Sole and shoe

Abstract

The present invention provides a sole and a shoe in which damage or performance degradation of a cushioning material is less likely to be induced by the intrusion of foreign matter even when a ground surface is formed of the cushioning material. The sole includes a cushioning material in at least a portion thereof, the cushioning material is formed of a single member, and includes a cushioning portion and a cover portion. The cover portion has a ground surface on a side opposite to a side on which the cushioning portion is present. In the cushioning portion, a plurality of through portions that penetrate the cushioning portion when viewed in a normal direction of the ground surface are provided, and the cover portion covers at least one or more of the through portions. In the cover portion, a communication path having one end that is open with respect to the through portion and the other end that is open at the ground surface is provided. In a case where a maximum imaginary circle is inscribed within an outline that traces an opening portion of the communication path on the ground surface side, when a diameter of the imaginary circle is set as R and a length of the communication path in a direction in which the communication path extends is set as L, a condition of R < L is satisfied.

Description

Technical Field

[0001] The present invention relates to a sole comprising a cushioning material for absorbing impact, and a shoe comprising said sole. Background Technology

[0002] Previously, various cushioning materials for shock absorption were known, and these materials were used according to their intended purpose. For example, in shoes, cushioning materials are sometimes placed in the sole to mitigate the impact generated upon landing. These cushioning materials in the sole are generally made of resin or rubber.

[0003] In recent years, shoes have been developed that incorporate a lattice or mesh structure in the sole, improving cushioning performance both materially and structurally. For example, U.S. Patent Publication No. 2018 / 0049514 discloses shoes with soles featuring a lattice structure.

[0004] On the other hand, Japanese Patent Publication No. 2017-527637 discloses that, as a three-dimensional object manufactured using a three-dimensional layering method, it is possible to manufacture an object on which a geometric surface structure such as a polyhedron with internal cavities or a triple-periodic minimal surface is added as a reference, and it discloses that by constructing the three-dimensional object with an elastic material, it can be applied to, for example, shoe soles. Summary of the Invention

[0005] Here, if we consider a scenario where, in order to reduce the amount of adhesive used, the cushioning material is not covered by an outsole, and instead forms all or part of the contact surface of the sole, then there is a concern that foreign objects, such as small stones, may enter the exposed surface of the cushioning material where the contact surface is defined, especially if there are holes or recesses. In the event of such foreign object intrusion, the foreign object may enter the interior of the cushioning material, potentially causing damage to the cushioning's cushioning properties or even breakage of the cushioning material itself.

[0006] Therefore, to prevent the aforementioned situation, it is considered to construct the exposed surface of the cushioning material from a plane or a smooth curved surface, but for manufacturing reasons, it is not uncommon for it to be constructed in this way. For example, when using a three-dimensional lamination method to manufacture the cushioning material, it is necessary to provide outlets for discharging uncured resin on the surface of the cushioning material, and therefore holes are provided at the ground surface.

[0007] Therefore, the present invention was made to solve the aforementioned problems, and its object is to provide a sole and a shoe including the sole, which are not easily damaged or have their performance reduced due to the intrusion of foreign objects, even when the entire or part of the contact surface is composed of cushioning material.

[0008] The sole of the shoe according to the first aspect of the present invention includes a cushioning material in at least a portion and is provided with a grounding surface. The cushioning material includes a cushioning portion comprising a three-dimensional structure, wherein the three-dimensional structure is formed by a three-dimensional shape of walls defined by a pair of parallel planes or curved surfaces as a unit structure, and a plurality of such unit structures are arranged regularly and continuously in at least one direction. The cushioning portion includes a plurality of through portions that penetrate the cushioning portion when viewed along the normal direction of the grounding surface. The cushioning material includes a cover portion that, when viewed along the normal direction of the grounding surface, corresponds to at least one of the plurality of through portions included in the cushioning portion and covers the through portions. The cushioning material is constituted by a single component formed by continuously connecting the cushioning portion and the cover portion. The grounding surface is defined by a main surface of the cover portion opposite to the side where the cushioning portion is located, and the cover portion includes a connecting path with one end open relative to the through portion and the other end open in the grounding surface. Regarding the sole based on the first aspect of the present invention, when a maximum imaginary circle is depicted that is inscribed within the outline of the opening of the connecting path on the side of the contact surface, the condition R < L is satisfied when the diameter of the imaginary circle is set to R and the length of the connecting path extending along the direction of the connecting path is set to L.

[0009] The sole according to the second aspect of the present invention includes a cushioning material in at least a portion and is provided with a contact surface. The cushioning material includes a cushioning portion comprising a three-dimensional structure, wherein the three-dimensional structure is a unit structure formed by walls whose shape is defined by a pair of parallel planes or curved surfaces, and multiple such unit structures are arranged regularly and continuously in at least one direction. The cushioning portion includes multiple through-sections that penetrate the cushioning portion when viewed along the normal direction of the contact surface. The cushioning material includes a cover portion that, when viewed along the normal direction of the contact surface, corresponds to at least one of the multiple through-sections included in the cushioning portion and covers the through-sections, and also includes a columnar portion connecting the cushioning portion and the cover portion. The cushioning material is constituted by a single component formed by continuously connecting the cushioning portion, the columnar portion, and the cover portion. The contact surface is defined by the main surface of the cover portion opposite to the side where the columnar portion is located. In the sole based on the second aspect of the present invention, the through portion communicates with the outside via a gap formed by the provision of the columnar portion and the cover portion.

[0010] The shoe based on the present invention includes: a sole based on the first or second embodiment of the present invention; and an upper disposed above the sole.

[0011] The above and other objects, features, solutions and advantages of the present invention will become apparent from the following detailed description relating to the invention, which is understood in conjunction with the accompanying drawings. Attached Figure Description

[0012] Figure 1 This is a perspective view of the sole of embodiment 1 and the shoe including the sole.

[0013] Figure 2 yes Figure 1 The image shows a side view of the shoe sole.

[0014] Figure 3 This is a perspective view of the cushioning material included in the sole of embodiment 1.

[0015] Figure 4A yes Figure 3 The bottom view shown is of the cushioning material with the cover removed.

[0016] Figure 4B yes Figure 3 The bottom view of the overall cushioning material shown.

[0017] Figure 5 yes Figure 3 The cross-sectional view of the cushioning material shown.

[0018] Figure 6 It means Figure 3 An enlarged cross-sectional view of the main part of the cushioning material shown.

[0019] Figure 7 This is an enlarged cross-sectional view showing the main part of the buffer material in the first modified example.

[0020] Figure 8 This is an enlarged cross-sectional view showing the main part of the buffer material in the second modified example.

[0021] Figure 9 This is an enlarged cross-sectional view showing the main part of the buffer material in the third modified example.

[0022] Figure 10 This is an enlarged cross-sectional view showing the main part of the buffer material in the fourth modified example.

[0023] Figure 11 This is an enlarged cross-sectional view showing the main part of the buffer material in the fifth modified example.

[0024] Figure 12 This is an enlarged cross-sectional view showing the main part of the buffer material in the sixth modified example.

[0025] Figure 13 This is an enlarged cross-sectional view showing the main part of the buffer material in the seventh modified example.

[0026] Figures 14A to 14E These are bottom views showing the main parts of the buffer material in the eighth to twelfth variations.

[0027] Figure 15A This is an enlarged cross-sectional view showing the main part of the buffer material in the thirteenth variation.

[0028] Figure 15B This is a plan view showing the main part of the buffer material in the thirteenth variation.

[0029] Figure 15C and Figure 15D This is a cross-sectional view showing the main part of the buffer material in the thirteenth variation.

[0030] Figure 15E This is a bottom view showing the main part of the buffer material in the thirteenth variation.

[0031] Figure 16 This is a three-dimensional view of the cushioning material in the fourteenth variation.

[0032] Figure 17 This is a three-dimensional view of the cushioning material in the fifteenth variation.

[0033] Figure 18 This is a three-dimensional view of the cushioning material in the sixteenth variation.

[0034] Figure 19 This is a perspective view of the cushioning material in Embodiment 2.

[0035] Figure 20 This is a perspective view of the cushioning material in Embodiment 3.

[0036] Figure 21 This is a perspective view of the cushioning material in embodiment 4.

[0037] Figure 22 This is a perspective view of the cushioning material in embodiment 5.

[0038] Figure 23A yes Figure 22 The bottom view shown is of the cushioning material with the cover removed.

[0039] Figure 23B yes Figure 22 The bottom view of the overall cushioning material shown.

[0040] Figure 24 yes Figure 22 The cross-sectional view of the cushioning material shown.

[0041] Figure 25 It means Figure 22 An enlarged cross-sectional view of the main part of the cushioning material shown.

[0042] Figure 26 This is a perspective view of the cushioning material according to embodiment 6.

[0043] Figure 27A yes Figure 26 The bottom view shown is of the cushioning material with the cover removed.

[0044] Figure 27B yes Figure 26 The bottom view of the overall cushioning material shown.

[0045] Figure 28 yes Figure 26 The cross-sectional view of the cushioning material shown.

[0046] Figure 29 It means Figure 26 An enlarged cross-sectional view of the main part of the cushioning material shown.

[0047] Figure 30 This is a perspective view of the cushioning material according to embodiment 7.

[0048] Figure 31A yes Figure 30 The bottom view shown is of the cushioning material with the cover removed.

[0049] Figure 31B yes Figure 30 The bottom view of the overall cushioning material shown.

