Shoe

Abstract

The invention provides a shoe having suitable functionality according to different purposes. A footbed of a shoe includes a buffer portion including a three-dimensional network structure in which a plurality of unit structures are repeatedly arranged so as to be adjacent to each other. In one form, the space factor of the buffer part is larger than that of the front foot part on the inner foot side, larger than that of the middle foot part on the inner foot side, larger than that of the middle foot part on the outer foot side, larger than that of the rear foot part on the inner foot side, smaller than that of the middle foot part on the inner foot side and smaller than that of the middle foot part on the outer foot side. The inner foot side middle foot part is equal to or smaller than the inner foot side rear foot part, and the outer foot side middle foot part is equal to or smaller than the outer foot side rear foot part.

Description

Technical Field

[0001] The present disclosure relates to a shoe. Background Art

[0002] In recent years, a shaped object formed by a three-dimensional stacking method has been used to form all or part of a sole or insole of a shoe. For example, Japanese Patent Laid-Open No. 2018-187363 or U.S. Patent Publication No. 2018 / 0049514 discloses a shoe boot including a sole manufactured by a three-dimensional stacking method, and U.S. Patent Application Publication No. 2018 / 0228401 discloses an insole manufactured by a three-dimensional stacking method. Summary of the invention

[0003] Generally speaking, various functions are required of shoes according to their uses. For example, the performance required of shoes used for running, which is often accompanied by kicking or landing movements, and shoes used for specific ball games such as tennis and basketball, which are often accompanied by returning movements in the left and right directions, are greatly different. In addition, even for shoes used for running, the performance required is greatly different depending on whether the shoes are used for heel strike running or midfoot running, or forefoot running.

[0004] In this regard, if a sole or insole is manufactured by a three-dimensional lamination method, various structural improvements can be made to the sole or insole due to the high degree of freedom in design, thereby providing a high-performance shoe having functions suitable for various uses. However, as far as the inventors and others know, a shoe including a sole or insole improved based on this viewpoint is not actually sufficient.

[0005] Therefore, the present disclosure is made in view of the above-mentioned aspects and can provide a shoe having appropriate functionality according to different uses.

[0006] The shoe based on the present disclosure includes a footbed that supports the sole of the wearer's foot and includes a ground contact surface. The footbed includes: a forefoot portion that supports the toe portion and the stepping portion of the wearer's foot; a midfoot portion that supports the non-stepping portion of the wearer's foot; and a rearfoot portion that supports the heel portion of the wearer's foot, and the forefoot portion, the midfoot portion, and the rearfoot portion are arranged in a continuous manner along the front-to-back direction of the shoe. When viewed in a direction orthogonal to the ground contact surface, the forefoot portion includes an inner foot side forefoot portion and an outer foot side forefoot portion divided by the center of the shoe. When viewed in a direction orthogonal to the ground contact surface, the midfoot portion includes an inner foot side midfoot portion and an outer foot side midfoot portion divided by the center of the shoe. When viewed in a direction orthogonal to the ground contact surface, the rearfoot portion includes an inner foot side rear foot portion and an outer foot side rear foot portion divided by the center of the shoe. The shoe bed includes a cushioning portion, which is configured across the inner foot forefoot portion, the outer foot forefoot portion, the inner foot midfoot portion, the outer foot midfoot portion, the inner foot rear foot portion, and the outer foot rear foot portion, and includes a three-dimensional network structure in which a plurality of unit structures are repeatedly arranged in an adjacent manner.

[0007] In the shoe based on the first aspect of the present disclosure, the occupancy factor of the buffer portion of the portion located at the inner foot side forefoot portion is greater than the occupancy factor of the buffer portion of the portion located at the outer foot side forefoot portion, the occupancy factor of the buffer portion of the portion located at the inner foot side midfoot portion is greater than the occupancy factor of the buffer portion of the portion located at the outer foot side midfoot portion, the occupancy factor of the buffer portion of the portion located at the inner foot side rear foot portion is greater than the occupancy factor of the buffer portion of the portion located at the outer foot side rear foot portion, and the occupancy factor of the buffer portion of the portion located at the inner foot side forefoot portion is greater than the occupancy factor of the buffer portion of the portion located at the outer foot side rear foot portion. The space factor of the buffer portion is smaller than that of the portion located at the middle foot portion on the inner foot side, the space factor of the buffer portion located at the front foot portion on the outer foot side is smaller than that of the portion located at the middle foot portion on the outer foot side, the space factor of the buffer portion located at the middle foot portion on the inner foot side is equal to or smaller than that of the portion located at the rear foot portion on the inner foot side, and the space factor of the buffer portion located at the middle foot portion on the outer foot side is equal to or smaller than that of the portion located at the rear foot portion on the outer foot side.

[0008] In the shoe based on the second aspect of the present disclosure, the occupancy factor of the buffer portion of the portion located at the inner foot side front foot portion is greater than the occupancy factor of the buffer portion of the portion located at the outer foot side front foot portion, the occupancy factor of the buffer portion of the portion located at the inner foot side midfoot portion is greater than the occupancy factor of the buffer portion of the portion located at the outer foot side midfoot portion, the occupancy factor of the buffer portion of the portion located at the inner foot side rear foot portion is greater than the occupancy factor of the buffer portion of the portion located at the outer foot side rear foot portion, and the occupancy factor of the buffer portion of the portion located at the inner foot side front foot portion is greater than the occupancy factor of the buffer portion of the portion located at the outer foot side rear foot portion. The space factor is equal to or greater than the space factor of the buffer portion located at the middle foot portion on the inner foot side, the space factor of the buffer portion located at the front foot portion on the outer foot side is equal to or greater than the space factor of the buffer portion located at the middle foot portion on the outer foot side, the space factor of the buffer portion located at the middle foot portion on the inner foot side is greater than the space factor of the buffer portion located at the rear foot portion on the inner foot side, and the space factor of the buffer portion located at the middle foot portion on the outer foot side is greater than the space factor of the buffer portion located at the rear foot portion on the outer foot side.

[0009] In the shoe based on the third aspect of the present disclosure, the occupancy factor of the buffer portion located at the part of the inner foot side forefoot is smaller than the occupancy factor of the buffer portion located at the part of the outer foot side forefoot, the occupancy factor of the buffer portion located at the part of the inner foot side midfoot is smaller than the occupancy factor of the buffer portion located at the part of the outer foot side midfoot, the occupancy factor of the buffer portion located at the part of the inner foot side rear foot is smaller than the occupancy factor of the buffer portion located at the part of the outer foot side rear foot, and the occupancy factor of the buffer portion located at the inner foot side forefoot is smaller than the occupancy factor of the buffer portion located at the part of the inner foot side forefoot. The space factor of the buffer portion is smaller than that of the portion located at the middle foot portion on the inner foot side, the space factor of the buffer portion located at the front foot portion on the outer foot side is smaller than that of the portion located at the middle foot portion on the outer foot side, the space factor of the buffer portion located at the middle foot portion on the inner foot side is equal to or smaller than that of the portion located at the rear foot portion on the inner foot side, and the space factor of the buffer portion located at the middle foot portion on the outer foot side is equal to or smaller than that of the portion located at the rear foot portion on the outer foot side.

[0010] In the shoe based on the fourth aspect of the present disclosure, the occupancy factor of the buffer portion of the portion located at the inner foot side forefoot portion is smaller than the occupancy factor of the buffer portion of the portion located at the outer foot side forefoot portion, the occupancy factor of the buffer portion of the portion located at the inner foot side midfoot portion is smaller than the occupancy factor of the buffer portion of the portion located at the outer foot side midfoot portion, the occupancy factor of the buffer portion of the portion located at the inner foot side rear foot portion is smaller than the occupancy factor of the buffer portion of the portion located at the outer foot side rear foot portion, and the occupancy factor of the buffer portion of the portion located at the inner foot side forefoot portion is smaller than the occupancy factor of the buffer portion of the portion located at the outer foot side rear foot portion. The space factor is equal to or greater than the space factor of the buffer portion located at the middle foot portion on the inner foot side, the space factor of the buffer portion located at the front foot portion on the outer foot side is equal to or greater than the space factor of the buffer portion located at the middle foot portion on the outer foot side, the space factor of the buffer portion located at the middle foot portion on the inner foot side is greater than the space factor of the buffer portion located at the rear foot portion on the inner foot side, and the space factor of the buffer portion located at the middle foot portion on the outer foot side is greater than the space factor of the buffer portion located at the rear foot portion on the outer foot side.

[0011] The above-described and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is an exploded view of the shoe according to the first embodiment.

[0013] Figure 2 Viewed from the right upper front side Figure 1 A perspective view of the insole shown.

[0014] Figure 3 Observed from the left lower rear side Figure 1 A perspective view of the insole shown.

[0015] Figure 4 yes Figure 1 A plan view of the insole shown.

[0016] Figure 5 Observed from the outside of the foot Figure 1 Side view of the insole shown.

[0017] Figure 6 yes Figure 1 The insole shown is along Figure 2 , Figure 4 and Figure 5 A partially broken stereogram of the VI-VI line shown in FIG.

[0018] Figure 7 It is used to illustrate Figure 1A schematic diagram of the three-dimensional structure of the base layer of the insole shown.

[0019] Figure 8 It is a schematic bottom view for explaining the space factor distribution of the insole of the first structural example.

[0020] Fig. 9 It is a schematic bottom view for explaining the space factor distribution of the insole of the second structural example.

[0021] Fig.10 It is a schematic bottom view for explaining the space factor distribution of the insole of the third structural example.

[0022] Fig.11 It is a schematic bottom view for explaining the space factor distribution of the insole of the fourth structural example.

[0023] Fig.12 It is a schematic diagram for explaining the three-dimensional structure of the base portion of the insole included in the shoe according to the first modified example.

[0024] Fig.13 It is a schematic diagram for explaining the three-dimensional structure of the base portion of the insole included in the shoe according to the second modified example.

[0025] Fig.14 It is a perspective view of the shoe according to the second embodiment.

[0026] Fig.15 It is a perspective view of the shoe according to the third embodiment.

[0027] Fig.16 It is along Fig.15 Schematic cross-sectional view along line XVI-XVI shown in FIG.

[0028] Fig.17 yes Fig.15 Exploded view of the shoe shown. DETAILED DESCRIPTION

[0029] Hereinafter, the embodiments of the present disclosure will be described in detail with reference to the drawings. In the embodiments shown below, the same or common parts are denoted by the same reference numerals in the drawings, and their description will not be repeated.

