the present invention has been made to solve the problem above, and a purpose thereof is to provide a shoe with further improved stability.
• front and rear directions (longitudinal directions), width directions, and vertical directions may be used as terms indicating directions. These terms indicate directions viewed from a viewpoint of a wearer wearing a shoe placed on a flat surface. Accordingly, the front direction means a direction toward the toe side, and the rear direction means a direction toward the heel side. Also, a medial side and a lateral side of a foot may also be used as terms indicating directions.
• the medial side of a foot means the inner side of the foot in a width direction, i.e., a longitudinal arch side of the foot, and the lateral side of the foot means the side opposite to the medial side along a width direction.
• outer edges of the midsole and the outsole of a shoe may be referred to.
• the outer edge of the midsole or the outsole means an outer edge of a projected shape of the midsole or the outsole viewed from the top.
• the outside (direction) or the inside (direction) of the midsole may be referred to.
• the outside of the midsole means, when viewed from the top, every direction away from a surface of the midsole.
• the inside of the midsole means, when viewed from the top, every direction from the outside of the midsole toward the inside of a surface of the midsole.
• directions may be described using a three-dimensional Cartesian coordinate system. In this case, the X-axis extends from the medial side toward the lateral side of the foot, the Y-axis extends from the heel side toward the toe side, and the Z-axis extends from the bottom surface side toward the upper side.
• FIG. 2 is a side view of a shoe.
• FIG. 2 is a side view of one shoe viewed from the medial side.
• a shoe 1 includes an upper 2 that mainly covers an instep, a midsole 4 to which the upper 2 is joined, and an outsole 6 including a ground contact surface that comes into contact with the ground during walking.
• the upper 2 has a shape that covers a top side of an instep.
• the upper 2 includes an upper body 2a, a tightening means (tightening structure) 2b for the upper, and a slit 2c that extends along a longitudinal direction of the upper 2 around the middle in a width direction of the upper 2.
• a shoe tongue 2d is attached to the upper 2.
• the tightening means 2b a structure constituted by a combination of grommets and a shoelace is employed.
• a hook-and-loop fastener or the like may also be used.
• the upper body 2a may be made of a mesh material obtained by knitting synthetic fiber, such as polyester and polyurethane, or made of synthetic leather or natural leather, for example, and has a shape covering an instep.
• the slit 2c is a buffer portion provided to adjust the width of the upper body 2a by adjusting the degree of tightening of the shoelace. On each side in a width direction of the slit 2c, multiple grommets are provided.
• the shoe tongue 2d is exposed through the slit, and, when a shoelace is tied, the shoelace has no contact with the wearer's instep.
• the outsole 6 is formed such that multiple insular portions thereof are pasted onto predetermined positions on the bottom surface of a predetermined midsole.
• the ground contact surface is formed by the bottom surfaces of the multiple insular portions, and the bottom surface of the midsole 4 is exposed between the insular portions. Accordingly, the ground contact surface in the illustrated example does not form a continuous surface and is formed by multiple surfaces.
• the outsole 6 may be formed by one flat sheet member. In this case, the bottom surface of the sheet member forms the ground contact surface.
• FIGS. 4-6 are sectional views of the shoe. More specifically, FIG. 4 is a sectional view taken along line 4-4 in FIG. 2 , FIG. 5 is a sectional view taken along line 5-5 in FIG. 2 , and FIG. 6 is a sectional view taken along line 6-6 in FIG. 2 .
• FIGS. 4-6 shows a cross section around the rearfoot portion viewed from the heel side toward the toe side.
• FIGS. 7 and 8 are schematic sectional views of the midsole viewed from the heel side toward the toe side.
• the midsole 4 includes a bulging part 8 that bulges outward.
• the bulging part 8 may be made by forming a side surface of the midsole 4 into a flare shape that extends outward from the top side toward the lower side, for example. With the bulging part 8 provided, so-called overpronation can be restrained. To maximally restrain the overpronation, the bulging part 8 may be suitably provided at least or only in a portion corresponding to the medial side of the rearfoot portion. Such a bulging part 8 may be formed of the same material as a portion other than the bulging part 8 in the midsole 4 and may have the same hardness as the portion other than the bulging part 8 in the midsole 4.