[0050] Figure 32 yes Figure 30 The cross-sectional view of the cushioning material shown.

[0051] Figure 33 It means Figure 30 An enlarged cross-sectional view of the main part of the cushioning material shown.

[0052] Figure 34 This is a perspective view of the cushioning material according to embodiment 8.

[0053] Figure 35 This is a perspective view of the cushioning material according to embodiment 9.

[0054] Figure 36 This is a perspective view of the cushioning material in Embodiment 10. Detailed Implementation

[0055] Hereinafter, embodiments of the present invention will be described in detail with reference to the figures. Furthermore, in the embodiments shown below, the same or common parts are labeled with the same symbols in the figures, and their descriptions will not be repeated.

[0056] (Implementation Method 1)

[0057] Figure 1 This is a perspective view of the sole of embodiment 1 and a shoe including the sole. Figure 2 yes Figure 1 The image shows a side view of the shoe sole. First, refer to the... Figure 1 and Figure 2 The shoe 100 of this embodiment will be described.

[0058] like Figure 1 As shown, shoe 100 includes a sole 110 and an upper 120. The sole 110 is a component that covers the ball of the foot and has a generally flat shape. The upper 120 has a shape that covers at least the entire back side of the inserted foot and is located above the sole 110.

[0059] The upper 120 has an upper body 121, a shoe tongue 122, and shoelaces 123. The shoe tongue 122 and shoelaces 123 are both fixed or attached to the upper body 121.

[0060] The upper part of the upper body 121 has an upper opening that exposes the upper part of the ankle and part of the instep. On the other hand, the lower part of the upper body 121 has, for example, a lower opening covered by the sole 110, and for another example, a bottom is formed by sewing or the like at the lower end of the upper body 121.

[0061] The tongue 122 is fixed to the upper body 121 by sewing, welding, gluing, or a combination thereof, in order to cover the portion of the instep that is provided in the upper opening of the upper body 121 and expose a part of the instep. The upper body 121 and the tongue 122 are made of, for example, fabrics or knitted materials, non-woven fabrics, synthetic leather, resins, etc., and especially in shoes that require breathability or lightweight, double raschel warp-knitted fabrics incorporating polyester threads are used.

[0062] The shoelace 123 includes a strap-shaped member for pulling the periphery of the upper opening on the upper body 121, which exposes a portion of the instep, closer together in the foot width direction, and inserting it into a plurality of holes provided on the periphery of the upper opening. By tightening the shoelace 123 while the foot is inserted into the upper body 121, the upper body 121 can be made to fit snugly against the foot.

[0063] like Figure 1 and Figure 2As shown, the sole 110 has a midsole 111, an outsole 112, and a cushioning material 1A. The midsole 111 is located on the upper part of the sole 110 and is attached to the upper 120. The outsole 112 and the cushioning material 1A are both located on the lower part of the sole 110 and are attached to the midsole 111.

[0064] Here, as Figure 2 As shown, the sole 110 is divided along its long axis (front-to-back direction in the figure, left-to-right direction) in a top view into: a forefoot portion A1 supporting the toes and footrest of the wearer's foot, a midfoot portion A2 supporting the arch of the wearer's foot, and a rearfoot portion A3 supporting the heel of the wearer's foot. The midsole 111 extends along the front-to-back direction from the forefoot portion A1, through the midfoot portion A2, to the rearfoot portion A3. On the other hand, the outsole 112 is located on the front side of the forefoot portion A1 and the midfoot portion A2 in the front-to-back direction, and the cushioning material 1A is located on the rear side of the midfoot portion A2 and the rearfoot portion A3 in the front-to-back direction.

[0065] Thus, the outsole 112 and the cushioning material 1A are adjacent to each other in the front-to-back direction, and the outsole 112 and the cushioning material 1A constitute the contact surface of the sole 110. That is, the outsole 112 has a contact surface 112a at its lower end, and the contact surface 112a defines the contact surface from the forefoot portion A1 to the midfoot portion A2 of the sole 110 approximately to the center. On the other hand, the cushioning material 1A has a contact surface 22 at its lower end, and the contact surface 22 defines the contact surface from the midfoot portion A2 of the sole 110 approximately to the heel portion A3.

[0066] The midsole 111 is preferably of moderate strength and excellent cushioning. In this regard, the midsole 111 can be made of resin or rubber components, and is particularly suitable to be made of foamed or non-foamed materials such as polyolefin resin, ethylene-vinyl acetate (EVA), polyamide thermoplastic elastomer (thermoplastic polyamide (TPA), thermoplastic polyamide elastomer (TPAE)), thermoplastic polyurethane (TPU), and polyester thermoplastic elastomer (TPEE).

[0067] The outsole 112 is preferably made of rubber, which has excellent abrasion resistance or grip. In this regard, the outsole 112 may be made of rubber. In addition, in order to improve grip, the lower surface of the outsole 112, i.e., the contact surface 112a, may be given a tread pattern.

[0068] There are no particular limitations on the material of the cushioning material 1A. For example, it can be made of resin or rubber. Particularly suitable materials include polyolefin resin, ethylene-vinyl acetate copolymer (EVA), polyamide thermoplastic elastomer (TPA, TPAE), thermoplastic polyurethane (TPU), polyester thermoplastic elastomer (TPEE), butadiene rubber, etc. In addition, it can also be made of polymer compositions such as olefin polymers, amide polymers, ester polymers, urethane polymers, styrene polymers, acrylic polymers, etc.

[0069] In this embodiment of the shoe 100, a notch of a predetermined shape is provided in the midsole 111, and the cushioning material 1A is incorporated into the sole 110 by receiving the cushioning material 1A in the notch. The bonding of the cushioning material 1A to the midsole 111 can be achieved, for example, by adhesive bonding. On the other hand, the outsole 112 is assembled in such a way that it covers part or all of the lower surface of the midsole 111 except for the portion where the notch is provided. The bonding of the outsole 112 to the midsole 111 can be achieved, for example, by adhesive bonding.

[0070] Figure 3 yes Figure 1 A three-dimensional view of the cushioning material shown. Figure 4A and Figure 4B yes Figure 3 The bottom view of the cushioning section of the cushioning material shown. Figure 4A This is a bottom view of the cushioning material with the cover removed (i.e., a bottom view of the cushioning section). Figure 4B This is a bottom view of the entire cushioning material, including the buffer section and the cover section. Additionally, Figure 5 It is along Figure 4B The cross-sectional view of the VV line shown. Next, refer to the... Figures 3 to 5 The general structure of the buffer material 1A in this embodiment will be described.

[0071] like Figures 3 to 5 As shown, the cushioning material 1A includes a cushioning portion 10 and a cover portion 20. The cushioning portion 10 includes multiple unit structures U (see, in particular, reference to...). Figure 3The three-dimensional structure S. Multiple unit structures U each have a three-dimensional shape formed by walls 11 whose shape is defined by a pair of parallel geometric surfaces. On the other hand, the cover 20 has a generally plate-like shape and constitutes the ground surface 22. The cushioning material 1A is composed of a single component formed by continuously connecting the cushioning portion 10 and the cover 20.

[0072] Here, there are no particular limitations on the manufacturing method of the cushioning material 1A, but the cushioning material 1A can be manufactured, for example, by shaping using a three-dimensional lamination forming apparatus. When the cushioning material 1A is manufactured by shaping using the three-dimensional lamination forming apparatus, the material of the cushioning portion 10 is the same as the material of the cover portion 20. However, when using a three-dimensional lamination forming apparatus employing fused deposition molding (FDM), it is also possible to make the material of the cushioning portion 10 different from the material of the cover portion 20.

[0073] The material for the cushioning material 1A (i.e., the cushioning portion 10 and the cover portion 20) can be virtually any material as long as it is elastic, but as mentioned above, resin or rubber materials are preferred. More specifically, when the cushioning material 1A is made of resin, it can be, for example, polyolefin resin, ethylene-vinyl acetate copolymer (EVA), polyamide thermoplastic elastomer (TPA, TPAE), thermoplastic polyurethane (TPU), or polyester thermoplastic elastomer (TPEE). On the other hand, when the cushioning material 1A is made of rubber, it can be, for example, butadiene rubber.

[0074] The cushioning material 1A may also be composed of a polymer composition. In this case, the polymer contained in the polymer composition may include, for example, olefin polymers such as olefin elastomers or olefin resins. Examples of olefin polymers include polyethylene (e.g., linear low-density polyethylene (LLDPE), high-density polyethylene (HDPE), etc.), polypropylene, ethylene-propylene copolymer, propylene-1-hexene copolymer, propylene-4-methyl-1-pentene copolymer, propylene-1-butene copolymer, ethylene-1-hexene copolymer, ethylene-4-methyl-pentene copolymer, ethylene-1-butene copolymer, 1-butene-1-hexene copolymer, 1-butene-4-methyl-pentene, ethylene-methacrylate copolymer, ethylene-methyl methacrylate copolymer, and ethylene-ethyl methacrylate copolymer. Ethylene-butyl methacrylate copolymer, ethylene-methyl acrylate copolymer, ethylene-ethyl acrylate copolymer, ethylene-butyl acrylate copolymer, propylene-methacrylic acid copolymer, propylene-methyl methacrylate copolymer, propylene-ethyl methacrylate copolymer, propylene-butyl methacrylate copolymer, propylene-methyl acrylate copolymer, propylene-ethyl acrylate copolymer, propylene-butyl acrylate copolymer, ethylene-vinyl acetate copolymer (EVA), polyolefins of propylene-vinyl acetate copolymer, etc.