[0030] <Implementation method 1>

[0031] Figure 1 This is an exploded view of the shoe of Embodiment 1. Figure 2 and Figure 3 The image is viewed from the upper right front side and the lower left rear side. Figure 1 A perspective view of the insole shown. Figure 4 yes Figure 1 The plan view of the insole shown, Figure 5 Observed from the outside of the foot Figure 1 A side view of the insole shown. In addition, Figure 6 yes Figure 1 The insole shown is along Figure 2 , Figure 4 and Figure 5 The local broken stereogram of the VI-VI line shown in Figure 7 It is used to illustrate Figure 1 First, refer to these Figures 1 to 7 , a schematic structure of a shoe 1A according to the present embodiment and an insole 20A included therein will be described.

[0032] like Figure 1 As shown, the shoe 1A includes a shoe body 10 and an insole 20A. The shoe body 10 has a sole 11 and an upper 14 located above the sole 11. The sole 11 has a generally flat shape as a whole, and the upper 14 has a bag-like shape that covers the wearer's foot except the sole. The insole 20A has a generally flat shape as a whole and is inserted into the inside of the shoe body 10.

[0033] The sole 11 includes a midsole 12A and an outer sole 13, and the outer sole 13 is fixed to the lower surface of the midsole 12A by, for example, bonding. The lower surface of the outer sole 13 constitutes a ground contact surface 15, and the midsole 12A is a part that mainly supports the wearer's foot. The midsole 12A is preferably excellent in cushioning properties, and may include, for example, a resin foam material. The outer sole 13 is preferably excellent in wear resistance or grip, and may include, for example, a rubber member.

[0034] The upper part of the vamp 14 has a shoe opening 16 for inserting the wearer's foot, and a space for inserting the wearer's foot when wearing the shoe is formed inside. The lower end of the vamp 14 is fixed to the upper surface of the midsole 12A by, for example, bonding. As the vamp 14, for example, woven fabric or knitted fabric, non-woven fabric, synthetic leather, resin, etc. are used. In particular, in shoes and boots that require air permeability or lightness, double-layer raschel warp knitted fabrics knitted with polyester yarns are used.

[0035] The insole 20A is inserted into the inside of the shoe body 10 through the shoe opening 16 provided on the upper 14. Thus, the insole 20A is placed on the inner bottom surface of the shoe body 10 with its lower surface facing the inner bottom surface, thereby installing the insole 20A on the shoe body 10. When the insole 20A is installed on the shoe body 10, the upper surface of the insole 20A constitutes a support surface for supporting the sole of the wearer's foot.

[0036] When the wearer wears the shoe 1A, the sole 11 and the insole 20A as the footbed support the sole of the wearer's foot. At this time, the insole 20A is sandwiched between the sole 11 of the shoe body 10 and the sole of the wearer's foot.

[0037] like Figures 2 to 5 As shown, the insole 20A has a substantially flat shape, and its top view shape is substantially consistent with the shape of the inner bottom surface of the shoe body 10. The insole 20A is composed of a single component, including a shaped object made by a three-dimensional stacking method. As a three-dimensional stacking method, for example, a photoforming method is used.

[0038] exist Figure 4 In FIG. 1 , the outline of the shoe body 10 (i.e., the outline of the shoe 1A) when the shoe body 10 is equipped with the insole 20A is indicated by a double-dashed line. Figure 4 As shown, the shoe bed including the sole 11 and the insole 20A is oriented in a front-to-back direction ( 20A ) that is consistent with the length direction of the wearer's foot when viewed from above. Figure 4 The upper and lower parts of the wearer's foot are divided into a front foot part R1 that supports the toes and stepping part of the wearer's foot, a mid foot part R2 that supports the non-stepping part of the wearer's foot, and a rear foot part R3 that supports the heel part of the wearer's foot.

[0039] Here, with the front end of the shoe bed as a reference, and the position at a size equivalent to 40% of the size of the shoe bed in the front-to-back direction from the front end as the first boundary position, and the position at a size equivalent to 70% of the size of the shoe bed in the front-to-back direction from the front end as the second boundary position, the front foot R1 is equivalent to the portion included between the front end and the first boundary position along the front-to-back direction, the midfoot R2 is equivalent to the portion included between the first boundary position and the second boundary position along the front-to-back direction, and the rear foot R3 is equivalent to the portion included between the second boundary position and the rear end of the shoe sole along the front-to-back direction.

[0040] In addition, the shoe bed is arranged along the left-right direction (ie, the direction that coincides with the width direction of the wearer's foot) in a plan view. Figure 4 The left and right direction of the foot is divided into the median side of the anatomical position of the foot (i.e. the side close to the middle), i.e. the inner side of the foot ( Figure 4 The part on the S1 side shown in the figure), and the part on the anatomical side of the foot opposite to the median side (i.e., the side away from the median), i.e., the part on the lateral foot side ( Figure 4 The portion on the S2 side shown in FIG.

[0041] Here, the boundary line that divides the shoe bed into the inner foot side portion and the outer foot side portion is the so-called shoe center SC. The shoe center SC is the distance between the portion between the first toe and the second toe of the wearer and the center portion of the heel bone (the so-called heel center) when a standard wearer having a foot of a size suitable for the shoe 1A wears the shoe. Figure 4In the figure, the symbol HC represents the straight line obtained when the straight line of the heel center is projected onto the footbed in the vertical direction. The front end and the rear end of the footbed are the ends of the footbed located on the shoe center SC.

[0042] In addition, the vertical direction of the insole 20A described later refers to the thickness direction of the insole 20A having a flat shape (ie, Figure 5 More specifically, it is a direction that is orthogonal to both the direction that is consistent with the length direction of the wearer's foot, i.e., the front-to-back direction, and the direction that is consistent with the width direction of the wearer's foot, i.e., the left-to-right direction.

[0043] Here, the portion included in the forefoot portion R1 and located on the inner foot side is referred to as the inner foot side forefoot portion. Figure 4 In the figure, the symbol A is used to represent the portion included in the front foot portion R1 and on the outer foot side, and the portion is referred to as the outer foot side front foot portion. Figure 4 In the figure, the symbol B is used to represent the inner foot portion. Similarly, the inner foot portion included in the middle foot portion R2 is referred to as the inner foot side middle foot portion. Figure 4 The symbol C is used to represent the portion included in the middle foot portion R2 and on the outer foot side, and the portion is referred to as the outer foot side middle foot portion. Figure 4 In the figure, it is represented by the symbol D. Furthermore, similarly, the part included in the rear foot portion R3 and on the inner foot side is referred to as the inner foot side rear foot portion. Figure 4 The symbol E is used to represent it, and the part included in the rear foot portion R3 and on the outer foot side is called the outer foot side rear foot portion. Figure 4 It is represented by the symbol F.

[0044] like Figures 2 to 6 As shown, the insole 20A includes a base portion 21 and an upper portion 22, each of which is formed into a layer. The base portion 21 includes an upper surface 21a (particularly referring to Figure 6 ) and the lower surface 21b, which constitute the lower side of the insole 20A. The upper layer portion 22 includes an upper surface 22a and a lower surface 22b (see in particular Figure 6 ), the upper side portion of the insole 20A is formed by covering the upper surface 21a of the base portion 21. That is, the insole 20A has a two-layer structure including the base portion 21 and the upper portion 22.

[0045] As described above, the insole 20A is composed of a single member, so the upper surface 21a of the base portion 21 and the lower surface 22b of the upper portion 22 are formed to be continuous with each other. That is, the upper surface 21a of the base portion 21 and the lower surface 22b of the upper portion 22 are boundary surfaces that generate the structural differences between the base portion 21 and the upper portion 22, which will be described later.

[0046] like Figure 7 As shown, the base part 21 includes a three-dimensional mesh structure 2A, and the three-dimensional mesh structure 2A is formed by repeatedly arranging a plurality of unit structures 3A in an adjacent manner using a three-dimensional lattice structure. Here, in the insole 20A included in the shoe 1A of this embodiment, the unit structures 3A are repeatedly and continuously arranged along three substantially orthogonal axial directions, thereby providing a plurality of holes inside the base part 21 and on its outer surface.

[0047] More specifically, the plurality of unit structures 3A are regularly and continuously arranged repeatedly in the width direction (the X direction shown in the figure), the depth direction (the Y direction shown in the figure), and the height direction (the Z direction shown in the figure). Figure 7 In the figure, only three unit structures 3A adjacent to each other in the width direction, the depth direction, and the height direction are extracted and shown, and their fracture surfaces are given a dark color.

[0048] The unit structure 3A including the three-dimensional lattice structure has a three-dimensional shape formed by connecting a plurality of columns extending in a predetermined direction. As the unit structure 3A, various unit structures can be used, for example, a rectangular parallelepiped lattice, a diamond lattice, an octahedral lattice, a double pyramid lattice, a fluorite lattice, or various structures formed by attaching various supports to these lattices. In addition, the illustrated unit structure 3A is a structure formed by attaching a central support to a rectangular parallelepiped lattice.

[0049] When the base portion 21 of the insole 20A is formed of the three-dimensional network structure 2A as described above, it is preferred that each unit structure 3A be deformed as necessary so that the outer shape of the three-dimensional network structure 2A is consistent with the outer shape of the insole 20A. In this way, the outer surface of the insole 20A can be made smooth.

[0050] like Figures 2 to 6 As shown, by arranging the base part 21 constructed as described above at the lower side of the insole 20A, the base part 21 functions as a buffer part SA having a high deformation capacity as a whole. In this way, by providing the buffer part SA including the three-dimensional mesh structure 2A in the insole 20A, the insole 20A can have a high deformation capacity, so that a comfortable insole with excellent cushioning performance can be made, and an insole with improved stability when worn can also be made. In addition, since the base part 21 has the above structure, it can also be made into an insole that is light compared to its size, and further, it can also be made into an insole with excellent ventilation.

[0051] The lower surface 21b of the base portion 21 is arranged to face the inner bottom surface of the shoe body 10 when the insole 20A is mounted on the shoe body 10. The lower surface 21b of the base portion 21 has a concave-convex shape due to the provision of the plurality of holes, but is generally flat as a whole. Here, the lower surface 21b of the base portion 21 may also be provided with a symbol or design portion such as a text or logo, a pattern, or an authentication identification code by further shaping as needed.

[0052] On the other hand, Figures 2 to 6 As shown, the upper layer 22 includes a sheet-like structure. The upper layer 22 including the sheet-like structure is provided with a plurality of holes 22c that penetrate the upper layer 22 in the thickness direction thereof (i.e., the up-down direction of the insole 20A). These plurality of holes 22c are exposed at the upper surface 22a of the upper layer 22, respectively, and face the base layer 21 at the lower surface 22b of the upper layer 22. Therefore, most of these plurality of holes 22c are connected with the holes provided on the inner and outer surfaces of the base layer 21 at the boundary surface between the upper layer 22 and the base layer 21.