• the bulging part 8 may be formed of a material different from that of the portion other than the bulging part 8 in the midsole 4 and may have hardness different from that of the portion other than the bulging part 8.
• the relation H1>H2 can be made to hold.
• the feeling of being pushed up can be reduced while the stability can be improved.
• the midsole 4 is formed by two-color molding such that the bulging part 8 and the portion other than the bulging part 8 are integrally formed.
• the bulging part 8 and the midsole 4 may be formed separately and then joined together.
• the bulging part 8 in top view has a shape such that, on the basis of a joint part 10 between the upper 2 and the midsole 4, an outer edge 12 of the bottom surface of the midsole 4 is positioned on the outside of the joint part 10.
• the bulging part 8 is provided only in a portion corresponding to the medial side of the rearfoot portion.
• the bulging part 8 may be provided only in the medial side of the rearfoot portion and the medial side of the forefoot portion.
• the bulging part 8 may be provided only in the medial side of the rearfoot portion, the medial side of the forefoot portion, and the lateral side of the forefoot portion.
• the bulging part 8 may be provided in all the portions other than a portion corresponding to a landing region near the heel part, which will be described later.
• the joint part 10 between the midsole 4 and the upper 2, which serves as a basis for judging whether or not the bulging part 8 is provided, may be different depending on the method of joint between the midsole 4 and the upper 2. More specifically, when the midsole 4 and the upper 2 are sewn together, the midsole 4 and the upper 2 are in surface contact with each other, so that the joint part 10 has a certain width. In this case, on the basis of the contact point between the midsole 4 and the upper 2, when the outer edge 12 of the bottom surface of the midsole 4 is positioned on the outside of the contact point between the midsole 4 and the upper 2, the midsole 4 includes the bulging part 8.
• the top surface of the midsole 4 (the surface to which the upper 2 is joined) can be considered to have an almost flat shape even though it has some asperities.
• the upper 2 has a curved shape such as to wrap an instep, as illustrated in FIGS. 4-6 . Accordingly, on each of the cross sections shown in FIGS. 4-6 , there is a contact point at which the midsole 4 of flat shape is in contact with the upper 2 of curved shape.
• the bulging part 8 can be provided in the midsole 4.
• the height of the bulging part 8 may be the same as the height of the midsole 4 (see FIGS. 7 ) or may be lower than the midsole 4 (see FIG. 8 ).
• FIGS. 7 and 8 schematically illustrates a cross section of the midsole in the interest of clarity, and the angle of each inclined surface is particularly overdrawn.
• the bulging part 8 has a shape obtained by combining, on the X-Z cross section, a horizontal plane extending along the X-Y plane from the joint part 10 between the midsole 4 and the upper 2 toward the outside of the midsole 4 in a horizontal direction, and a vertical plane extending along the Y-Z plane from an end of the horizontal plane toward the bottom surface of the midsole 4 in an almost vertical direction, as illustrated in FIG. 7A , for example.
• the bulging part 8 may have a shape formed by a vertical plane extending along the Y-Z plane from the joint part 10 between the midsole 4 and the upper toward the bottom surface of the midsole 4.
• the vertical plane may be inclined by about ⁇ 3 degrees with respect to a vertical direction.
• the bulging part 8 has a shape obtained by combining, on the X-Z cross section perpendicular to the bulging direction of the bulging part 8 (the direction toward the medial side), a vertical plane extending along the Y-Z plane from a midway in a height direction of the midsole 4 toward the bottom surface of the midsole 4 in an almost vertical direction.
• the bulging part 8 When the height of the bulging part 8 is lower than the midsole 4, the bulging part 8 has a shape that bulges from an arbitrary position in a height direction of the midsole 4 toward the outside of the midsole 4.
• an upper end of the bulging part 8 is positioned midway along a height direction of the midsole 4, and the bulging part 8 has a shape that extends outward of the midsole 4 from the upper end of the bulging part 8 toward the bottom surface of the midsole 4.
• the upper end of the bulging part 8 is provided around the middle in a height direction of the midsole 4.