[0075] Alternatively, the polymer may also be an amide-based polymer, such as an amide elastomer or an amide-based resin. Examples of amide-based polymers include polyamide 6, polyamide 11, polyamide 12, polyamide 66, and polyamide 610.

[0076] Alternatively, the polymer may also be an ester-based polymer, such as an ester-based elastomer or an ester-based resin. Examples of ester-based polymers include polyethylene terephthalate and polybutylene terephthalate.

[0077] Alternatively, the polymer may be a urethane elastomer or a urethane resin, or other urethane polymer. Examples of urethane polymers include polyester-based polyurethanes and polyether-based polyurethanes.

[0078] Alternatively, the polymer may also be a styrene-based elastomer or a styrene-based resin, or other styrene-based polymer. Examples of styrene-based elastomers include styrene-ethylene-butylene copolymer (SEB), styrene-butadiene-styrene copolymer (SBS), hydrides of SBS (styrene-ethylene-butylene-styrene copolymer (SEBS)), styrene-isoprene-styrene copolymer (SIS), and hydrides of SIS (styrene-ethylene-butadiene-styrene copolymer (SEBS)). Examples of styrene-based resins include propylene-ethylene-propylene-styrene copolymers (SEPS), styrene-isobutylene-styrene copolymers (SIBS), styrene-butadiene-styrene-butadiene copolymers (SBSB), and styrene-butadiene-styrene-butadiene-styrene copolymers (SBSBS). Other styrene-based resins include polystyrene, acrylonitrile-styrene (AS), and acrylonitrile-butadiene-styrene (ABS).

[0079] In addition, the polymer may also be, for example, acrylic polymers such as polymethyl methacrylate, urethane acrylic polymers, polyester acrylic polymers, polyether acrylic polymers, polycarbonate acrylic polymers, epoxy acrylic polymers, conjugated diene polymers and their hydrides, urethane methacrylic polymers, polyester methacrylic polymers, polyether methacrylic polymers, polycarbonate methacrylic polymers, epoxy methacrylic polymers, conjugated diene polymers and their hydrides, polyvinyl chloride resins, silicone elastomers, butadiene rubber (BR), isoprene rubber (IR), chloroprene rubber (CR), natural rubber (NR), styrene butadiene rubber (SBR), acrylonitrile butadiene rubber (NBR), and isobutylene isoprene rubber (IIR), etc.

[0080] like Figure 3 and Figure 5 As shown, the buffer portion 10 and the cover portion 20 are stacked along the normal direction of the ground surface 22 provided on the cover portion 20. Thus, the bottom surface of the buffer portion 10 is covered by the cover portion 20, and the buffer portion 10 is located above the cover portion 20.

[0081] Here, Figures 3 to 5 It is Figure 1 The diagram shows a portion of the buffer material 1A cut out and subjected to the following action. Figure 3 In the text, oblique lines are marked on its cross-section. Additionally, in... Figure 3 For ease of understanding, the reference symbol U is not strictly labeled onto the unit structure, but rather onto the cuboid-shaped unit space that occupies the space of the unit structure.

[0082] Multiple unit structures U are arranged in a regular and continuous manner along the width, depth, and height directions. For example... Figure 3 As shown, in the cut-out portion of the buffer material 1A, four unit structures U are arranged in the width direction (X direction) and the depth direction (Y direction), and one unit structure U is arranged in the height direction (Z direction). Furthermore, there is no particular limitation on the number of repetitions of unit structures U in the width, depth, and height directions, as long as two or more are arranged along at least one of the three directions.

[0083] The buffer material 1A in this embodiment is intended to provide a buffering function in the height direction (Z direction shown in the figure). Therefore, the direction in which the buffer material 1A bears the load and provides the buffering function is consistent with the height direction. Furthermore, the height direction is the same as the normal direction of the ground surface 22 of the cover 20.

[0084] As described above, each of the multiple unit structures U has a three-dimensional shape formed by the wall 11. Therefore, by continuously connecting the multiple unit structures U to each other, the three-dimensional structure S is also composed of the assembly of the walls 11.

[0085] Here, the three-dimensional structure S included in the cushioning material 1A has a structure formed by taking a geometric surface structure as a reference and adding thickness to it. In the cushioning material 1A of this embodiment, the surface structure is a Schwarz P structure, which is a type of triple-periodic minimal surface defined mathematically. Furthermore, a minimal surface is defined as the surface with the smallest area among surfaces having a given closed curve at its boundary.

[0086] like Figure 5 As shown, regarding a three-dimensional structure S formed by using the Schwarz P structure as a reference and adding thickness to it, when it is cut along a specific plane, wall 11 exhibits a serpentine cross-sectional shape. The specific plane is, for example, in... Figure 4B A plane perpendicular to the paper and parallel to the VV line. With a wall 11 having a serpentine cross-sectional shape, multiple through-holes exist in the buffer portion 10 of the buffer material 1A. Here, a through-hole refers to a portion that penetrates the buffer portion 10 without being obstructed by the wall 11 when viewed along a predetermined direction.

[0087] There are six types of through-parts in the three-dimensional structure S: two types extending along the width direction, two types extending along the depth direction, and two types extending along the height direction. However, here, the focus is on... Figure 5 The cross-section shown shows a first through hole 12 and a second through hole 13 extending along the height direction (i.e., the Z direction).

[0088] like Figure 4A and Figure 5 As shown, the first through section 12 is located in Figure 3 The buffer portion 10 extends through the inner side of the generally cylindrical unit structure U, along the central axis of the generally cylindrical unit structure U, in the height direction. On the other hand, the second through portion 13 is located... Figure 3 The outer side of the generally cylindrical unit structure U shown has a buffer section 10 that extends through it in the height direction between it and other adjacent unit structures.

[0089] That is, the first through portion 12 and the second through portion 13 both have the common feature of penetrating the buffer portion 10 when viewed along the normal direction of the ground surface 22, but they differ in the location of their formation and the shape of the wall 11 that defines them.

[0090] Here, as Figure 4A As shown, on the bottom surface of the buffer section 10, a plurality of first opening ends 12a, which are circular in shape and separated from each other in plan view, exist in a matrix-like manner, passing through each of the plurality of first through sections 12 along the normal direction of the ground surface 22. Additionally, on the bottom surface of the buffer section 10, second opening ends, which are approximately lattice-shaped in plan view, exist in a manner surrounding the plurality of first opening ends 12a, and these second opening ends pass through each of the plurality of second through sections 13 along the normal direction of the ground surface 22.

[0091] like Figure 3 , Figure 4B and Figure 5 As shown, the cover 20 covers the bottom surface of the buffer portion 10 and has a connecting surface 21 connected to the buffer portion 10 (see especially). Figure 5 The cover 20 also includes a ground surface 22 located on the side opposite to the connecting surface 21. Furthermore, the cover 20 has a plurality of through-hole-shaped connecting passages 23 arranged in a matrix. These multiple connecting passages 23 are necessary for manufacturing purposes when using the three-dimensional lamination forming method to manufacture the cushioning material 1A; specifically, they serve as outlets for discharging uncured resin.

[0092] like Figure 4B and Figure 5 As shown, multiple connecting passages 23 are configured corresponding to multiple first opening ends 12a provided on the bottom surface of the buffer section 10. Each of the multiple connecting passages 23 has one end open relative to the corresponding first through section 12, and the other end open at the ground surface 22. Therefore, the space inside the buffer section 10 is connected to the outside via the multiple connecting passages 23, thereby enabling the discharge of uncured resin during manufacturing.

[0093] However, with the plurality of connecting passages 23 exposed at the ground surface 22, there is a concern that foreign objects such as small stones may intrude into the connecting passages 23 without any design modifications, potentially causing damage to the cushioning material or even breakage of the cushioning material itself. That is, although the entire area of ​​the second opening end is covered by the cover 20, the first opening end 12a is not completely covered by the cover 20, thus requiring a solution to this problem.

[0094] In this regard, the problem is solved in the buffer material 1A of this embodiment by designing the shape of the plurality of connecting paths 23. Hereinafter, refer to... Figure 6 and the aforementioned Figures 3 to 5This will be explained in detail. Furthermore, Figure 6 yes Figure 5 The enlarged cross-sectional view of region VI shown.

[0095] like Figures 3 to 6 As shown, in the buffer material 1A of this embodiment, each of the plurality of connecting passages 23 has a cylindrical through-hole shape extending along the normal direction of the ground surface 22, and the size of each of the plurality of connecting passages 23 is configured to be smaller than the size of the corresponding first opening end 12a. That is, the buffer-side opening 23a and the ground surface-side opening 23b of the connecting passage 23 (both refer to...) Figure 6 The buffer portion has a circular shape of the same size, and the opening 23a on the side of the buffer portion is smaller than the size of the first opening end 12a. Therefore, a portion of each of the plurality of first opening ends 12a is covered by the cover portion 20.

[0096] Therefore, even if a foreign object is smaller than the first opening end 12a, its intrusion can be effectively suppressed as long as the size of the foreign object is larger than the connecting passage 23. In this regard, based on the viewpoint of reliably expelling the uncured resin during manufacturing, and the viewpoint that if the foreign object is sufficiently fine, even if it intrudes into the interior of the buffer material 1A, it is unlikely to cause the performance degradation or damage described above, the diameter of the connecting passage 23 is preferably set to 0.8 mm or more and 4.5 mm or less, more preferably 1.4 mm or more and 4.0 mm or less.