[0053] In addition, the upper surface 22a of the upper layer 22 is configured so that the portion corresponding to the front foot portion R1 has a generally flat shape as a whole, and the portions corresponding to the midfoot portion R2 and the rear foot portion R3 have a generally concave shape as a whole so as to fit the sole of the wearer's foot. As described above, although the plurality of holes 22c are located on the upper surface 22a of the upper layer 22, the upper surface 22 has a smooth shape as a whole.

[0054] The upper layer portion 22 constructed as described above is arranged on the upper side of the insole 20A, so that the base layer 21 formed with a plurality of fine projections and depressions on its upper surface 21a due to the presence of a plurality of holes on the inner and outer surfaces is covered by the upper layer portion 22, and the portion in contact with the sole of the user's foot, i.e., the upper surface of the insole 20A includes a smoothly formed upper surface 22a of the upper layer portion 22 including the sheet-like structure, thereby making it possible to produce not only an insole that has a good touch to the foot and is comfortable to wear, but also an insole with excellent breathability.

[0055] In addition, by arranging the upper layer 22 constructed in the above manner on the upper side of the insole 20A, the contact area with the sole of the wearer's foot is also increased, so that the stability of the insole when worn can be improved, and the insole can be made into an insole that can further effectively disperse the foot pressure. Furthermore, since the base layer 21 including the three-dimensional network structure 2A is also protected by the upper layer 22, the insole can be made into an insole with excellent durability.

[0056] The material of the insole 20A is not particularly limited, and is preferably a resin material or a rubber material so as to have corresponding softness, ductility, durability, elasticity, stability, etc. More specifically, when the insole 20A is made of resin, for example, it can be made of polyolefin resin, ethylene vinyl acetate copolymer (ethylene vinyl acetate, EVA), polyamide thermoplastic elastomer (TPA (thermoplastic polyamide), TPAE (thermoplastic polyamide elastomer)), thermoplastic polyurethane (thermoplastic polyurethanes, TPU), polyester thermoplastic elastomer (thermoplastic polyester ester elastomer, TPEE). On the other hand, when the insole 20A is made of rubber, for example, it can be made of butadiene rubber (BR).

[0057] The insole 20A may include a polymer composition. In this case, examples of the polymer contained in the polymer composition include olefin polymers such as olefin elastomers and olefin resins. Examples of the olefin polymer include polyethylene (e.g., linear low-density polyethylene (LLDPE), high-density polyethylene (HDPE), etc.), polypropylene, ethylene-propylene copolymers, propylene-1-hexene copolymers, propylene-4-methyl-1-pentene copolymers, propylene-1-butene copolymers, ethylene-1-hexene copolymers, ethylene-4-methyl-pentene copolymers, ethylene-1-butene copolymers, 1-butene-1-hexene copolymers, 1-butene-4-methyl-pentene, ethylene-methacrylic acid copolymers, ethylene-methyl methacrylate copolymers, ethylene-ethyl methacrylate copolymers, ethylene-butyl methacrylate copolymers, ethylene-methyl acrylate copolymers, ethylene-ethyl acrylate copolymers, ethylene-butyl acrylate copolymers, propylene-methacrylic acid copolymers, propylene-methyl methacrylate copolymers, propylene-ethyl methacrylate copolymers, propylene-butyl methacrylate copolymers, propylene-methyl acrylate copolymers, propylene-ethyl acrylate copolymers, propylene-butyl acrylate copolymers, ethylene-vinyl acetate copolymers, and propylene-vinyl acetate copolymers.

[0058] The polymer may be an amide polymer such as an amide elastomer or an amide resin. Examples of the amide polymer include polyamide 6, polyamide 11, polyamide 12, polyamide 66, and polyamide 610.

[0059] The polymer may be an ester polymer such as an ester elastomer or an ester resin. Examples of the ester polymer include polyethylene terephthalate and polybutylene terephthalate.

[0060] The polymer may be a urethane polymer such as a urethane elastomer or a urethane resin. Examples of the urethane polymer include polyester polyurethane and polyether polyurethane.

[0061] Furthermore, the polymer may be, for example, a styrene-based polymer such as a styrene-based elastomer or a styrene-based resin. Examples of the styrene-based elastomer include styrene-ethylene-butadiene copolymer (SEB), styrene-butadiene-styrene copolymer (SBS), hydrogenated SBS (styrene-ethylene-butylene-styrene copolymer (SEBS)), styrene-isoprene-styrene copolymer (SIS), hydrogenated SIS (styrene-ethylene-propylene-styrene copolymer (SEPS)), styrene-isobutylene-styrene copolymer (SIBS), styrene-butadiene-styrene-butadiene (SBSB), styrene-butadiene- ... Styrene (SBSBS), etc. Examples of the styrene-based resin include polystyrene, acrylonitrile styrene resin (AS), and acrylonitrile butadiene styrene resin (ABS).

[0062] In addition, the polymer may be, for example, an acrylic polymer such as polymethyl methacrylate, a urethane acrylic polymer, a polyester acrylic polymer, a polyether acrylic polymer, a polycarbonate acrylic polymer, an epoxy acrylic polymer, a conjugated diene polymer acrylic polymer and a hydrogenated product thereof, a urethane methacrylic polymer, a polyester methacrylic polymer, a polyether methacrylic polymer, a polycarbonate methacrylic polymer, a polyester urethane acrylate, a polycarbonate urethane acrylate, a polyether urethane acrylate, an epoxy methacrylic polymer, a conjugated diene polymer methacrylic polymer and a hydrogenated product thereof, a polyvinyl chloride resin, a silicone elastomer, butadiene rubber, isoprene rubber (IR), chloroprene rubber (CR), natural rubber (NR), styrene butadiene rubber (SBR), acrylonitrile butadiene rubber (NBR), butyl rubber (IIR), and the like.

[0063] As described above, the insole 20A preferably includes a material having flexibility, and therefore, among the types of materials, it is particularly preferred to include urethane acrylate. When the insole 20A includes urethane acrylate, it not only has excellent durability or ductility, but also has sufficient elasticity. In addition, as described above, since the insole 20A is manufactured by, for example, a three-dimensional lamination molding method of a photoforming method, a hardener may be included in the insole 20A as a secondary component.

[0064] In addition, in the shoe 1A of the present embodiment, an example is given of a case where the insole 20A is constructed to include a base portion 21 and an upper portion 22, wherein the base portion 21 includes a buffer portion SA including a three-dimensional mesh structure 2A, and the upper portion 22 includes a sheet structure covering the base portion 21, but the upper portion 22 is not required, and the insole 20A may also be constructed only of the base portion 21 including the buffer portion SA including the three-dimensional mesh structure 2A.

[0065] As described above, in the shoe 1A of the present embodiment, the insole 20A used and placed on the sole 11 of the shoe body 10 includes a buffer portion SA including a three-dimensional mesh structure 2A. As described above, the buffer portion SA can be manufactured by a three-dimensional stacking molding method, so that the insole 20A can be improved in various aspects of structure in terms of its high degree of design freedom. In this regard, in the shoe 1A of the present embodiment, the insole 20 can be configured as, for example, the insole 20A1 to the insole 20A3 of the first to third structural examples shown below, depending on the use of the shoe 1A.

[0066] Here, the space factor in the buffer portion SA described later means the volume ratio of the solid part (that is, the part other than the hole (hollow part)) per predetermined volume of the three-dimensional network structure 2A. Generally, the part with a large space factor has high rigidity, and the part with a small space factor has low rigidity. In addition, the specific size of the space factor of the buffer portion SA is not particularly limited, but is generally set to be greater than 5% and less than 80%. As a part that imparts high rigidity, the space factor is generally set to be greater than 30% (or greater than 35% depending on the situation), and as a part that imparts low rigidity, the space factor is generally set to be less than 30% (or less than 25% depending on the situation).

[0067] As a method of making the space factor in the cushioning part SA different for each part as described later, for example, it is conceivable to change the size of the unit structure 3A for each part of the cushioning part SA, or to change the thickness of the column included in the unit structure 3A for each part of the cushioning part SA, or to change the structure of the unit structure 3A itself for each part of the cushioning part SA. Among them, in order to make the space factor of the cushioning part SA different for each part without deteriorating the touch of the foot, it is particularly effective to configure the cushioning part SA so that the size of the unit structure 3A gradually changes.

[0068] In addition, as a method for calculating the space factor, the specific gravity of the material constituting the three-dimensional network structure 2A can be measured, and the parts corresponding to the inner foot front foot, outer foot front foot, inner foot middle foot, outer foot middle foot, inner foot rear foot and outer foot rear foot in the present disclosure can be cut out from the three-dimensional network structure 2A, and the volume (including the solid part and the hollow part) and weight of each cut-out part can be measured, thereby calculating based on these specific gravity, volume and weight.

[0069] (First Configuration Example)

[0070] Figure 8 1 is a schematic bottom view for explaining the space factor distribution of the insole of the first structural example. Figure 8The insole 20A1 of the first structural example will be described. The shoe 1A including the insole 20A1 is, for example, a running shoe designed for heel-strike running or mid-foot running.

[0071] In running shoes designed for heel-strike running or mid-foot running, from the perspective of suppressing so-called overpronation, it is particularly required to provide high stability to the medial side of the wearer's foot when landing, and from the perspective of preventing the accumulation of fatigue or injury associated with the contact of the heel, it is particularly required to have a high holding function for the portion from the heel of the wearer's foot to the medial longitudinal arch and the lateral longitudinal arch.

[0072] Here, in order to achieve high stability for the inner foot side of the wearer's foot when landing, it is effective to make the rigidity of the inner foot side of the shoe bed higher than the rigidity of the outer foot side. In order to achieve a high holding function for the part from the heel to the inner longitudinal arch and the outer longitudinal arch of the wearer's foot, it is effective to increase the rigidity of the midfoot part R2 and the rear foot part R3 of the shoe bed.

[0073] Regarding this, Figure 8 As shown, in the insole 20A1 of the first structural example, the cushioning portion SA including the three-dimensional network structure 2A is configured to satisfy the following conditions 1-1 to 1-7.

[0074] Condition 1-1: The space factor of the cushioning portion SA located at the inner forefoot portion A is greater than the space factor of the cushioning portion SA located at the outer forefoot portion B.

[0075] Condition 1-2: The space factor of the cushioning portion SA located at the inner foot side midfoot portion C is greater than the space factor of the cushioning portion SA located at the outer foot side midfoot portion D.

[0076] Condition 1-3: The space factor of the cushioning portion SA located at the inner rear foot portion E is greater than the space factor of the cushioning portion SA located at the outer rear foot portion F.

[0077] Condition 1-4: The space factor of the cushioning portion SA located at the inner forefoot portion A is smaller than the space factor of the cushioning portion SA located at the inner midfoot portion C.