• FIG. 9 is a side view of the shoe.
• FIG. 9 is a side view of the shoe viewed from the medial side, and the portion where the bulging part is provided is indicated by hatching.
• the bulging part 8 continuously extends in a longitudinal direction from a midway in the midfoot portion to the rearfoot portion.
• the rear end of the bulging part 8 is positioned midway along the rearfoot portion and set not to overlap with the landing region described later.
• the height of the bulging part 8 becomes lower toward the front side.
• the upside of the bulging part 8 is inclined to be away from the upper end of the midsole 4 toward the front side.
• the height of the bulging part 8 may be changed depending on the region.
• the height of the bulging part may be made higher in the rearfoot portion, where the stability is particularly required, and may be made lower toward the front side.
• the bulging part 8 may have a discontinuous shape, such as a shape extending intermittently in a longitudinal direction.
• the outer edge 12 of the midsole 4 may coincide with an outer edge 14 of the outsole 6 having the ground contact surface, when viewed from the top.
• the outer edge 14 of the outsole 6 coinciding with the outer edge 12 of the midsole 4 has at least two patterns as described below.
• the outer edge 14 of the outsole 6 coincides with the outer edge 12 of the midsole 4 when viewed from the top.
• FIG. 10 is a top view of the outsole 6 and the midsole 4.
• the outer edges 14 of the outsole 6 is indicated by dashed dotted lines
• the outer edge 12 of the midsole 4 is indicated by a dashed double-dotted line
• a portion in which the outer edges 12 and 14 of the outsole 6 and the midsole 4 coincide with each other is indicated by a solid line.
• only part of the outer edge 14 positioned on the outer side of an insular portion of the outsole 6 coincides with part of the outer edge 12 of the midsole 4.
• a bulge length L1 (L1>0) in a horizontal direction of the bulging part 8 is longer than a horizontal length L2 (L2 ⁇ 0) from the joint part 10 between the upper 2 and the midsole 4 to the outer edge 12 of the midsole 4 in a portion where the bulging part 8 is not provided.
• L2 horizontal length
• FIG. 11 is a top view of the midsole.
• the bulge length L1 of the bulging part 8 is a horizontal distance from the joint part 10 between the upper 2 and the midsole 4 to the outer edge 14 of the ground contact surface.
• the bulge length L1 of the bulging part 8 is a distance from the joint part 10 between the upper 2 and the midsole 4 to the outer edge 12 of the midsole 4.
• the horizontal length L2 in a portion where the bulging part 8 is not provided is a horizontal distance from the joint part 10 between the upper 2 and the midsole 4 to the outer edge 12 of the midsole 4.
• the horizontal length L2 may be measured in an arbitrary portion where the bulging part 8 is not provided.
• the bulge length L1 and the horizontal length L2 may change depending on the shape of the midsole 4 and the shape of the joint part 10. In this case, it may be suitable to measure each of the bulge length L1 and the horizontal length L2 at a position where the horizontal distance is largest and then compare the bulge length L1 and the horizontal length L2.
• a horizontal length L3 (L3 ⁇ 0) on the lateral side is a horizontal distance on the lateral side from the joint part 10 between the upper 2 and the midsole 4 to the outer edge 14 of the ground contact surface.
• the bulge length L1 and the horizontal lengths L2 and L3 have only to be measured on the same basis.
• the bulge length L1 and the horizontal lengths L2 and L3 may be measured along the Y-Z plane at a position on the outer edge 12 of the midsole 4.
• the bulge length L1 and the horizontal lengths L2 and L3 may be measured along the Y-Z plane at a position on the joint part 10.
• an arbitrary point may be set at a position along the center line S in the rearfoot portion, for example, and a line may be drawn from the arbitrary point toward the outer edge of the midsole; along the line, the bulge length L1 and the horizontal lengths L2 and L3 may be measured.
• the bulge length L1 of the bulging part 8 is longer than the horizontal lengths L2 and L3 from the joint part 10 between the upper 2 and the midsole 4 to the outer edge 12 of the midsole 4 in a portion where the bulging part 8 is not provided.