[0097] However, in such a configuration, it is impossible to prevent the intrusion of foreign objects with a diameter smaller than that of the connecting path 23, and it is also impossible to completely rule out the possibility of performance degradation or damage.

[0098] Regarding this aspect, such as Figure 6 As shown, in the buffer material 1A of this embodiment, the diameter of the ground-side opening 23b of the connecting path 23 is set to R, and the length of the connecting path 23 extending along the direction of the connecting path 23 is set to L (the length L is equivalent to...). Figure 6 When the axis length of the connected path 23 represented by a single-dot dash is given, the condition R < L is satisfied.

[0099] By constructing it in this way, if we consider that the fine sand particles 200 are assumed to be substantially spherical, then even if the foreign object 200 intrudes into the connecting passage 23, it will remain near the ground-side opening 23b in the connecting passage 23, thus preventing it from immediately moving towards the buffer-side opening 23a and reaching the interior of the buffer section 10.

[0100] Therefore, by providing a sole 110 with a cushioning material 1A having this structure and a shoe 100 including the sole 110, it is possible to prevent damage or performance degradation of the cushioning material 1A caused by the intrusion of foreign objects 200.

[0101] Here, the diameter R of the ground-side opening 23b and the length L of the connecting path 23 preferably satisfy the condition 1.0 < L / R ≤ 10.0, more preferably 1.1 ≤ L / R ≤ 2.5. This is because, although it also depends on the material of the cover 20, the weight of the cushioning material 1A will increase if L / R exceeds 10.0, thus making the shoe 100 heavier.

[0102] (First to Seventh Modifications)

[0103] Figures 7 to 13 These are enlarged cross-sectional views showing the main parts of the buffer material in the first to seventh modified examples. Hereinafter, refer to the... Figures 7 to 10 The buffer materials 1A1 to 1A7 based on the first to seventh modifications of Embodiment 1 will be described.

[0104] In Embodiment 1, an example is shown where the connecting passage 23 provided on the cover 20 is a cylindrical through-hole extending in the normal direction of the ground surface 22, but the shape of the connecting passage 23 can be modified in various ways. The first to seventh modifications shown below illustrate the application of this modification to the buffer material 1A. Furthermore, in the buffer materials 1A1 to 1A7 of the first to seventh modifications, the same configuration as in Embodiment 1 is used, where the diameter R of the ground surface side opening 23b and the length L of the connecting passage 23 satisfy the condition R < L.

[0105] like Figure 7 As shown, in the first modified example, the buffer material 1A1 gradually reduces the diameter of the cross-sectional area of ​​the connecting passage 23 as it moves from the ground surface 22 side toward the connecting surface 21 side (i.e., the first through portion 12 side). With this configuration, the size of the buffer-side opening 23a becomes smaller than the size of the ground surface-side opening 23b of the connecting passage 23. Therefore, by this configuration, the movement of foreign objects intruding into the connecting passage 23 toward the buffer-side opening 23a side can be effectively suppressed.

[0106] like Figure 8 As shown, in the second modified example, the cross-sectional area of ​​the connecting passage 23 gradually decreases from the side of the connecting surface 21 (i.e., the side of the first through portion 12) towards the side of the ground surface 22, thus gradually reducing the diameter of the cross-sectional shape of the connecting passage 23. With this configuration, the size of the opening 23b on the ground surface side of the connecting passage 23 becomes smaller than the size of the opening 23a on the buffer portion side. Therefore, by configuring it in this way, the intrusion of foreign objects into the connecting passage 23 can be more effectively suppressed.

[0107] like Figure 9As shown, in the third variation, the buffer material 1A3 has a plurality of protrusions 23c protruding inward on the wall surface defining the connecting passage 23. In this configuration, the protrusions 23c function as stops to prevent foreign objects that have entered the connecting passage 23 from moving toward the buffer section opening 23a, thereby effectively suppressing foreign objects from reaching the interior of the buffer section 10.

[0108] like Figure 10 As shown, in the fourth modified example, the buffer material 1A4 is inclined such that the connecting path 23 extends in a direction intersecting the normal direction of the ground surface 22. With this configuration, the length L of the connecting path 23 can be increased without increasing the thickness of the cover 20. Therefore, with this configuration, the performance degradation or breakage of the buffer material can be prevented without increasing its weight.

[0109] like Figure 11 As shown, in the fifth variation, the buffer material 1A5 is inclined and further bent such that the connecting path 23 extends in a direction intersecting the normal direction of the ground surface 22. With this configuration, similar to the fourth variation, the length L of the connecting path 23 can be increased without increasing the thickness of the cover 20. Therefore, with this configuration, the performance degradation or breakage of the buffer material can be prevented without increasing its weight.

[0110] Here, when the connecting path 23 is bent as in the fifth variation, such as the buffer material 1A5, the length of the trajectory formed by the central portion of the connecting path 23 on a cross-section orthogonal to the extending direction of the connecting path 23 is the length L of the connecting path 23. That is, Figure 11 The sum of lengths L1 and L2 shown is the length L of the connecting path 23.

[0111] like Figure 12 As shown, in the sixth modification, the buffer material 1A6 bends the connecting path 23 multiple times in a crank shape, such that the connecting path 23 includes a portion extending in a direction intersecting the normal direction of the ground surface 22. With this configuration, similar to the fourth modification, the length L of the connecting path 23 can be increased without increasing the thickness of the cover 20. Therefore, with this configuration, the performance degradation or breakage of the buffer material can be prevented without increasing its weight.

[0112] Here, when the connecting path 23 is bent multiple times, as in the buffer material 1A6 of the sixth variation, the length of the trajectory formed by the central portion of the connecting path 23 on a cross-section orthogonal to the extending direction of the connecting path 23 is also the length L of the connecting path 23. That is, Figure 12 The sum of lengths L1, L2, and L3 shown is the length L of the connecting path 23.

[0113] Furthermore, in the buffer material 1A6 of this sixth modification, by bending the connecting path 23 multiple times as described above, the buffer-side opening 23a and the ground-side opening 23b are configured so that they do not overlap when viewed along the normal direction of the ground-side surface 22. With such a configuration, by forming a labyrinth with the connecting path 23, foreign objects can be effectively prevented from reaching the interior of the buffer section 10.

[0114] like Figure 13 As shown, in the seventh variation, the buffer material 1A7 bends the connecting path 23 so that it extends in a direction intersecting the normal direction of the ground surface 22. With this configuration, similar to the fourth variation, the length L of the connecting path 23 can be increased without increasing the thickness of the cover 20. Therefore, with this configuration, the performance degradation or breakage of the buffer material can be prevented without increasing its weight.

[0115] Furthermore, when the connecting path 23 is bent as in the buffer material 1A7 of the seventh variation, the length of the trajectory formed by connecting the central part of the connecting path 23 on the cross section orthogonal to the extension direction of the connecting path 23 (i.e., the length of the part represented by the single-dot dashed line in the figure) is also the length L of the connecting path 23.

[0116] (Variations 8 through 12)

[0117] Figures 14A to 14E These are bottom views showing the main parts of the cushioning material in the eighth to twelfth modifications. Hereinafter, referring to the... Figures 14A to 14E The cushioning materials 1A8 to 1A12 of the eighth to twelfth modifications of Embodiment 1 will be described.

[0118] In the first embodiment, an example is shown where the connecting passage 23 provided in the cover portion 20 is a through hole with a circular shape when viewed from above. However, the opening shape of the connecting passage 23 when viewed from above can be modified in various ways. The eighth to twelfth modifications shown below illustrate the application of such modifications to the buffer material 1A.

[0119] Here, as mentioned above, from the viewpoint of reliably discharging the uncured resin produced during manufacturing, the larger the opening area of ​​the connecting passage 23, the better. On the other hand, from the viewpoint of preventing the intrusion of foreign objects, if we consider that the fine sand particles conceived as foreign objects are substantially spherical as described above, then the smaller the width of the connecting passage 23, the better. In order to take both of the above into account, in the eighth to twelfth modifications shown below, the opening shape of the connecting passage 23 when viewed from above is set to a non-circular shape.

[0120] like Figure 14AAs shown, in the eighth modified example, the buffer material 1A8 forms the opening shape of the connecting path 23 into a cross shape when viewed from above. That is, the opening shape of the buffer-side opening 23a and the opening shape of the ground-side opening 23b of the connecting path 23 are both cross-shaped. In addition, the opening shape of the connecting path 23 on the cross section orthogonal to the direction of extension of the connecting path 23 is also cross-shaped at any position.

[0121] like Figure 14B As shown, in the ninth modified example, the buffer material 1A9 has an asterisk-shaped opening of the connecting path 23. That is, the opening shape of the buffer-side opening 23a and the opening shape of the ground-side opening 23b of the connecting path 23 are both asterisk-shaped. In addition, the opening shape of the connecting path 23 on the cross-section orthogonal to the direction in which the connecting path 23 extends is also asterisk-shaped at any position.

[0122] like Figure 14C As shown, in the tenth modification, the buffer material 1A10 has an H-shaped opening of the connecting path 23. That is, the opening shape of the buffer-side opening 23a and the opening shape of the ground-side opening 23b of the connecting path 23 are both H-shaped. In addition, the opening shape of the connecting path 23 on the cross-section orthogonal to the direction of extension of the connecting path 23 is also H-shaped at any position.