[0078] Condition 1-5: The space factor of the cushioning portion SA located at the outer foot side front foot portion B is smaller than the space factor of the cushioning portion SA located at the outer foot side midfoot portion D.

[0079] Condition 1-6: The space factor of the cushioning portion SA at the portion located at the inner foot side midfoot portion C is equal to or smaller than the space factor of the cushioning portion SA at the portion located at the inner foot side rear foot portion E.

[0080] Condition 1-7: The space factor of the cushioning portion SA at the portion located at the midfoot portion D on the outer foot side is equal to or smaller than the space factor of the cushioning portion SA at the portion located at the rearfoot portion F on the outer foot side.

[0081] In addition, Figure 8 In the figure, the curve graph on the left side of the figure represents the distribution of the duty factor of the portion along the shoe center SC, and the curve graph on the lower side of the figure represents the distribution of the duty factor of the portion along the line 100 shown in the figure which is orthogonal to the shoe center SC and passes through the heel center HC.

[0082] By configuring the cushioning portion SA so as to satisfy conditions 1-1 to 1-3, the rigidity of the portion on the inner foot side of the shoe bed can be increased compared to the rigidity of the portion on the outer foot side. Therefore, by configuring the shoe 1A so as to satisfy conditions 1-1 to 1-3, a shoe can be manufactured that achieves high stability for the portion on the inner foot side of the wearer's foot when landing.

[0083] In addition, by configuring the cushioning portion SA so as to satisfy conditions 1-4 to 1-7, the rigidity of the midfoot portion R2 and the rearfoot portion R3 of the shoe bed can be increased compared to the rigidity of the frontfoot portion R1, and the rigidity of the rearfoot portion R3 of the shoe bed can be made equal to or higher than the rigidity of the midfoot portion R2. Therefore, by configuring the shoe 1A so as to satisfy conditions 1-4 to 1-7, a shoe can be manufactured that realizes a high holding function for the portion from the heel portion to the medial longitudinal arch and the lateral longitudinal arch of the wearer's foot.

[0084] Therefore, by configuring the shoe 1A so as to satisfy the above-mentioned conditions 1-1 to 1-7, a shoe particularly suitable for heel-strike running or mid-foot running can be obtained.

[0085] Here, in order to make the function difference between the middle foot R2 and the rear foot R3 more obvious, the occupancy factor of the buffer part SA located at the middle foot C on the inner foot side can be made smaller than the occupancy factor of the buffer part SA located at the rear foot E on the inner foot side. In addition, the occupancy factor of the buffer part SA located at the middle foot D on the outer foot side can be made smaller than the occupancy factor of the buffer part SA located at the rear foot F on the outer foot side.

[0086] In addition, from the viewpoint of preventing deterioration of the foot touch feeling, it is preferable to configure so that the rigidity of the cushioning portion SA does not locally change greatly. Figure 8 As shown in the graph shown in FIG. 1 , it is preferable to configure the cushioning portion SA in a manner in which the occupancy factor gradually changes. In addition, from the perspective of being able to improve the fit to the wearer's foot and stably maintain the foot, as shown in FIG. Figure 8 As shown in the graph shown in FIG. 1 , it is preferable to increase the rigidity of the peripheral portion of the buffer portion SA.

[0087] (Second Configuration Example)

[0088] Fig. 9 2 is a schematic bottom view for explaining the space factor distribution of the insole of the second structural example. Fig. 9 Next, the insole 20A2 of the second structural example will be described. The shoe 1A including the insole 20A2 is, for example, a running shoe that is assumed to be used for forefoot running.

[0089] In running shoes that are designed to run with the forefoot method, from the perspective of suppressing so-called excessive pronation, it is particularly required that the inner side of the wearer's foot when landing be given high stability; from the perspective of increasing the propulsion force when kicking off, it is particularly required to have an efficient transmission function based on the kicking force of the toe of the wearer's foot to the ground; from the perspective of preventing the accumulation of fatigue or injuries, it is particularly required to have a high retention function for the medial and lateral longitudinal arches of the wearer's foot; and from the perspective of alleviating impact, it is particularly required to have a high cushioning function for the heel of the wearer's foot when landing.

[0090] Here, in order to achieve high stability for the inner foot side of the wearer's foot when landing, it is effective to increase the rigidity of the inner foot side of the shoe bed compared to the outer foot side. In order to achieve an efficient transmission function based on the kicking force of the toe of the wearer's foot to the ground and to achieve a high retention function of the inner longitudinal arch and the outer longitudinal arch of the wearer's foot, it is effective to increase the rigidity of the front foot portion R1 and the midfoot portion R2 of the shoe bed. Furthermore, in order to achieve high cushioning for the heel portion of the wearer's foot when landing, it is effective not to increase the rigidity of the rear foot portion R3 extremely compared to the rigidity of the front foot portion R1 and the midfoot portion R2 of the shoe bed.

[0091] Regarding this, Fig. 9 As shown, in the insole 20A2 of the second structural example, the cushioning portion SA including the three-dimensional network structure 2A is configured to satisfy the following conditions 2-1 to 2-7.

[0092] Condition 2-1: The space factor of the cushioning portion SA located at the inner forefoot portion A is greater than the space factor of the cushioning portion SA located at the outer forefoot portion B.

[0093] Condition 2-2: The space factor of the cushioning portion SA located at the inner foot side midfoot portion C is greater than the space factor of the cushioning portion SA located at the outer foot side midfoot portion D.

[0094] Condition 2-3: The space factor of the cushioning portion SA located at the inner rear foot portion E is greater than the space factor of the cushioning portion SA located at the outer rear foot portion F.

[0095] Condition 2-4: The space factor of the cushioning portion SA at the portion located at the inner foot side forefoot portion A is equal to or greater than the space factor of the cushioning portion SA at the portion located at the inner foot side midfoot portion C.

[0096] Condition 2-5: The space factor of the cushioning portion SA at the portion located at the outer foot side front foot portion B is equal to or greater than the space factor of the cushioning portion SA at the portion located at the outer foot side midfoot portion D.

[0097] Condition 2-6: The space factor of the cushioning portion SA located at the inner midfoot portion C is greater than the space factor of the cushioning portion SA located at the inner hindfoot portion E.

[0098] Condition 2-7: The space factor of the cushioning portion SA located at the midfoot portion D on the outer foot side is greater than the space factor of the cushioning portion SA located at the rearfoot portion F on the outer foot side.

[0099] In addition, Fig. 9 In the figure, the curve graph on the left side of the figure represents the distribution of the duty factor of the portion along the shoe center SC, and the curve graph on the lower side of the figure represents the distribution of the duty factor of the portion along the line 100 shown in the figure which is orthogonal to the shoe center SC and passes through the heel center HC.

[0100] By configuring the cushioning portion SA so as to satisfy conditions 2-1 to 2-3, the rigidity of the portion on the inner foot side of the shoe bed can be increased compared to the rigidity of the portion on the outer foot side. Therefore, by configuring the shoe 1A so as to satisfy conditions 2-1 to 2-3, a shoe can be manufactured that achieves high stability for the portion on the inner foot side of the wearer's foot when landing.

[0101] In addition, by configuring the cushioning portion SA in a manner satisfying conditions 2-4 to 2-7, the rigidity of the front foot portion R1 and the middle foot portion R2 of the shoe bed can be increased, and the rigidity of the rear foot portion R3 can be prevented from being extremely increased compared to the rigidity of the front foot portion R1 and the middle foot portion R2 of the shoe bed. Therefore, by configuring the shoe 1A in a manner satisfying conditions 2-4 to 2-7, a shoe can be made that realizes the following functions: realizes the function of efficiently transmitting the kicking force based on the toe portion of the wearer's foot to the ground, realizes the function of highly maintaining the medial longitudinal arch and the lateral longitudinal arch of the wearer's foot, and also realizes the function of imparting high cushioning properties to the heel portion of the wearer's foot when landing.

[0102] Therefore, by configuring the shoe 1A so as to satisfy the above-mentioned conditions 2-1 to 2-7, a shoe particularly suitable for forefoot running can be obtained.

[0103] Here, in order to make the front foot portion R1 and the midfoot portion R2 have a clearer functional difference, the occupancy factor of the buffer portion SA of the portion of the front foot portion A located on the inner foot side can be made greater than the occupancy factor of the buffer portion SA of the portion of the midfoot portion C located on the inner foot side. In addition, the occupancy factor of the buffer portion SA of the portion of the front foot portion B located on the outer foot side can be made greater than the occupancy factor of the buffer portion SA of the portion of the midfoot portion D located on the outer foot side.

[0104] In addition, from the viewpoint of preventing deterioration of the foot touch feeling, it is preferable to configure so that the rigidity of the cushioning portion SA does not locally change greatly. Fig. 9 As shown in the graph shown in FIG. 1 , it is preferable to configure the cushioning portion SA in a manner in which the occupancy factor gradually changes. In addition, from the perspective of being able to improve the fit to the wearer's foot and stably maintain the foot, as shown in FIG. Fig. 9 As shown in the graph shown in FIG. 1 , it is preferable to increase the rigidity of the peripheral portion of the buffer portion SA.

[0105] (Third Configuration Example)

[0106] Fig.10 3 is a schematic bottom view for explaining the space factor distribution of the insole of the third structural example. Fig.10 Next, the insole 20A3 of the third structural example will be described. The shoe 1A including the insole 20A3 is a shoe used for specific ball games such as tennis.

[0107] In shoes used for specific ball games such as tennis, there are many returning movements in the left and right directions, so it is particularly required to give high stability to the outer side of the wearer's foot during the returning movement. From the perspective of preventing the accumulation of fatigue or injury associated with the contact of the heel, a high holding function is particularly required for the part from the heel of the wearer's foot to the medial longitudinal arch and the lateral longitudinal arch.

[0108] Here, in order to achieve high stability for the outer foot side of the wearer's foot during the counterattack, it is effective to increase the rigidity of the outer foot side of the shoe bed compared to the inner foot side. In order to achieve a high holding function for the part from the heel to the inner longitudinal arch and the outer longitudinal arch of the wearer's foot, it is effective to increase the rigidity of the midfoot R2 and rear foot R3 of the shoe bed.

[0109] Regarding this, Fig.10 As shown, in the insole 20A3 of the third structural example, the cushioning portion SA including the three-dimensional network structure 2A is configured to satisfy the following conditions 3-1 to 3-7.

[0110] Condition 3-1: The space factor of the cushioning portion SA located at the inner forefoot portion A is smaller than the space factor of the cushioning portion SA located at the outer forefoot portion B.