• each of the bulge length L1 and the horizontal length L2 may be set to a horizontal distance from the joint part 10 between the upper 2 and the midsole 4 to the outer edge 12 of the midsole 4, regardless of the position of the outer edge 14 of the ground contact surface.
• each of the bulge length L1 and the horizontal length L2 may be set to a horizontal distance from the joint part 10 between the upper 2 and the midsole 4 to the outer edge 14 of the ground contact surface, regardless of the position of the outer edge 12 of the midsole 4.
• FIG. 12 is a bottom view of the midsole and the outsole.
• the bulging part 8 is not provided in a portion corresponding to a landing region 16 near the heel part.
• the portion where the bulging part 8 is not provided may suitably be the portion corresponding to the landing region 16 near the heel part, and the horizontal length L2 may suitably be measured in the portion corresponding to the landing region 16 near the heel part.
• the horizontal length L2 may be measured at an arbitrary position on the lateral side.
• the landing region 16 near the heel part is a region in the bottom surface of the shoe 1 that comes into contact with the ground first when the heel lands, and the landing region 16 may be appropriately set depending on the use of the shoe 1, for example.
• a running shoe for example, it is known that, in a region on the rear side with respect to a virtual line VL1 that traverses in a width direction around the calcaneus as shown in FIG. 12 , the thickness of the midsole 4 is tapered toward the heel side. Accordingly, the vicinity of the heel is tilted toward the heel side with respect to a horizontal direction and/or the lateral side is tilted upward, so that an inclined surface (the landing region 16) is formed.
• the bulging part 8 is not provided in the portion corresponding to the landing region 16 and is provided in a portion other than the portion corresponding to the landing region 16. Not providing the bulging part 8 in the portion corresponding to the landing region 16 prevents the bulging part 8 from disturbing the motion of the foot coming into contact with the ground at the time of landing.
• the horizontal length L2 may suitably be measured in the portion corresponding to the landing region 16, particularly the rearmost part on the heel side.
• the virtual line that defines the landing region 16 may be set to a virtual line VL2 that slants in a longitudinal direction, instead of the virtual line VL1 described above.
• the virtual line VL2 is a slant virtual line in top view, of which the lateral side is positioned forward and the medial side is positioned rearward.
• the slant angle of the virtual line VL2 may be arbitrarily set to an angle between 0 to about 45 degrees with respect to the virtual line VL1.
• the structure for defining the landing region is not limited to the inclined bottom surface of the midsole 4.
• the landing region 16 may be defined by arrangement of multiple insular outsoles 6.
• the outsoles 6 are not formed along the virtual line VL1 or the virtual line VL2 but formed in front of or in the rear of the virtual line VL1 or the virtual line VL2.
• a line on which the bottom surface of the midsole 4 is exposed is formed (see FIG. 3 , for example).
• This line is a portion where the surface of the midsole 4 is exposed when the shoe 1 is viewed from the bottom, and the line has higher flexibility than the portions where the outsoles 6 are formed.
• the region located in the rear of the line may be defined as the landing region 16, and the bulging part 8 is not provided in the portion corresponding to the landing region 16 but may be provided in any other portion.
• the hardness of at least a portion corresponding to the rearfoot portion, particularly a portion positioned below the calcaneus when the shoe is worn is uniform.
• the hardness is made different within the midsole, a boundary between a high hardness portion and a low hardness portion certainly exists.
• the shoe according to the present embodiment can restrain the overpronation by means of the bulging part, even if the hardness of the midsole is made uniform, the overpronation can be suitably restrained.
• FIGS. 13 through 19 are sectional views of the shoe and more specifically are diagrams that each show a modification of the shape of a cross section of the bulging part.
• the bulging part 8 extends from the top surface toward the bottom surface of the midsole 4 such as to form a flare shape in which the inclination angle becomes gentle at an inflection point provided midway along a height direction of the midsole 4.
• the bulging part 8 extends from a midway in a height direction of the midsole 4 toward the medial side and then extends toward the bottom surface such as to form a flare shape.
• the bulging part 8 bulges out from a midway in a height direction of the midsole 4 toward the medial side such as to form a curved shape.