[0123] like Figure 14D As shown, in the eleventh modification, the buffer material 1A11 has a pentagonal star shape for the opening of the connecting path 23. That is, the opening shape of the buffer-side opening 23a and the opening shape of the ground-side opening 23b of the connecting path 23 are both pentagonal stars. In addition, the opening shape of the connecting path 23 on the cross-section orthogonal to the direction in which the connecting path 23 extends is also pentagonal star at any position.

[0124] like Figure 14E As shown, in the twelfth variation, the buffer material 1A12 has an opening shape of the connecting path 23 that is designed with a lightning bolt pattern. That is, the opening shape of the buffer-side opening 23a and the opening shape of the ground-side opening 23b of the connecting path 23 are both the lightning bolt pattern design. In addition, the opening shape of the connecting path 23 on the cross-section orthogonal to the direction in which the connecting path 23 extends is also the lightning bolt pattern design at any position.

[0125] Here, in the buffer materials 1A8 to 1A12 of the eighth to twelfth modifications, the configuration is such that, in the case of the largest imaginary circle VC inscribed in the outline of the connecting path 23 on a cross section orthogonal to the extension direction of the connecting path 23 (in the figure, the imaginary circle VC is represented by a two-dot dashed line), the diameter R of the imaginary circle and the length L of the connecting path 23 satisfy the condition R < L.

[0126] Therefore, in the configuration as described in the eighth to twelfth modifications, the opening area of ​​the connecting passage 23 can be increased while the width of the connecting passage 23 can be reduced in at least one direction on a cross-section orthogonal to the extending direction of the connecting passage 23. Thus, by configuring it in this way, a cushioning material can be manufactured that reliably discharges uncured resin during manufacturing while simultaneously suppressing the intrusion of foreign matter into the cushioning section 10.

[0127] Furthermore, in the buffer material 1A of Embodiment 1, the opening shape of the connecting path 23 is circular. However, in this case, the imaginary circle VC completely coincides with the outline of the circular connecting path 23. Therefore, in the buffer material 1A of Embodiment 1, the same conditions as those satisfied by the buffer materials 1A8 to 1A12 of the eighth to twelfth modifications are still met.

[0128] (Thirteenth variation)

[0129] Figures 15A to 15E These are enlarged cross-sectional views, plan views, and bottom views showing the main components of the cushioning material in the thirteenth variation. More specifically, Figure 15A It is an enlarged cross-sectional view of the section with connecting paths. Figure 15B This is a plan view of the enclosure containing the connecting passage. Additionally, Figure 15C and Figure 15D They are along Figure 15A The cross-sectional views of the XVC-XVC line and the XVD-XVD line are shown. Figure 15E This is a bottom view of the cover 20, which has a connecting passage. Hereinafter, referring to the description... Figures 15A to 15E The buffer material 1A13 based on the thirteenth variation of Embodiment 1 will be described.

[0130] In Embodiment 1 and the eighth to twelfth modifications, examples are shown where the opening shape of the buffer-side opening 23a and the ground-side opening 23b of the connecting passage 23 on the cover 20 are both set to the same shape, and the opening shape of the connecting passage 23 on the cross-section orthogonal to the direction in which the connecting passage 23 extends is also set to the same shape as the opening shape of the buffer-side opening 23a. However, it is also possible to configure the opening shape to change. The thirteenth modification shown below illustrates the case where such a change is applied to the buffer material 1A.

[0131] like Figures 15A to 15EAs shown, in the thirteenth variation of the buffer material 1A13, the opening shape of the buffer-side opening 23a of the connecting path 23 is set to a circular shape when viewed from above, and the opening shape of the ground-side opening 23b of the connecting path 23 is set to a cross shape when viewed from above. The connecting path 23 connecting the buffer-side opening 23a and the ground-side opening 23b is set to a shape that gently connects the buffer-side opening 23a and the ground-side opening 23b.

[0132] Here, if we consider the intrusion of foreign objects from the ground-side opening 23b of the connecting passage 23, then while increasing the opening area of ​​the connecting passage 23, we can reduce the width of the connecting passage 23. In this case, it is sufficient to configure it as follows: when a maximum imaginary circle VC is drawn that is inscribed within the outline of the ground-side opening 23b (the imaginary circle VC is within...) Figure 15E (represented by a dashed line between two points), the diameter R of the imaginary circle and the length L of the connecting path 23 satisfy the condition R < L.

[0133] By constructing it in this way, uncured resin from the manufacturing process can be reliably discharged, while foreign matter can be effectively prevented from entering the buffer section 10.

[0134] (Example 14)

[0135] Figure 16 This is a perspective view of the cushioning material in the fourteenth variation. Hereinafter, refer to the description... Figure 16 The buffer material 1A14 based on the fourteenth variation of Embodiment 1 will be described. Furthermore, in the buffer material 1A14 of this fourteenth variation, it is also configured in the same way as in Embodiment 1: the diameter R of the ground surface opening 23b and the length L of the connecting path 23 satisfy the condition R < L.

[0136] like Figure 16 As shown, in the cushioning material 1A14 of the fourteenth modification, a plurality of intersecting grooves 24 are provided on the contact surface 22 of the cover portion 20. The plurality of grooves 24 are equivalent to a pattern to improve grip.

[0137] Here, the ground-side openings 23b of the plurality of connecting paths 23 are disposed inside the plurality of slots 24 so that the portions of the plurality of slots 24 are exposed to the outside. More specifically, in this fourteenth variation, the plurality of slots 24 are arranged in a grid pattern, and connecting paths 23 are disposed at the intersections of the plurality of slots 24.

[0138] In this configuration, the ground-side opening 23b of the connecting path 23 is positioned further inward than the ground surface 22. This increases the distance from the ground surface 22 to the ground-side opening 23a, thus further suppressing the intrusion of foreign objects. Furthermore, the shape of the pattern when a pattern is provided on the ground surface 22 of the cover 20 can be varied.

[0139] Furthermore, when a groove or recess is provided on the ground surface of the cover as in the fourteenth variation, and a connecting passage is provided on its bottom surface, the groove or recess also becomes part of the path for foreign objects to reach the buffer section from the ground surface. Therefore, in such a configuration, the diameter R of the imaginary circle is defined as the ground surface-side opening provided on the bottom surface of the groove or recess, and the length L of the connecting passage is defined as the sum of the depth of the groove or recess and the actual length of the connecting passage.

[0140] (Example 15)

[0141] Figure 17 This is a perspective view of the cushioning material in the fifteenth variation. Hereinafter, refer to the description... Figure 17 The cushioning material 1A15 based on the fifteenth variation of Embodiment 1 will be described. Furthermore, in the cushioning material 1A15 of this fifteenth variation, it is also configured in the same way as in Embodiment 1: the diameter R of the ground surface opening 23b and the length L of the connecting path 23 satisfy the condition R < L.

[0142] like Figure 17 As shown, in the fifteenth modification, the cushioning material 1A15 includes a cushioning portion 10 and a cover portion 20, as well as an auxiliary mounting portion 25. The auxiliary mounting portion 25 includes a part with the same shape as the cover portion 20, and although it is not in... Figure 17 It is shown in the middle, but it is a generally plate-shaped part with multiple through holes of the same shape and layout as the connecting path 23 of the cover part 20.

[0143] Here, the auxiliary mounting part 25 is positioned on the side opposite to the cover 20 when viewed from the buffer part 10, and is stacked on the buffer part 10 along the normal direction of the ground surface 22 provided on the cover 20. Thus, the top surface of the buffer part 10 is covered by the auxiliary mounting part 25, and the buffer part 10 is located below the auxiliary mounting part 25. Furthermore, the buffer material 1A is constituted as a single component formed by continuously connecting the buffer part 10, the cover 20, and the auxiliary mounting part 25.

[0144] The auxiliary mounting portion 25 is used to fix the cushioning material 1A14 to the midsole 111 by adhesive or the like, and is provided to cover the top surface of the cushioning portion 10 in order to increase the bonding area. Here, by providing a plurality of through-hole shaped portions in the auxiliary mounting portion 25 as described above, the bonding strength can be improved compared to not providing such portions. In addition, if protrusions are provided in the midsole 111 corresponding to each of the plurality of through-hole shaped portions, the cushioning material 1A14 can be easily positioned when fixed relative to the midsole 111.

[0145] (Sixteenth variation)

[0146] Figure 18 This is a perspective view of the cushioning material in the sixteenth variation. Hereinafter, refer to the description... Figure 18 The buffer material 1A16 based on the sixteenth variation of Embodiment 1 will be described. Furthermore, in the buffer material 1A16 of this sixteenth variation, it is also configured in the same way as in Embodiment 1: the diameter R of the ground surface opening 23b and the length L of the connecting path 23 satisfy the condition R < L.

[0147] like Figure 18 As shown, in the sixteenth variation, the buffer material 1A16 has two unit structures U arranged in the height direction, i.e., the Z direction. In this configuration, the buffer material 1A16 also has a first through-part 12 and a second through-part 13 that penetrate the buffer portion 10 when viewed along the normal direction of the ground surface 22.

[0148] Therefore, in the cushioning material 1A16 of this sixteenth variation, by providing a cover portion 20 having the same structure as in the case of embodiment 1, it is also possible to prevent the cushioning material 1A16 from being damaged or its performance reduced due to the intrusion of foreign objects.

[0149] (Implementation Method 2)

[0150] Figure 19 This is a perspective view of the cushioning material according to Embodiment 2. Hereinafter, refer to the... Figure 19 The cushioning material 1B of this embodiment will be described. Furthermore, the cushioning material 1B of this embodiment is provided in the sole 110 of the shoe in embodiment 1, replacing the cushioning material 1A of embodiment 1.