[0111] Condition 3-2: The space factor of the cushioning portion SA located at the inner foot side midfoot portion C is smaller than the space factor of the cushioning portion SA located at the outer foot side midfoot portion D.

[0112] Condition 3-3: The space factor of the cushioning portion SA at the portion located at the inner foot side rear foot portion E is smaller than the space factor of the cushioning portion SA at the portion located at the outer foot side rear foot portion F.

[0113] Condition 3-4: The space factor of the cushioning portion SA located at the inner forefoot portion A is smaller than the space factor of the cushioning portion SA located at the inner midfoot portion C.

[0114] Condition 3-5: The space factor of the cushioning portion SA located at the outer foot side front foot portion B is smaller than the space factor of the cushioning portion SA located at the outer foot side midfoot portion D.

[0115] Condition 3-6: The space factor of the cushioning portion SA at the portion located at the inner foot side midfoot portion C is equal to or smaller than the space factor of the cushioning portion SA at the portion located at the inner foot side rear foot portion E.

[0116] Condition 3-7: The space factor of the cushioning portion SA at the portion located at the midfoot portion D on the outer foot side is equal to or smaller than the space factor of the cushioning portion SA at the portion located at the rearfoot portion F on the outer foot side.

[0117] In addition, Fig.10 In the figure, the curve graph on the left side of the figure represents the distribution of the duty factor of the portion along the shoe center SC, and the curve graph on the lower side of the figure represents the distribution of the duty factor of the portion along the line 100 shown in the figure which is orthogonal to the shoe center SC and passes through the heel center HC.

[0118] By configuring the cushioning part SA so as to satisfy the conditions 3-1 to 3-3, the rigidity of the outer foot side portion of the shoe bed can be increased compared to the rigidity of the inner foot side portion. Therefore, by configuring the shoe 1A so as to satisfy the conditions 3-1 to 3-3, a shoe can be manufactured that achieves high stability for the outer foot side portion of the wearer's foot during a return action.

[0119] In addition, by configuring the cushioning portion SA so as to satisfy conditions 3-4 to 3-7, the rigidity of the midfoot portion R2 and the rearfoot portion R3 of the shoe bed can be increased compared to the rigidity of the frontfoot portion R1, and the rigidity of the rearfoot portion R3 of the shoe bed can be made equal to or higher than the rigidity of the midfoot portion R2. Therefore, by configuring the shoe 1A so as to satisfy conditions 3-4 to 3-7, a shoe can be manufactured that realizes a high holding function for the portion from the heel portion to the medial longitudinal arch and the lateral longitudinal arch of the wearer's foot.

[0120] Therefore, by configuring the shoe 1A in a manner that satisfies the above-mentioned conditions 3-1 to 3-7, a shoe can be made that is particularly suitable for specific ball game uses such as tennis, which is often accompanied by return movements in the left and right directions and ground contact from the heel.

[0121] Here, in order to make the function difference between the middle foot R2 and the rear foot R3 more obvious, the occupancy factor of the buffer part SA located at the middle foot C on the inner foot side can be made smaller than the occupancy factor of the buffer part SA located at the rear foot E on the inner foot side. In addition, the occupancy factor of the buffer part SA located at the middle foot D on the outer foot side can be made smaller than the occupancy factor of the buffer part SA located at the rear foot F on the outer foot side.

[0122] In addition, from the viewpoint of preventing deterioration of the foot touch feeling, it is preferable to configure so that the rigidity of the cushioning portion SA does not locally change greatly. Fig.10 As shown in the graph shown in FIG. 1 , it is preferable to configure the cushioning portion SA in a manner in which the occupancy factor gradually changes. In addition, from the perspective of being able to improve the fit to the wearer's foot and stably maintain the foot, as shown in FIG. Fig.10 As shown in the graph shown in FIG. 1 , it is preferable to increase the rigidity of the peripheral portion of the buffer portion SA.

[0123] (Fourth Configuration Example)

[0124] Fig.11 4 is a schematic bottom view for explaining the space factor distribution of the insole of the fourth structural example. Fig.11 Next, a fourth structural example of the insole 20A4 will be described. The shoe 1A including the insole 20A4 is a shoe used for specific ball games such as table tennis or basketball.

[0125] In shoes used for specific ball games such as table tennis and basketball, there are often returning actions in the left and right directions, so it is particularly required to give high stability to the outer side of the wearer's foot during the returning action. From the perspective of increasing the propulsive force during kicking, it is particularly required to have a function for efficiently transmitting the kicking force from the toes and stepping part of the wearer's foot to the ground.

[0126] Here, in order to achieve high stability for the outer foot side of the wearer's foot during the counterattack, it is effective to increase the rigidity of the outer foot side of the shoe bed compared to the inner foot side. In order to achieve the efficient transmission function of the kicking force based on the toe and stepping part of the wearer's foot to the ground, it is effective to increase the rigidity of the front foot R1 and the midfoot R2 of the shoe bed.

[0127] Regarding this, Fig.11As shown, in the insole 20A4 of the fourth structural example, the cushioning portion SA including the three-dimensional network structure 2A is configured to satisfy the following conditions 4-1 to 4-7.

[0128] Condition 4-1: The space factor of the cushioning portion SA located at the inner forefoot portion A is smaller than the space factor of the cushioning portion SA located at the outer forefoot portion B.

[0129] Condition 4-2: The space factor of the cushioning portion SA located at the inner foot side midfoot portion C is smaller than the space factor of the cushioning portion SA located at the outer foot side midfoot portion D.

[0130] Condition 4-3: The space factor of the cushioning portion SA located at the inner rear foot portion E is smaller than the space factor of the cushioning portion SA located at the outer rear foot portion F.

[0131] Condition 4-4: The space factor of the cushioning portion SA at the portion located at the inner foot side forefoot portion A is equal to or greater than the space factor of the cushioning portion SA at the portion located at the inner foot side midfoot portion C.

[0132] Condition 4-5: The space factor of the cushioning portion SA at the portion located at the outer foot side front foot portion B is equal to or greater than the space factor of the cushioning portion SA at the portion located at the outer foot side midfoot portion D.

[0133] Condition 4-6: The space factor of the cushioning portion SA located at the inner midfoot portion C is greater than the space factor of the cushioning portion SA located at the inner hindfoot portion E.

[0134] Condition 4-7: The space factor of the cushioning portion SA located at the midfoot portion D on the outer foot side is greater than the space factor of the cushioning portion SA located at the rearfoot portion F on the outer foot side.

[0135] In addition, Fig.11 In the figure, the curve graph on the left side of the figure represents the distribution of the duty factor of the portion along the shoe center SC, and the curve graph on the lower side of the figure represents the distribution of the duty factor of the portion along the line 100 shown in the figure which is orthogonal to the shoe center SC and passes through the heel center HC.

[0136] By configuring the cushioning part SA so as to satisfy conditions 4-1 to 4-3, the rigidity of the outer foot side portion of the shoe bed can be increased compared to the rigidity of the inner foot side portion. Therefore, by configuring the shoe 1A so as to satisfy conditions 4-1 to 4-3, a shoe can be manufactured that achieves high stability for the outer foot side portion of the wearer's foot during a return action.

[0137] In addition, by configuring the cushioning portion SA so as to satisfy conditions 4-4 to 4-7, the rigidity of the front foot portion R1 of the shoe bed can be made equal to or higher than the rigidity of the midfoot portion R2, and the rigidity of the midfoot portion R2 of the shoe bed can be made higher than the rigidity of the rear foot portion R3. Therefore, by configuring the shoe 1A so as to satisfy conditions 4-4 to 4-7, a shoe can be made that realizes the function of efficiently transmitting the kicking force of the toe and the stepping part of the wearer's foot to the ground.

[0138] Therefore, by constructing the shoe 1A in a manner that satisfies conditions 4-1 to 4-7, a shoe can be made that is particularly suitable for specific ball games such as table tennis and basketball, which are often accompanied by returning actions in the left and right directions and require the use of kicking force based on the toes and the pedaling part.

[0139] Here, in order to make the front foot portion R1 and the midfoot portion R2 have a clearer functional difference, the occupancy factor of the buffer portion SA of the portion of the front foot portion A located on the inner foot side can be made greater than the occupancy factor of the buffer portion SA of the portion of the midfoot portion C located on the inner foot side. In addition, the occupancy factor of the buffer portion SA of the portion of the front foot portion B located on the outer foot side can be made greater than the occupancy factor of the buffer portion SA of the portion of the midfoot portion D located on the outer foot side.

[0140] In addition, from the viewpoint of preventing deterioration of the foot touch feeling, it is preferable to configure so that the rigidity of the cushioning portion SA does not locally change greatly. Fig.11 As shown in the graph shown in FIG. 1 , it is preferable to configure the cushioning portion SA in a manner in which the occupancy factor gradually changes. In addition, from the perspective of being able to improve the fit to the wearer's foot and stably maintain the foot, as shown in FIG. Fig.11 As shown in the graph shown in FIG. 1 , it is preferable to increase the rigidity of the peripheral portion of the buffer portion SA.

[0141] As described above, by configuring as the shoe 1A of the present embodiment, it is possible to provide a shoe having appropriate functionality depending on the use.

[0142] In addition, the space factor distribution in the thickness direction of the buffer portion SA is assumed to be any one of the following first and second aspects.

[0143] The first embodiment is an embodiment in which the space factor of the portion of the buffer portion SA on the ground contact surface 15 side (i.e., the lower side) is larger than the space factor of the portion of the buffer portion SA on the side opposite to the ground contact surface 15 side (i.e., the upper side). In the case of such a configuration, the portion on the lower side of the buffer portion SA has high hardness, and the portion on the upper side of the buffer portion SA has low hardness, so that the strength of the buffer portion SA on the ground contact surface 15 side is increased, and durability can be improved.

[0144] The second embodiment is an embodiment in which the space factor of the portion of the buffer portion SA on the ground contact surface 15 side (i.e., the lower side) is smaller than the space factor of the portion of the buffer portion SA on the side opposite to the ground contact surface 15 side (i.e., the upper side). In the case of such a configuration, the portion on the lower side of the buffer portion SA has low hardness, and the portion on the upper side of the buffer portion SA has high hardness, so that the cushioning performance can be improved by improving the deformation capacity of the buffer portion SA.

[0145] <First Modification>

[0146] Fig.12 1 is a schematic diagram for explaining the three-dimensional structure of the base portion of the insole included in the shoe of the first modified example. Fig.12 , an insole 20B included in a shoe according to a first modified example of the first embodiment will be described.

[0147] When the insole 20B included in the shoe of the first modification is compared with the insole 20A included in the shoe 1A of the first embodiment, the difference in structure is only that the base portion 21 has a different three-dimensional structure.