• the bulging part 8 bulges out from a low position in a height direction of the midsole 4 toward the medial side such as to form a curved shape.
• part of the midsole 4 other than the bulging part 8 is also formed of a high hardness material.
• a portion continuous with the bulging part 8 is formed of a high hardness material, and the remaining portion is formed of a low hardness material.
• the portion formed of a high hardness material is indicated by hatching in the interest of clarity.
• the bulging part 8 has the same shape as the bulging part shown in FIG. 13 . Also, in the example shown in FIG.
• the bulging part 8 is formed along the entire length in a height direction of the midsole 4.
• a high hardness material part with which the bulging part 8 have line symmetry is provided.
• the bulging part 8 is formed along the entire length in a height direction of the midsole 4 and has a shape curved toward the medial side.
• a high hardness material part with which the bulging part 8 have line symmetry is provided.
• the high hardness material part extends toward the inside of the midsole to only reach a position that hardly overlaps with the calcaneus when viewed from the top.
• the high hardness material part extends to a position that partially overlaps with the calcaneus when viewed from the top.
• the feeling of being pushed up can be restrained.
• the high hardness material part when the high hardness material part is extended toward the inside of the midsole 4, it may be suitable to extend only the lower side in a height direction and avoid the situation where only the top side in a height direction overlaps with the calcaneus. In this case, it may be more suitable to provide the high hardness material part at a position lower than the middle in a height direction, for example. Further, to suitably prevent the feeling of being pushed up occurring, it may be more suitable that the high hardness material part does not have a shape forming an angle on the top side at a position that overlaps with the calcaneus. Accordingly, the high hardness material part can restrain the feeling of being pushed up.
• the high hardness material part need not necessarily have a shape with which the bulging part 8 have line symmetry.
• the shoe according to the embodiment includes the bulging part 8 provided at a position corresponding to the medial side of the rearfoot portion, the medial side can be firmly supported at the time of landing, and the overpronation can be restrained. Accordingly, the stability can be improved. Also, since the bulging part 8 is not provided in the landing region 16, the bulging part 8 disturbing the landing motion can be prevented.
• the bulging part is provided in the midsole in the aforementioned embodiment, the bulging part is provided in the outsole in the second embodiment.
• FIG. 20 is a sectional view of a shoe.
• a shoe 20 includes a roll-up portion 24 in an outsole 22, and a bulging part 26 is formed on the roll-up portion 24.
• the roll-up portion 24 is formed by a circumferential wall extending upward from an outer edge of the outsole 22. More specifically, the roll-up portion 24 extends upward from the outer edge of the outsole 22.
• the roll-up portion 24 enhances the rigidity of the shoe 20.
• the rigidity of the shoe 20 means the flexural rigidity or torsional rigidity, for example.
• the position of the upper end of the roll-up portion 24 may be appropriately changed depending on the use of the shoe 20.
• the height of the roll-up portion 24 may be uniform or may be different depending on the position. For example, when rigidity is required on the toe side, the roll-up portion 24 may be made lower on the heel side and higher on the toe side. Also, the height of the roll-up portion 24 may be made different between the medial side and the lateral side in a width direction.
• the bulging part 26 may be made by forming a side surface of the outsole 22 into a flare shape that extends outward from the top side toward the lower side. With such a bulging part 26, so-called overpronation can be restrained. With regard to the position of the roll-up portion 24, the roll-up portion 24 may be formed over the entire circumference of the outsole 22 along the outer edge of the outsole 22 or may be formed on only part of the outsole 22 along the outer edge of the outsole 22. Also, the bulging part 26 may be formed, along the outer edge of the outsole 22, over the entire roll-up portion 24 or only part of the roll-up portion 24. The bulging part 26 may be provided only in the portion corresponding to the medial side of the rearfoot portion.
• the bulging part 26 may be provided only in the medial side of the rearfoot portion and the medial side of the forefoot portion. In yet another aspect, the bulging part 26 may be provided only in the medial side of the rearfoot portion, the medial side of the forefoot portion, and the lateral side of the forefoot portion. In a further aspect, the bulging part 26 may be provided in all the portions other than the portion corresponding to the landing region near the heel part.