[0151] like Figure 19As shown, the cushioning material 1B of this embodiment differs from the cushioning material 1A of Embodiment 1 only in the structure of the cushioning portion 10. Specifically, in the cushioning material 1B of this embodiment, the cushioning portion 10 is composed of a three-dimensional structure S, which is based on a helical icosahedral structure and to which a thickness is added. The three-dimensional structure S has a three-dimensional shape formed by walls 11 whose shape is defined by a pair of parallel geometric surfaces.

[0152] Here, in the buffer section 10, which is a three-dimensional structure S formed by using a helical icosahedral structure as a reference and adding thickness thereto, a through section is also provided on its structure that extends through the buffer section 10 when viewed along the normal direction of the ground surface 22. Furthermore, in the buffer material 1B shown in the figure, three unit structures are arranged in the width direction (X direction) and the depth direction (Y direction), respectively, and one unit structure is arranged in the height direction (Z direction).

[0153] Therefore, like the buffer material 1B of this embodiment, by providing a cover 20 to cover the bottom surface of the buffer portion 10, and providing a connecting passage 23 with the same structure as the buffer material 1A of embodiment 1 in the portion of the cover 20 corresponding to the through portion, it is possible to reliably discharge the uncured resin during manufacturing, while suppressing the intrusion of foreign matter into the buffer portion 10.

[0154] (Implementation Method 3)

[0155] Figure 20 This is a perspective view of the cushioning material according to Embodiment 3. Hereinafter, refer to the... Figure 20 The cushioning material 1C of this embodiment will be described. Furthermore, the cushioning material 1C of this embodiment is provided in the sole 110 of the shoe in embodiment 1, replacing the cushioning material 1A of embodiment 1.

[0156] like Figure 20 As shown, the cushioning material 1C of this embodiment differs from the cushioning material 1A of Embodiment 1 only in the structure of the cushioning portion 10. Specifically, in the cushioning material 1C of this embodiment, the cushioning portion 10 is composed of a three-dimensional structure S, which is based on the Schwarz D structure and to which a thickness is added. The three-dimensional structure S has a three-dimensional shape formed by walls 11 whose shape is defined by a pair of parallel geometric surfaces.

[0157] Here, in the buffer section 10, which is a three-dimensional structure S formed by using the Schwarz D structure as a reference and adding thickness thereto, a through section is also provided on its structure that extends through the buffer section 10 when viewed along the normal direction of the ground surface 22. Furthermore, in the buffer material 1C shown in the figure, three unit structures are arranged in the width direction (X direction) and the depth direction (Y direction), respectively, and one unit structure is arranged in the height direction (Z direction).

[0158] Therefore, like the buffer material 1C of this embodiment, by providing a cover 20 to cover the bottom surface of the buffer portion 10, and providing a connecting passage 23 with the same structure as the buffer material 1A of embodiment 1 in the portion of the cover 20 corresponding to the through portion, it is possible to reliably discharge the uncured resin during manufacturing, while suppressing the intrusion of foreign matter into the buffer portion 10.

[0159] (Implementation Method 4)

[0160] Figure 21 This is a perspective view of the cushioning material according to Embodiment 4. Hereinafter, refer to the... Figure 21 The cushioning material 1D of this embodiment will be described. Furthermore, the cushioning material 1D of this embodiment is provided in the sole 110 of the shoe in embodiment 1, replacing the cushioning material 1A of embodiment 1.

[0161] like Figure 21 As shown, the cushioning material 1D of this embodiment differs from the cushioning material 1A of Embodiment 1 only in the structure of the cushioning portion 10. Specifically, in the cushioning material 1D of this embodiment, the cushioning portion 10 is composed of a three-dimensional structure S, which has a three-dimensional shape formed by walls 11 whose shape is defined by a pair of parallel geometric surfaces. The three-dimensional structure S comprises a three-dimensional structure formed by adding thickness to a plurality of planes arranged to intersect each other with internal cavities as a reference. Furthermore, the three-dimensional structure S illustrated is a three-dimensional structure formed by adding thickness to an octet structure as a reference.

[0162] Here, in the buffer section 10, which is a three-dimensional structure S formed by using an octagonal structure as a reference and adding thickness thereto, a hole is provided in the wall 11 to allow uncured resin to be discharged during manufacturing. Therefore, the buffer section 10 is provided with a through portion that extends through the buffer section 10 when viewed along the normal direction of the ground surface 22. Furthermore, in the illustrated buffer material 1D, three unit structures are arranged in the width direction (X direction) and the depth direction (Y direction), and one unit structure is arranged in the height direction (Z direction).

[0163] Therefore, like the buffer material 1D of this embodiment, by providing a cover 20 to cover the bottom surface of the buffer portion 10, and providing a connecting passage 23 with the same structure as the buffer material 1A of embodiment 1 in the portion of the cover 20 corresponding to the through portion, it is possible to reliably discharge the uncured resin during manufacturing, while suppressing the intrusion of foreign matter into the buffer portion 10.

[0164] (Implementation Method 5)

[0165] Figure 22 This is a perspective view of the cushioning material in embodiment 5. Figure 23A and Figure 23B yes Figure 22 The bottom view of the cushioning section of the cushioning material shown. Figure 23A This is a bottom view of the cushioning material with the cover removed (i.e., a bottom view of the cushioning section). Figure 23B This is a bottom view of the entire cushioning material, including the buffer section and the cover section. Additionally, Figure 24 It is along Figure 23B The cross-sectional view of line XXIV-XXIV shown in the figure. Figure 25 yes Figure 24 The enlarged cross-sectional view of region XXV is shown. Hereinafter, refer to the... Figures 22 to 25 The cushioning material 1E of this embodiment will be described. Furthermore, the cushioning material 1E of this embodiment is provided in the sole 110 of the shoe in embodiment 1, replacing the cushioning material 1A of embodiment 1.

[0166] like Figures 22 to 25 As shown, the structure of the cover portion 20 of the buffer material 1E in this embodiment is different from that of the buffer material 1A in the first embodiment, and its structure is different in that it includes a columnar portion 30 in addition to the buffer portion 10 and the cover portion 20.

[0167] like Figure 22 , Figure 23B , Figure 24 and Figure 25 As shown, the cover portion 20 is positioned lower than the bottom surface of the buffer portion 10, and the columnar portion 30 is located between the buffer portion 10 and the cover portion 20 to connect the buffer portion 10 and the cover portion 20. The buffer material 1E is composed of a single component formed by continuously connecting the buffer portion 10, the cover portion 20 and the columnar portion 30.

[0168] In this embodiment, a cover portion 20 is provided corresponding to each unit structure U included in the buffer portion 10, and multiple columnar portions 30 are provided to connect the corresponding set of unit structures U to the cover portion 20. Therefore, multiple cover portions 20 are arranged in a matrix to cover multiple first opening ends 12a provided on the bottom surface of the buffer portion 10.

[0169] Each of the multiple cover portions 20 has a disc-shaped form, and its upper surface is configured as a connecting surface 21 (especially referring to...). Figure 24 ), and its lower surface is configured as a ground surface 22. Each of the plurality of cover portions 20 has a size that completely covers the first opening end 12a located on the bottom surface of the corresponding unit structure U.

[0170] Each of the plurality of columnar portions 30 extends independently downward from the periphery of the lower end of the unit structure U, and its top end is connected to the periphery of the cover portion 20. In this embodiment, each of the plurality of columnar portions 30 is configured to have a generally plate-like shape.

[0171] In the cushioning material 1E constructed in this way, although a plurality of cover portions 20 and a plurality of columnar portions 30 are arranged below the cushioning portion 10, a gap G is formed between the cushioning portion 10 and the plurality of cover portions 20 and the plurality of columnar portions 30. Therefore, the gap G constitutes a discharge path for discharging uncured resin during manufacturing.

[0172] On the other hand, as described above, each of the multiple covers 20 is located below the corresponding unit structure U and covers the first opening end 12a located on the bottom surface of the corresponding unit structure U. Therefore, when the cushioning material 1E is viewed along the normal direction of the ground surface 22, the multiple first through portions 12 included in the cushioning portion 10 are completely covered by their corresponding covers 20. Therefore, the multiple first through portions 12 are not directly exposed to the outside along the normal direction of the ground surface 22, thus preventing foreign objects from immediately reaching the interior of the cushioning portion 10.

[0173] Here, based on the viewpoint of ensuring the proper removal of uncured resin during manufacturing, and the viewpoint that even if sufficiently fine foreign matter penetrates the interior of the cushioning material 1E, it is unlikely to cause the aforementioned performance degradation or damage, refer to... Figure 25 The distance D between the bottom surface of the buffer portion 10 and the connecting surface 21 of the cover portion 20 is preferably 0.8 mm or more and 15.0 mm or less, and more preferably 1.0 mm or more and 10 mm or less.

[0174] In this way, by providing a sole that includes the cushioning material 1E of this embodiment and a shoe that includes the sole, it is possible to manufacture a sole that can prevent damage or performance degradation of the cushioning material 1E caused by the intrusion of foreign objects, and a shoe that includes the sole.