[0148] Specifically, if Fig.12 As shown, the base portion 21 of the insole 20B included in the shoe of the first variant includes a three-dimensional mesh structure 2B, wherein the three-dimensional mesh structure 2B is formed by setting the three-dimensional wall structure as a unit structure 3B and repeatedly arranging a plurality of the unit structures 3B in an adjacent manner. More specifically, the plurality of unit structures 3B are repeatedly arranged regularly and continuously along the width direction (the X direction shown in the figure), the depth direction (the Y direction shown in the figure), and the height direction (the Z direction shown in the figure). Fig.12 In the figure, only three unit structures 3B adjacent to each other in the width direction, the depth direction, and the height direction are extracted and shown, and their fracture surfaces are given a dark color.

[0149] The unit structure 3B including the three-dimensional wall structure has a three-dimensional shape formed by a wall whose outer shape is defined by a pair of parallel curved surfaces. Here, the illustrated unit structure 3B is a structure formed by increasing the thickness of the Schwarz P structure, which is a kind of mathematically defined triple periodic minimal surface. In addition, the so-called minimal surface is defined as a surface with the smallest area among the surfaces having a given closed curve at the boundary.

[0150] Here, in the insole 20B included in the shoe of the first variant, the buffer portion SA including the three-dimensional network structure 2B is also constructed in a manner that satisfies conditions 1-1 to 1-7 described in the first structural example, or conditions 2-1 to 2-7 described in the second structural example, or conditions 3-1 to 3-7 described in the third structural example, or conditions 4-1 to 4-7 described in the fourth structural example, thereby making it possible to manufacture a shoe with appropriate functionality depending on its use.

[0151] In addition, as a unit structure 3B including a three-dimensional wall structure having a three-dimensional shape formed by a wall whose outer shape is defined by a pair of parallel curved surfaces, in addition to this, a gyroid structure, a Schwarz D structure, or the like which is a structure based on a triply periodic minimal surface and having its thickness increased can be used.

[0152] <Second Modification>

[0153] Fig.13 2 is a schematic diagram for explaining the three-dimensional structure of the base portion of the insole included in the shoe of the second modified example. Fig.13 , an insole 20C included in a shoe according to a second modified example of the first embodiment will be described.

[0154] When the insole 20C included in the shoe of the second modification is compared with the insole 20A included in the shoe 1A of the first embodiment, the difference in structure is only that the base portion 21 has a different three-dimensional structure.

[0155] Specifically, if Fig.13 As shown, the base portion 21 of the insole 20C included in the shoe of the second variant includes a three-dimensional mesh structure 2C, wherein the three-dimensional wall structure is set as a unit structure 3C and the unit structure 3C is repeatedly arranged in a plurality in an adjacent manner. More specifically, the plurality of unit structures 3C are repeatedly arranged regularly and continuously along the width direction (the X direction shown in the figure), the depth direction (the Y direction shown in the figure), and the height direction (the Z direction shown in the figure). Fig.13 In FIG. 1 , only five unit structures 3C adjacent to each other in the width direction and the depth direction are extracted and shown, and only two unit structures 3C adjacent to each other in the height direction are extracted and shown.

[0156] The unit structure 3C including the three-dimensional wall structure has a three-dimensional shape formed by a wall whose outer shape is defined by a pair of parallel planes. Here, the illustrated unit structure 3C includes a structure formed by increasing the thickness of a plurality of planes arranged in a mutually intersecting manner so as to have a cavity inside, specifically, a structure formed by increasing the thickness of an octet structure.

[0157] Here, even in the insole 20C included in the shoe of the second variant, the buffer portion SA including the three-dimensional network structure 2C is constructed in a manner that satisfies conditions 1-1 to 1-7 described in the first structural example, or conditions 2-1 to 2-7 described in the second structural example, or conditions 3-1 to 3-7 described in the third structural example, or conditions 4-1 to 4-7 described in the fourth structural example, so that shoes with appropriate functionality depending on different uses can be made.

[0158] In addition, as a unit structure 3C including a three-dimensional wall structure having a three-dimensional shape formed by a wall whose outer shape is defined by a pair of parallel planes, in addition to this, a structure represented by a cubic structure or a cubic octagonal structure, in which a plurality of planes arranged in a mutually intersecting manner so as to have a cavity inside are used as a reference and the thickness is increased.

[0159] <Implementation method 2>

[0160] Fig.14 2 is a perspective view of a shoe according to Embodiment 2. Fig.14 , the shoe 1B according to this embodiment will be described.

[0161] like Fig.14 As shown, the shoe 1B has a sole 11 as a footbed and an upper 14 located above the sole 11, and the sole 11 includes a sole body 12B and an outer sole 13. The sole body 12B is included in the shoe 1B instead of the midsole 12A included in the shoe 1A of the first embodiment. The shoe 1B of this embodiment does not include the insole 20A included in the shoe 1A of the first embodiment.

[0162] In the shoe 1B of this embodiment, the sole body 12B includes a shaped object made by a three-dimensional stacking method. As the three-dimensional stacking method, for example, a light forming method is used. More specifically, the sole body 12B includes Figure 7 The three-dimensional mesh structure 2A shown. As a result, the entire sole body 12B in the sole 11 as a shoe bed functions as a buffer portion SA including the three-dimensional mesh structure 2A. In addition, there is no particular limitation on the material of the sole body 12B, and it can be the same material as the insole 20A described in the first embodiment.

[0163] Here, in the shoe 1B of this embodiment, the buffer portion SA including the three-dimensional network structure 2A is also constructed in a manner that satisfies conditions 1-1 to 1-7 described in the first structural example, or conditions 2-1 to 2-7 described in the second structural example, or conditions 3-1 to 3-7 described in the third structural example, or conditions 4-1 to 4-7 described in the fourth structural example.

[0164] Therefore, even in the case of the shoe 1B of the present embodiment, the effects described in the first embodiment can be obtained, and a shoe having appropriate functionality can be obtained depending on the use.

[0165] <Implementation method 3>

[0166] Fig.15 This is a perspective view of the shoe according to the third embodiment. Fig.16 It is along Fig.15 The schematic cross-sectional view of the XVI-XVI line shown in FIG. Fig.17 yes Fig.15 The exploded view of the shoe shown below. Figures 15 to 17 , the shoe 1C of this embodiment is described.

[0167] like Figures 15 to 17 As shown, the shoe 1C is a sock-like shoe that covers the entire foot of the wearer (i.e., the part closer to the end side than the ankle), and includes a shell 30 and a vamp body 40. The shell 30 and the vamp body 40 both have a bag-like shape. The shoe 1C of this embodiment does not include the insole 20A included in the shoe 1A of the first embodiment.

[0168] The housing 30 includes a sole 31 and an outer vamp 32. The sole 31 has a substantially flat shape, and its lower surface constitutes the ground contact surface 15. The outer vamp 32 is erected from the periphery of the sole 31. An opening 33 is provided at the upper portion of the outer vamp 32.

[0169] The upper body 40 includes a bottom 41 and an inner vamp 42. The bottom 41 has a substantially flat shape, and its upper surface constitutes a support surface for supporting the sole of the wearer's foot when worn. The inner vamp 42 is erected from the periphery of the bottom 41. A shoe opening 16 for inserting the wearer's foot is provided on the upper portion of the inner vamp 42.

[0170] The upper body 40 is accommodated in the shell 30 in such a manner that its bottom 41 is arranged on the sole 31 of the shell 30 and the medial vamp 42 overlaps the lateral vamp 32 of the shell 30. Thus, in the shoe 1C, the footbed includes the sole 31 of the shell 30 and the bottom 41 of the upper body 40.

[0171] The upper body 40 is a part that contacts the wearer's foot, and therefore preferably includes a member that can be flexibly deformed, such as a woven fabric or a knitted fabric, a nonwoven fabric, a synthetic leather, a resin, etc. In particular, as described later, if a woven fabric or a knitted fabric, a nonwoven fabric, etc. of a heat-shrinkable synthetic fiber is used, a shoe upper body that fits the wearer's foot better can be made. In addition, as a heat-shrinkable synthetic fiber, for example, a synthetic fiber with polyester, polyurethane, etc. as a main component can be cited.

[0172] That is, in the case where the upper body 40 includes a woven or knitted fabric, a non-woven fabric, or the like of a synthetic fiber having heat shrinkability, it is formed into a bag shape in advance and heat-treated with a last to be described later inserted therein, thereby causing heat shrinkage due to the heating, whereby the upper body 40 changes shape while being in close contact with the forming surface of the last and maintains its changed shape.

[0173] Therefore, if a shoe last corresponding to the shape of the wearer's foot is prepared and the shoe last is used to shape the upper body 40, the upper body 40 that fits the wearer's foot can be manufactured. Furthermore, if the shoe last is used to perform a heat treatment in a state where the upper body 40 is assembled in the shell 30, the upper body 40 also fits the shell 30, and the fit can be further improved.

[0174] In the shoe 1C of this embodiment, the sole 31 includes a shaped object made by a three-dimensional stacking method. As the three-dimensional stacking method, for example, a light forming method is used. Here, the sole 31 in the housing 30 includes Figure 7 The three-dimensional mesh structure 2A shown. Thus, the sole 31 as a shoe bed functions as a cushioning portion SA including the three-dimensional mesh structure 2A. In addition, the material of the housing 30 is not particularly limited, and can be the same material as the insole 20A described in the first embodiment.

[0175] Here, in the shoe 1C of the present embodiment, the buffer portion SA including the three-dimensional network structure 2A is also constructed in a manner that satisfies conditions 1-1 to 1-7 described in the first structural example, or conditions 2-1 to 2-7 described in the second structural example, or conditions 3-1 to 3-7 described in the third structural example, or conditions 4-1 to 4-7 described in the fourth structural example.

[0176] Therefore, even in the case of the shoe 1C of this embodiment, the effects described in the first embodiment can be obtained, and a shoe having appropriate functionality can be obtained depending on the use.

[0177] <Overview of Disclosure Contents in Embodiments, etc.>

[0178] The characteristic structures disclosed in the above-mentioned embodiments and the like are summarized as follows.

[0179] [Note 1]

[0180] A shoe comprising a footbed that supports the sole of a wearer's foot and includes a ground contact surface,

[0181] The footbed includes: a forefoot portion, supporting the toe portion and the treading portion of the wearer's foot; a midfoot portion, supporting the non-treading portion of the wearer's foot; and a rearfoot portion, supporting the heel portion of the wearer's foot.

[0182] The front foot portion, the mid foot portion, and the rear foot portion are arranged in a continuous manner along the front-rear direction of the shoe.

[0183] When viewed in a direction perpendicular to the ground contact surface, the forefoot portion includes an inner forefoot portion and an outer forefoot portion divided by the center of the shoe.