• the height of the bulging part 26 may be the same as the height of the roll-up portion 24 or may be lower than the roll-up portion 24.
• the bulging part 26 has a shape obtained by combining, on the Y-Z cross section perpendicular to the bulging direction of the bulging part 26, a horizontal plane extending along the X-Y plane from the upper end of the roll-up portion 24 toward the outside of the midsole 28, and a vertical plane extending along the Y-Z plane from an end of the horizontal plane toward the bottom surface of the midsole 28.
• FIGS. 21-23 are sectional views of the shoe, which each show a modification of the bulging part.
• the bulging part 26 has a shape that bulges from an arbitrary position in a height direction of the roll-up portion 24 toward the outside of the roll-up portion 24.
• the height of the roll-up portion 24 is lower than the height of the midsole 28 and the bulging part 26 has the same height as the roll-up portion 24, as illustrated in FIG. 22 .
• the bulging part 26 has a shape obtained by combining, on the Y-Z cross section perpendicular to the bulging direction of the bulging part 26, a horizontal plane extending along the X-Y plane from the upper end of the roll-up portion 24 toward the outside of the midsole 28, and a vertical plane extending almost along the Y-Z plane from an end of the horizontal plane toward the bottom surface of the outsole 22. Also, when the height of the roll-up portion 24 is lower than the height of the midsole 28 and when the height of the bulging part 26 is lower than the height of the roll-up portion 24, as illustrated in FIG. 23 , the bulging part 26 has a shape that bulges from an arbitrary position in a height direction of the roll-up portion 24 toward the outside of the roll-up portion 24.
• the bulging part 26 since the bulging part 26 is provided, the medial side can be firmly supported at the time of landing, and the overpronation can be restrained. Accordingly, the stability can be improved. Also, since the bulging part 26 is not provided in the landing region, the bulging part 26 disturbing the landing motion can be prevented.
• An outsole including a ground contact surface, a midsole fixed onto the outsole, and an upper joined to the midsole along a circumferential edge of the midsole are described.
• the midsole include a bulging part at a position corresponding to a medial side of a rearfoot portion, and the bulging part has a bulge length L1 that is measured, in top view, as a horizontal distance from a joint part between the upper and the midsole to an outer edge of the ground contact surface.
• the bulge length L1 is longer than a horizontal length L2 from the joint part between the upper and the midsole to an outer edge of the midsole at the rearmost end.
• a midsole in which hardness of at least a portion for supporting a calcaneus is uniform is described.
• the hardness of the bulging part in the first or second aspect is higher than the hardness of a portion other than the bulging part in the midsole.
• the bulging part is formed from a joining surface of the midsole and the outsole to a midway in a height direction of the midsole.
• a side surface on the medial side of the bulging part having a shape that extends away from the joint part toward the ground contact surface is described.
• the midsole formed by two-color molding is described.
• the bulging part formed only in the medial side of the rearfoot portion is described.
• the bulging part formed in a part other than an outer circumference of a landing region near a heel part on the ground contact surface is described.
• An outsole including a ground contact surface, a midsole fixed onto the outsole, and an upper joined to the midsole along a circumferential edge of the midsole are described.
• the outsole includes a bulging part at a position corresponding to a medial side of a rearfoot portion, and the bulging part has a bulge length L1 that is measured, in top view, as a horizontal distance from a joint part between the outsole and the midsole to an outer edge of the ground contact surface.
• the bulge length L1 is longer than a horizontal length L2 from a joint part between the upper and the midsole to an outer edge of the midsole at the rearmost end.
• the present invention is applicable to a shoe.

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• Health & Medical Sciences (AREA)
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• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

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• 2019
  • 2019-06-28 EP EP19935274.1A patent/EP3981278B1/en active Active
  • 2019-06-28 CN CN201980097770.3A patent/CN114025635A/zh active Pending
  • 2019-06-28 US US17/622,896 patent/US20220240620A1/en active Pending
  • 2019-06-28 JP JP2021527298A patent/JP7402230B2/ja active Active
  • 2019-06-28 WO PCT/JP2019/025932 patent/WO2020261562A1/ja not_active Ceased

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