[0175] (Implementation Method 6)

[0176] Figure 26 This is a perspective view of the cushioning material according to embodiment 6. Figure 27A and Figure 27B yes Figure 26 The bottom view of the cushioning section of the cushioning material shown. Figure 27A This is a bottom view of the cushioning material with the cover removed (i.e., a bottom view of the cushioning section). Figure 27B This is a bottom view of the entire cushioning material, including the buffer section and the cover. Additionally, Figure 28 It is along Figure 27B The cross-sectional view of line XXVIII-XXVIII shown. Figure 29 yes Figure 28 The enlarged cross-sectional view of region XXIX is shown below. Referring hereafter, [further details are provided]. Figures 26 to 29 The cushioning material 1F of this embodiment will be described. Furthermore, the cushioning material 1F of this embodiment is provided in the sole 110 of the shoe in embodiment 1, replacing the cushioning material 1A of embodiment 1.

[0177] like Figures 26 to 29 As shown, the cushioning material 1F of this embodiment differs from the cushioning material 1E of embodiment 5 only in the structure of the cover portion 20 and the columnar portions 30. Specifically, in the cushioning material 1F of this embodiment, a cover portion 20 is provided corresponding to a plurality of unit structures U included in the cushioning portion 10, and a plurality of columnar portions 30 are provided in such a way that a plurality of unit structures U in a corresponding group are connected to a cover portion 20.

[0178] Here, in the buffer material 1F of this embodiment, the plurality of cover portions 20 are configured as plates having a rectangular shape when viewed from above, and the plurality of columnar portions 30 are formed such that they extend upward from the periphery of each of the plurality of cover portions 20, and their top ends are connected to the lower ends of each of the plurality of unit structures U. In addition, each of the plurality of columnar portions 30 has a generally triangular pyramidal shape.

[0179] In cases of such configuration, especially as Figure 27B As shown, with each of the multiple cover portions 20 spanning multiple unit structures U, several of the multiple second through portions 13 are covered by the multiple cover portions 20. Therefore, by adopting this structure, none of the multiple first through portions 12 included in the through portions of the buffer portion 10 will be directly exposed to the outside along the normal direction of the ground surface 22, and consequently, several of the multiple second through portions 13 included in the through portions of the buffer portion 10 will not be directly exposed to the outside along the normal direction of the ground surface 22.

[0180] Therefore, by providing a sole that includes the cushioning material 1F of this embodiment and a shoe that includes the sole, it is possible to manufacture a sole that can prevent damage or performance degradation of the cushioning material 1F caused by the intrusion of foreign objects, and a shoe that includes the sole.

[0181] (Implementation Method 7)

[0182] Figure 30This is a perspective view of the cushioning material according to embodiment 7. Figure 31A and Figure 31B yes Figure 30 The bottom view of the cushioning section of the cushioning material shown. Figure 31A This is a bottom view of the cushioning material with the cover removed (i.e., a bottom view of the cushioning section). Figure 31B This is a bottom view of the entire cushioning material, including the buffer section and the cover. Additionally, Figure 32 It is along Figure 31B The cross-sectional view of line XXXII-XXXII shown in the figure. Figure 33 yes Figure 32 The enlarged cross-sectional view of region XXXIII is shown below. Referring to the following... Figures 30 to 33 The cushioning material 1G of this embodiment will be described. Furthermore, the cushioning material 1G of this embodiment is provided in the sole 110 of the shoe in embodiment 1, replacing the cushioning material 1A of embodiment 1.

[0183] like Figures 30 to 33 As shown, the cushioning material 1G of this embodiment, compared with the cushioning material 1E of the above embodiment, includes not only the cushioning part 10, the cover part 20 and the columnar part 30, but also an additional cover part 20' and an additional columnar part 30', and its structure is different in this respect.

[0184] like Figure 30 , Figure 31B , Figure 32 and Figure 33 As shown, the additional cover 20' is positioned lower than the bottom surface of the buffer 10, and the additional columnar part 30' is located between the buffer 10 and the additional cover 20' to connect the buffer 10 and the additional cover 20'. The buffer material 1G is composed of a single component formed by continuously connecting the buffer 10, the cover 20, the columnar part 30, the additional cover 20', and the additional columnar part 30'.

[0185] In this embodiment, an additional cover 20' is provided corresponding to each of the four adjacent unit structures U included in the buffer section 10 (the four unit structures U include two unit structures adjacent in the width direction (i.e., the X direction) and two unit structures U adjacent in the depth direction (i.e., the Y direction)). Four additional columnar portions 30' are provided to connect the corresponding set of four unit structures U to one additional cover 20'. Therefore, multiple additional cover portions 20' are arranged in a matrix to cover the multiple second through portions 13 provided on the bottom surface of the buffer section 10.

[0186] Each of the additional cover portions 20' has a disc-shaped form, and its upper surface is configured as a connecting surface 21 (especially referring to...). Figure 32), and its lower surface is configured as a ground surface 22. Each of the plurality of additional cover portions 20' has a size that completely covers the corresponding second through portion 13.

[0187] Each of the additional columnar portions 30' extends downward from the periphery of the lower end of each of the four unit structures U, and its top end is connected to the periphery of the additional cover portion 20'. In this embodiment, each of the additional columnar portions 30' is configured to have a generally cylindrical shape.

[0188] In a buffer material 1G constructed in this way, when the buffer material 1G is viewed along the normal direction of the ground surface 22, all of the plurality of first through-holes 12 and the plurality of second through-holes 13 included in the buffer section 10 are covered by the corresponding cover section 20 and the additional cover section 20'. Therefore, since the plurality of first through-holes 12 and the plurality of second through-holes 13 are not directly exposed to the outside along the normal direction of the ground surface 22, foreign objects can be prevented from immediately reaching the interior of the buffer section 10.

[0189] In this way, by providing a sole that includes the cushioning material 1G of this embodiment and a shoe that includes the sole, it is possible to manufacture a sole that can prevent damage or performance degradation of the cushioning material 1G caused by the intrusion of foreign objects, and a shoe that includes the sole.

[0190] (Implementation Method 8)

[0191] Figure 34 This is a perspective view of the cushioning material according to Embodiment 8. Hereinafter, reference will be made to the... Figure 34 The cushioning material 1H of this embodiment will be described. Furthermore, the cushioning material 1H of this embodiment is provided in the sole 110 of the shoe in embodiment 1, replacing the cushioning material 1A of embodiment 1.

[0192] like Figure 34 As shown, the buffer material 1H of this embodiment differs from the buffer material 1E of embodiment 5 only in the structure of the buffer portion 10. Specifically, in the buffer material 1H of this embodiment, the buffer portion 10 is composed of a three-dimensional structure S, which is based on a helical icosahedral structure and to which a thickness is added. The three-dimensional structure S has a three-dimensional shape formed by walls 11 whose shape is defined by a pair of parallel geometric surfaces.

[0193] Here, in the buffer section 10, which is a three-dimensional structure S formed by using a helical icosahedral structure as a reference and adding thickness thereto, a through section is also provided on its structure that penetrates the buffer section 10 when viewed along the normal direction of the ground surface 22. Furthermore, in the buffer material 1H shown in the figure, two unit structures are arranged in the width direction (X direction) and the depth direction (Y direction), respectively, and one unit structure is arranged in the height direction (Z direction).

[0194] Therefore, like the buffer material 1H of this embodiment, by arranging a plurality of cover portions 20 and a plurality of columnar portions 30 below the buffer portion 10, and by having the plurality of cover portions 20 cover the through portion, it is possible to reliably discharge the uncured resin produced during manufacturing, while also suppressing the intrusion of foreign matter into the buffer portion 10.

[0195] (Implementation Method 9)

[0196] Figure 35 This is a perspective view of the cushioning material according to Embodiment 9. Hereinafter, reference will be made to the... Figure 35 The cushioning material 1I of this embodiment will be described. Furthermore, the cushioning material 1I of this embodiment is provided in the sole 110 of the shoe in embodiment 1, replacing the cushioning material 1A of embodiment 1.

[0197] like Figure 35 As shown, the cushioning material 1I of this embodiment differs from the cushioning material 1E of embodiment 5 only in the structure of the cushioning portion 10. Specifically, in the cushioning material 1I of this embodiment, the cushioning portion 10 is composed of a three-dimensional structure S, which is based on the Schwarz D structure and to which a thickness is added. The three-dimensional structure S has a three-dimensional shape formed by walls 11 whose shape is defined by a pair of parallel geometric surfaces.

[0198] Here, in the buffer section 10, which is a three-dimensional structure S formed by using the Schwarz D structure as a reference and adding thickness thereto, a through section is also provided on its structure that extends through the buffer section 10 when viewed along the normal direction of the ground surface 22. Furthermore, in the illustrated buffer material 1I, two unit structures are arranged in the width direction (X direction) and the depth direction (Y direction), and two unit structures are arranged in the height direction (Z direction).

[0199] Therefore, like the buffer material 1I of this embodiment, by arranging a plurality of cover portions 20 and a plurality of columnar portions 30 below the buffer portion 10, and by having the plurality of cover portions 20 cover the through portion, it is possible to reliably discharge the uncured resin produced during manufacturing, while also suppressing the intrusion of foreign matter into the buffer portion 10.

[0200] (Implementation Method 10)

[0201] Figure 36 This is a perspective view of the cushioning material according to Embodiment 10. Hereinafter, reference will be made to the following... Figure 36 The cushioning material 1J of this embodiment will be described. Furthermore, the cushioning material 1J of this embodiment is provided in the sole 110 of the shoe in embodiment 1, replacing the cushioning material 1A of embodiment 1.