[0184] When viewed in a direction perpendicular to the ground contact surface, the midfoot portion includes an inner foot side midfoot portion and an outer foot side midfoot portion divided by the center of the shoe.

[0185] When viewed in a direction perpendicular to the ground contact surface, the rear foot portion includes an inner foot side rear foot portion and an outer foot side rear foot portion divided by the center of the shoe.

[0186] The shoe bed includes a cushioning portion, the cushioning portion is arranged across the inner foot side forefoot portion, the outer foot side forefoot portion, the inner foot side midfoot portion, the outer foot side midfoot portion, the inner foot side rear foot portion, and the outer foot side rear foot portion, and includes a three-dimensional mesh structure in which a plurality of unit structures are repeatedly arranged in an adjacent manner.

[0187] The space factor of the buffer portion located at the inner foot side front foot portion is greater than the space factor of the buffer portion located at the outer foot side front foot portion.

[0188] The space factor of the buffer portion located at the inner foot side midfoot portion is greater than the space factor of the buffer portion located at the outer foot side midfoot portion,

[0189] The space factor of the buffer portion located at the inner foot side rear foot portion is greater than the space factor of the buffer portion located at the outer foot side rear foot portion,

[0190] The space factor of the cushioning portion located at the inner foot side forefoot portion is smaller than the space factor of the cushioning portion located at the inner foot side midfoot portion,

[0191] The space factor of the buffer portion located at the front foot portion on the outer foot side is smaller than the space factor of the buffer portion located at the midfoot portion on the outer foot side.

[0192] The space factor of the cushioning portion located at the inner foot side midfoot portion is equal to or smaller than the space factor of the cushioning portion located at the inner foot side rear foot portion,

[0193] The space factor of the cushioning portion at the portion located at the outer foot side midfoot portion is equal to or smaller than the space factor of the cushioning portion at the portion located at the outer foot side rear foot portion.

[0194] [Note 2]

[0195] A shoe comprising a footbed that supports the sole of a wearer's foot and includes a ground contact surface,

[0196] The footbed includes: a forefoot portion, supporting the toe portion and the treading portion of the wearer's foot; a midfoot portion, supporting the non-treading portion of the wearer's foot; and a rearfoot portion, supporting the heel portion of the wearer's foot.

[0197] The front foot portion, the mid foot portion, and the rear foot portion are arranged in a continuous manner along the front-rear direction of the shoe.

[0198] When viewed in a direction perpendicular to the ground contact surface, the forefoot portion includes an inner forefoot portion and an outer forefoot portion divided by the center of the shoe.

[0199] When viewed in a direction perpendicular to the ground contact surface, the midfoot portion includes an inner foot side midfoot portion and an outer foot side midfoot portion divided by the center of the shoe.

[0200] When viewed in a direction perpendicular to the ground contact surface, the rear foot portion includes an inner foot side rear foot portion and an outer foot side rear foot portion divided by the center of the shoe.

[0201] The shoe bed includes a cushioning portion, the cushioning portion is arranged across the inner foot side forefoot portion, the outer foot side forefoot portion, the inner foot side midfoot portion, the outer foot side midfoot portion, the inner foot side rear foot portion, and the outer foot side rear foot portion, and includes a three-dimensional mesh structure in which a plurality of unit structures are repeatedly arranged in an adjacent manner.

[0202] The space factor of the buffer portion located at the inner foot side front foot portion is greater than the space factor of the buffer portion located at the outer foot side front foot portion.

[0203] The space factor of the buffer portion located at the inner foot side midfoot portion is greater than the space factor of the buffer portion located at the outer foot side midfoot portion,

[0204] The space factor of the buffer portion located at the inner foot side rear foot portion is greater than the space factor of the buffer portion located at the outer foot side rear foot portion,

[0205] The space factor of the cushioning portion located at the inner foot side forefoot portion is equal to or greater than the space factor of the cushioning portion located at the inner foot side midfoot portion,

[0206] The space factor of the cushioning portion located at the front foot portion on the outer foot side is equal to or greater than the space factor of the cushioning portion located at the midfoot portion on the outer foot side,

[0207] The space factor of the cushioning portion located at the inner foot midfoot portion is greater than the space factor of the cushioning portion located at the inner foot rearfoot portion.

[0208] The space factor of the buffer portion located at the outer foot side midfoot portion is greater than the space factor of the buffer portion located at the outer foot side rear foot portion.

[0209] [Note 3]

[0210] A shoe comprising a footbed that supports the sole of a wearer's foot and includes a ground contact surface,

[0211] The footbed includes: a forefoot portion, supporting the toe portion and the treading portion of the wearer's foot; a midfoot portion, supporting the non-treading portion of the wearer's foot; and a rearfoot portion, supporting the heel portion of the wearer's foot.

[0212] The front foot portion, the mid foot portion, and the rear foot portion are arranged in a continuous manner along the front-rear direction of the shoe.

[0213] When viewed in a direction perpendicular to the ground contact surface, the forefoot portion includes an inner forefoot portion and an outer forefoot portion divided by the center of the shoe.

[0214] When viewed in a direction perpendicular to the ground contact surface, the midfoot portion includes an inner foot side midfoot portion and an outer foot side midfoot portion divided by the center of the shoe.

[0215] When viewed in a direction perpendicular to the ground contact surface, the rear foot portion includes an inner foot side rear foot portion and an outer foot side rear foot portion divided by the center of the shoe.

[0216] The shoe bed includes a cushioning portion, the cushioning portion is arranged across the inner foot side forefoot portion, the outer foot side forefoot portion, the inner foot side midfoot portion, the outer foot side midfoot portion, the inner foot side rear foot portion, and the outer foot side rear foot portion, and includes a three-dimensional mesh structure in which a plurality of unit structures are repeatedly arranged in an adjacent manner.

[0217] The space factor of the buffer portion located at the inner foot side forefoot portion is smaller than the space factor of the buffer portion located at the outer foot side forefoot portion.

[0218] The space factor of the buffer portion located at the inner foot side midfoot portion is smaller than the space factor of the buffer portion located at the outer foot side midfoot portion,

[0219] The space factor of the buffer portion located at the inner foot side rear foot portion is smaller than the space factor of the buffer portion located at the outer foot side rear foot portion.

[0220] The space factor of the cushioning portion located at the inner foot side forefoot portion is smaller than the space factor of the cushioning portion located at the inner foot side midfoot portion,

[0221] The space factor of the buffer portion located at the front foot portion on the outer foot side is smaller than the space factor of the buffer portion located at the midfoot portion on the outer foot side.

[0222] The space factor of the cushioning portion located at the inner foot side midfoot portion is equal to or smaller than the space factor of the cushioning portion located at the inner foot side rear foot portion,

[0223] The space factor of the cushioning portion at the portion located at the outer foot side midfoot portion is equal to or smaller than the space factor of the cushioning portion at the portion located at the outer foot side rear foot portion.

[0224] [Note 4]

[0225] A shoe comprising a footbed that supports the sole of a wearer's foot and includes a ground contact surface,

[0226] The footbed includes: a forefoot portion, supporting the toe portion and the treading portion of the wearer's foot; a midfoot portion, supporting the non-treading portion of the wearer's foot; and a rearfoot portion, supporting the heel portion of the wearer's foot.

[0227] The front foot portion, the mid foot portion, and the rear foot portion are arranged in a continuous manner along the front-rear direction of the shoe.

[0228] When viewed in a direction perpendicular to the ground contact surface, the forefoot portion includes an inner forefoot portion and an outer forefoot portion divided by the center of the shoe.

[0229] When viewed in a direction perpendicular to the ground contact surface, the midfoot portion includes an inner foot side midfoot portion and an outer foot side midfoot portion divided by the center of the shoe.

[0230] When viewed in a direction perpendicular to the ground contact surface, the rear foot portion includes an inner foot side rear foot portion and an outer foot side rear foot portion divided by the center of the shoe.

[0231] The shoe bed includes a cushioning portion, the cushioning portion is arranged across the inner foot side forefoot portion, the outer foot side forefoot portion, the inner foot side midfoot portion, the outer foot side midfoot portion, the inner foot side rear foot portion, and the outer foot side rear foot portion, and includes a three-dimensional mesh structure in which a plurality of unit structures are repeatedly arranged in an adjacent manner.

[0232] The space factor of the buffer portion located at the inner foot side forefoot portion is smaller than the space factor of the buffer portion located at the outer foot side forefoot portion.

[0233] The space factor of the buffer portion located at the inner foot side midfoot portion is smaller than the space factor of the buffer portion located at the outer foot side midfoot portion,

[0234] The space factor of the buffer portion located at the inner foot side rear foot portion is smaller than the space factor of the buffer portion located at the outer foot side rear foot portion.

[0235] The space factor of the cushioning portion located at the inner foot side forefoot portion is equal to or greater than the space factor of the cushioning portion located at the inner foot side midfoot portion,

[0236] The space factor of the cushioning portion located at the front foot portion on the outer foot side is equal to or greater than the space factor of the cushioning portion located at the midfoot portion on the outer foot side,

[0237] The space factor of the cushioning portion located at the inner foot midfoot portion is greater than the space factor of the cushioning portion located at the inner foot rearfoot portion.

[0238] The space factor of the buffer portion located at the outer foot side midfoot portion is greater than the space factor of the buffer portion located at the outer foot side rear foot portion.

[0239] [Note 5]

[0240] The shoe according to any one of Supplementary Notes 1 to 4, wherein the three-dimensional network structure has a three-dimensional lattice structure.

[0241] [Note 6]

[0242] The shoe according to any one of Supplementary Notes 1 to 4, wherein the three-dimensional network structure has a three-dimensional wall structure formed by walls whose outer shape is defined by a pair of parallel flat surfaces or curved surfaces.

[0243] [Note 7]

[0244] The shoe according to Supplementary Note 6, wherein the three-dimensional wall structure includes a structure in which a triply periodic minimal surface is used as a reference surface and a thickness is increased on the reference surface.

[0245] [Note 8]

[0246] The shoe according to Supplementary Note 6, wherein the three-dimensional wall structure includes a structure in which a plurality of planes arranged to intersect each other so as to have a cavity inside are used as a reference plane and the thickness of the reference plane is increased.

[0247] [Note 9]

[0248] The shoe according to any one of Supplementary Notes 1 to 8, wherein the cushioning portion includes a single shaped object formed by a three-dimensional lamination method.

[0249] [Note 10]

[0250] The shoe according to any one of Notes 1 to 9, wherein the footbed comprises a sole,

[0251] The sole includes the buffer portion.

[0252] [Note 11]

[0253] The shoe according to any one of Notes 1 to 9, wherein the shoe bed comprises a sole and an insole,

[0254] The insole includes the buffer portion.

[0255] <Other forms, etc.>

[0256] In the above-described embodiments, the uses of the shoes are specifically illustrated by examples of running shoes for walking using the heel-strike running method, mid-foot running method, forefoot running method, etc., or shoes used for specific competitive purposes represented by tennis, table tennis, basketball, etc., but the uses of the shoes (competitive, etc.) are not limited to these.

[0257] Although the embodiments of the present invention have been described, the embodiments disclosed this time should be considered as illustrative in all aspects and not restrictive. The scope of the present invention is indicated by the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims.

Claims

1. A shoe comprising a footbed supporting the sole of a wearer's foot and including a contact surface, The footbed comprises: The forefoot portion supports the toes and tread of the wearer's foot; the midfoot, the non-treading portion that supports the wearer’s foot; and a rear foot portion that supports the heel of the wearer's foot, The front foot portion, the mid foot portion, and the rear foot portion are arranged in a continuous manner along the front-rear direction of the shoe. When viewed in a direction perpendicular to the ground contact surface, the forefoot portion includes an inner forefoot portion and an outer forefoot portion divided by the center of the shoe. When viewed in a direction perpendicular to the ground contact surface, the midfoot portion includes an inner foot side midfoot portion and an outer foot side midfoot portion divided by the center of the shoe. When viewed in a direction perpendicular to the ground contact surface, the rear foot portion includes an inner foot side rear foot portion and an outer foot side rear foot portion divided by the center of the shoe. The shoe bed includes a cushioning portion, the cushioning portion is arranged across the inner foot side forefoot portion, the outer foot side forefoot portion, the inner foot side midfoot portion, the outer foot side midfoot portion, the inner foot side rear foot portion, and the outer foot side rear foot portion, and includes a three-dimensional mesh structure in which a plurality of unit structures are repeatedly arranged in an adjacent manner. The space factor of the buffer portion located at the inner foot side front foot portion is greater than the space factor of the buffer portion located at the outer foot side front foot portion. The space factor of the buffer portion located at the inner foot side midfoot portion is greater than the space factor of the buffer portion located at the outer foot side midfoot portion, The space factor of the buffer portion located at the inner foot side rear foot portion is greater than the space factor of the buffer portion located at the outer foot side rear foot portion, The space factor of the cushioning portion located at the inner foot side forefoot portion is smaller than the space factor of the cushioning portion located at the inner foot side midfoot portion, The space factor of the buffer portion located at the front foot portion on the outer foot side is smaller than the space factor of the buffer portion located at the midfoot portion on the outer foot side. The space factor of the cushioning portion located at the inner foot side midfoot portion is equal to or smaller than the space factor of the cushioning portion located at the inner foot side rear foot portion, The space factor of the cushioning portion at the portion located at the outer foot side midfoot portion is equal to or smaller than the space factor of the cushioning portion at the portion located at the outer foot side rear foot portion.

2. A shoe comprising a footbed supporting the sole of a wearer's foot and including a contact surface, The footbed comprises: The forefoot portion supports the toes and tread of the wearer's foot; the midfoot, the non-treading portion that supports the wearer’s foot; and a rear foot portion that supports the heel of the wearer's foot, The front foot portion, the mid foot portion, and the rear foot portion are arranged in a continuous manner along the front-rear direction of the shoe. When viewed in a direction perpendicular to the ground contact surface, the forefoot portion includes an inner forefoot portion and an outer forefoot portion divided by the center of the shoe. When viewed in a direction perpendicular to the ground contact surface, the midfoot portion includes an inner foot side midfoot portion and an outer foot side midfoot portion divided by the center of the shoe. When viewed in a direction perpendicular to the ground contact surface, the rear foot portion includes an inner foot side rear foot portion and an outer foot side rear foot portion divided by the center of the shoe. The shoe bed includes a cushioning portion, the cushioning portion is arranged across the inner foot side forefoot portion, the outer foot side forefoot portion, the inner foot side midfoot portion, the outer foot side midfoot portion, the inner foot side rear foot portion, and the outer foot side rear foot portion, and includes a three-dimensional mesh structure in which a plurality of unit structures are repeatedly arranged in an adjacent manner. The space factor of the buffer portion located at the inner foot side front foot portion is greater than the space factor of the buffer portion located at the outer foot side front foot portion. The space factor of the buffer portion located at the inner foot side midfoot portion is greater than the space factor of the buffer portion located at the outer foot side midfoot portion, The space factor of the buffer portion located at the inner foot side rear foot portion is greater than the space factor of the buffer portion located at the outer foot side rear foot portion, The space factor of the cushioning portion located at the inner foot side forefoot portion is equal to or greater than the space factor of the cushioning portion located at the inner foot side midfoot portion, The space factor of the cushioning portion located at the outer foot side front foot portion is equal to or greater than the space factor of the cushioning portion located at the outer foot side midfoot portion, The space factor of the cushioning portion located at the inner foot midfoot portion is greater than the space factor of the cushioning portion located at the inner foot rearfoot portion. The space factor of the buffer portion located at the outer foot side midfoot portion is greater than the space factor of the buffer portion located at the outer foot side rear foot portion.

3. A shoe comprising a footbed supporting the sole of a wearer's foot and including a contact patch, The footbed comprises: The forefoot portion supports the toes and tread of the wearer's foot; the midfoot, the non-treading portion that supports the wearer’s foot; and a rear foot portion that supports the heel of the wearer's foot, The front foot portion, the mid foot portion, and the rear foot portion are arranged in a continuous manner along the front-rear direction of the shoe. When viewed in a direction perpendicular to the ground contact surface, the forefoot portion includes an inner forefoot portion and an outer forefoot portion divided by the center of the shoe. When viewed in a direction perpendicular to the ground contact surface, the midfoot portion includes an inner foot side midfoot portion and an outer foot side midfoot portion divided by the center of the shoe. When viewed in a direction perpendicular to the ground contact surface, the rear foot portion includes an inner foot side rear foot portion and an outer foot side rear foot portion divided by the center of the shoe. The shoe bed includes a cushioning portion, the cushioning portion is arranged across the inner foot side forefoot portion, the outer foot side forefoot portion, the inner foot side midfoot portion, the outer foot side midfoot portion, the inner foot side rear foot portion, and the outer foot side rear foot portion, and includes a three-dimensional mesh structure in which a plurality of unit structures are repeatedly arranged in an adjacent manner. The space factor of the buffer portion located at the inner foot side forefoot portion is smaller than the space factor of the buffer portion located at the outer foot side forefoot portion. The space factor of the buffer portion located at the inner foot side midfoot portion is smaller than the space factor of the buffer portion located at the outer foot side midfoot portion, The space factor of the buffer portion located at the inner foot side rear foot portion is smaller than the space factor of the buffer portion located at the outer foot side rear foot portion. The space factor of the cushioning portion located at the inner foot side forefoot portion is smaller than the space factor of the cushioning portion located at the inner foot side midfoot portion, The space factor of the buffer portion located at the front foot portion on the outer foot side is smaller than the space factor of the buffer portion located at the midfoot portion on the outer foot side. The space factor of the cushioning portion located at the inner foot side midfoot portion is equal to or smaller than the space factor of the cushioning portion located at the inner foot side rear foot portion, The space factor of the cushioning portion at the portion located at the outer foot side midfoot portion is equal to or smaller than the space factor of the cushioning portion at the portion located at the outer foot side rear foot portion.

4. A shoe comprising a footbed supporting the sole of a wearer's foot and including a contact surface, The footbed comprises: The forefoot portion supports the toes and tread of the wearer's foot; the midfoot, the non-treading portion that supports the wearer’s foot; and a rear foot portion that supports the heel of the wearer's foot, The front foot portion, the mid foot portion, and the rear foot portion are arranged in a continuous manner along the front-rear direction of the shoe. When viewed in a direction perpendicular to the ground contact surface, the forefoot portion includes an inner forefoot portion and an outer forefoot portion divided by the center of the shoe. When viewed in a direction perpendicular to the ground contact surface, the midfoot portion includes an inner foot side midfoot portion and an outer foot side midfoot portion divided by the center of the shoe. When viewed in a direction perpendicular to the ground contact surface, the rear foot portion includes an inner foot side rear foot portion and an outer foot side rear foot portion divided by the center of the shoe. The shoe bed includes a cushioning portion, the cushioning portion is arranged across the inner foot side forefoot portion, the outer foot side forefoot portion, the inner foot side midfoot portion, the outer foot side midfoot portion, the inner foot side rear foot portion, and the outer foot side rear foot portion, and includes a three-dimensional mesh structure in which a plurality of unit structures are repeatedly arranged in an adjacent manner. The space factor of the buffer portion located at the inner foot side forefoot portion is smaller than the space factor of the buffer portion located at the outer foot side forefoot portion. The space factor of the buffer portion located at the inner foot side midfoot portion is smaller than the space factor of the buffer portion located at the outer foot side midfoot portion, The space factor of the buffer portion located at the inner foot side rear foot portion is smaller than the space factor of the buffer portion located at the outer foot side rear foot portion. The space factor of the cushioning portion located at the inner foot side forefoot portion is equal to or greater than the space factor of the cushioning portion located at the inner foot side midfoot portion, The space factor of the cushioning portion located at the outer foot side front foot portion is equal to or greater than the space factor of the cushioning portion located at the outer foot side midfoot portion, The space factor of the cushioning portion located at the inner foot midfoot portion is greater than the space factor of the cushioning portion located at the inner foot rearfoot portion. The space factor of the buffer portion located at the outer foot side midfoot portion is greater than the space factor of the buffer portion located at the outer foot side rear foot portion.

5. The shoe according to any one of claims 1 to 4, wherein: The three-dimensional network structure has a three-dimensional lattice structure.

6. The shoe according to any one of claims 1 to 4, wherein: The three-dimensional network structure has a three-dimensional wall structure formed by walls whose outer shape is defined by a pair of parallel flat surfaces or curved surfaces.

7. The shoe according to claim 6, wherein: The three-dimensional wall structure includes a structure in which a triply periodic minimal surface is used as a reference surface and a thickness is increased on the reference surface.

8. The shoe according to claim 6, wherein: The three-dimensional wall structure includes a structure in which a plurality of planes arranged to intersect each other so as to have a cavity inside are used as a reference plane and the thickness of the reference plane is increased.

9. The shoe according to any one of claims 1 to 4, wherein: The buffer portion includes a single structure formed by a three-dimensional layered structure method.

10. The shoe according to any one of claims 1 to 4, wherein: The footbed includes a sole, The sole includes the buffer portion.

11. The shoe according to any one of claims 1 to 4, wherein: The shoe bed includes a sole and an insole. The insole includes the buffer portion.

Images