[0202] like Figure 36 As shown, the cushioning material 1J of this embodiment differs from the cushioning material 1E of embodiment 5 only in the structure of the cushioning portion 10. Specifically, in the cushioning material 1J of this embodiment, the cushioning portion 10 is composed of a three-dimensional structure S, which has a three-dimensional shape formed by walls 11 whose shape is defined by a pair of parallel geometric surfaces. The three-dimensional structure S comprises a three-dimensional structure formed by adding thickness to a plurality of planes arranged to intersect each other with internal cavities as a reference. Furthermore, the three-dimensional structure S illustrated is a three-dimensional structure formed by adding thickness to an octet structure as a reference.

[0203] Here, in the buffer section 10, which is a three-dimensional structure S formed by using an octagonal structure as a reference and adding thickness thereto, a hole is provided in the wall 11 to allow uncured resin to be discharged during manufacturing. Therefore, the buffer section 10 is provided with a through portion that extends through the buffer section 10 when viewed along the normal direction of the ground surface 22. Furthermore, in the buffer material 1J shown in the figure, two unit structures are arranged in the width direction (X direction), the depth direction (Y direction), and the height direction (Z direction).

[0204] Therefore, like the buffer material 1J in this embodiment, by arranging a plurality of cover portions 20 and a plurality of columnar portions 30 below the buffer portion 10, and by having the plurality of cover portions 20 cover the through portion, it is possible to reliably discharge the uncured resin produced during manufacturing, while also suppressing the intrusion of foreign matter into the buffer portion 10.

[0205] (Summary of the disclosed content in the implementation methods, etc.)

[0206] The characteristic structures disclosed in Embodiments 1 to 10 and their variations are summarized below.

[0207] According to an embodiment of the present disclosure, a shoe sole includes a cushioning material in at least a portion and is provided with a contact surface. The cushioning material includes a cushioning portion comprising a three-dimensional structure, wherein the three-dimensional structure is a unit structure formed by walls whose shape is defined by a pair of parallel planes or curved surfaces, and a plurality of such unit structures are arranged regularly and continuously in at least one direction. The cushioning portion includes a plurality of through-holes that penetrate the cushioning portion when viewed along the normal direction of the contact surface. The cushioning material includes a cover portion that, when viewed along the normal direction of the contact surface, corresponds to at least one of the plurality of through-holes included in the cushioning portion and covers the through-holes. The cushioning material is constituted by a single member formed in a manner in which the cushioning portion and the cover portion are continuously connected. The contact surface is defined by a main surface of the cover portion opposite to the side where the cushioning portion is located, and the cover portion includes a connecting path with one end open relative to the through-hole and the other end open in the contact surface. Regarding the sole according to an embodiment of the present disclosure, when a maximum imaginary circle is drawn that is inscribed within the outline of the opening of the connecting path on the side of the contact surface, the condition R < L is satisfied when the diameter of the imaginary circle is set to R and the length of the connecting path extending along the direction of the connecting path is set to L.

[0208] In a shoe sole according to an embodiment of the present disclosure, the opening of the connecting path on the contact surface side may be non-circular.

[0209] In a shoe sole according to an embodiment of the present disclosure, the connecting path may include a portion whose cross-sectional area decreases as it moves from the contact surface side toward the through portion side.

[0210] In a shoe sole according to an embodiment of the present disclosure, the connecting path may include a portion whose cross-sectional area decreases as it moves from the through portion side toward the contact surface side.

[0211] In a shoe sole according to an embodiment of the present disclosure, the connecting path may include a portion extending in a direction intersecting the normal direction of the contact surface.

[0212] In a shoe sole according to an embodiment of the present disclosure, the opening of the connecting path on the contact surface side and the opening of the connecting path on the through portion side are located at positions that do not overlap when viewed along the normal direction of the contact surface.

[0213] According to another embodiment of this disclosure, the sole includes a cushioning material in at least a portion and is provided with a contact surface. The cushioning material includes a cushioning portion comprising a three-dimensional structure, wherein the three-dimensional structure is a unit structure formed by walls whose shape is defined by a pair of parallel planes or curved surfaces, and a plurality of such unit structures are arranged regularly and continuously in at least one direction. The cushioning portion includes a plurality of through-holes that penetrate the cushioning portion when viewed along the normal direction of the contact surface. The cushioning material includes a cover portion that, when viewed along the normal direction of the contact surface, corresponds to at least one of the plurality of through-holes included in the cushioning portion and covers the through-holes, and also includes a columnar portion connecting the cushioning portion and the cover portion. The cushioning material is constituted by a single component formed by continuously connecting the cushioning portion, the columnar portion, and the cover portion. The contact surface is defined by a main surface of the cover portion opposite to the side where the columnar portion is located. In another embodiment of the sole according to the present disclosure, the through portion communicates with the outside via a gap formed by the provision of the columnar portion and the cover portion.

[0214] In the sole of a shoe according to one embodiment of the present disclosure and another embodiment of the present disclosure, the three-dimensional structure may include a three-dimensional structure formed by taking a triple-period minimal curved surface as a reference and adding thickness thereto.

[0215] In the sole of a shoe according to one embodiment of the present disclosure and another embodiment of the present disclosure, the three-dimensional structure may include a three-dimensional structure formed by using a plurality of planes arranged to intersect each other in a manner having internal cavities as a reference and adding thickness to them.

[0216] A shoe according to an embodiment of the present disclosure includes: a sole according to one embodiment of the present disclosure or another embodiment of the present disclosure; and an upper disposed above the sole.

[0217] (Other embodiments, etc.)

[0218] In embodiments 1 to 10 and their variations, examples illustrating the provision of cushioning material in a specific portion of the sole when viewed from above have been provided; however, the location of the cushioning material is not limited to this. For example, depending on the type of competition or purpose for which the shoe is used, cushioning material may be provided only in either the inner or outer portion of the sole, or only in a portion of the sole along the edge (multiple portions of which may be provided independently). Alternatively, the sole may be entirely composed of cushioning material without a midsole.

[0219] Furthermore, in the embodiments 1 to 10 and their variations, examples are given of three-dimensional structures constituting the buffer portion having a structure with a Schwarz P structure, a spiral icosahedral structure, a Schwarz D structure, or an octagonal structure as a reference and with added thickness. However, the present invention can also be applied to buffer portions composed of other three-dimensional structures.

[0220] Furthermore, in the embodiments 1 to 10 and their variations, the application of the present invention to shoes including a tongue and laces has been illustrated, but the present invention can also be applied to shoes that do not include these (e.g., shoes including a sock-like upper) and the soles thereon.

[0221] Furthermore, the characteristic structures disclosed in Embodiments 1 to 10 and their variations can be combined with each other without departing from the spirit of the invention.

[0222] Embodiments of the present invention have been described, but it should be considered that the embodiments disclosed herein are merely illustrative and not limiting in all respects. The scope of the invention is defined by the claims and is intended to include all modifications within the meaning and scope equivalent to the claims.

Claims

1. A shoe sole, comprising at least a portion a cushioning material and having a contact surface, characterized in that, The cushioning material includes a cushioning section, which comprises a three-dimensional structure. The three-dimensional structure is formed by a three-dimensional shape created by walls whose shape is defined by a pair of parallel planes or curved surfaces. Multiple such unit structures are arranged regularly and continuously in at least one direction. The buffer section is provided with a plurality of through sections that extend through the buffer section when viewed along the normal direction of the ground surface. The cushioning material includes a cover portion that, when viewed along the normal direction of the ground surface, corresponds to at least one of the plurality of through-holes included in the cushioning portion and covers the through-hole portion. The cushioning material is composed of a single component formed by continuously connecting the cushioning portion and the cover portion. The ground plane is defined by the main surface of the cover portion on the side opposite to the side where the buffer portion is located. The cover portion includes a connecting passage with one end open relative to the through portion and the other end open to the ground surface. When a maximum imaginary circle is drawn that is inscribed within the outline of the opening of the connecting path on the side of the ground surface, the condition R < L is satisfied when the diameter of the imaginary circle is set to R and the length of the connecting path along the direction of extension of the connecting path is set to L.

2. The sole according to claim 1, characterized in that, The opening of the connecting path on the ground surface side is non-circular.

3. The sole according to claim 1 or 2, characterized in that, The connecting path includes a portion whose cross-sectional area decreases as it moves from the ground surface side toward the through portion side.

4. The sole according to claim 1 or 2, characterized in that, The connecting path includes a portion whose cross-sectional area decreases as it moves from the through section side toward the ground surface side.

5. The sole according to claim 1 or 2, characterized in that, The connecting path includes a portion extending in a direction that intersects the normal direction of the ground plane.

6. The sole according to claim 5, characterized in that, When viewed along the normal direction of the ground plane, the opening of the connecting path on the ground plane side and the opening of the connecting path on the through part side are located in positions that do not overlap with each other.

7. A shoe sole, comprising at least a portion a cushioning material and having a contact surface, characterized in that, The cushioning material includes a cushioning section, which comprises a three-dimensional structure. The three-dimensional structure is formed by a three-dimensional shape created by walls whose shape is defined by a pair of parallel planes or curved surfaces. Multiple such unit structures are arranged regularly and continuously in at least one direction. The buffer section is provided with a plurality of through sections that extend through the buffer section when viewed along the normal direction of the ground surface. The cushioning material includes a cover portion that, when viewed along the normal direction of the ground surface, corresponds to at least one of the plurality of through portions included in the cushioning portion and covers the through portions. It also includes a columnar portion connecting the cushioning portion and the cover portion. The cushioning material is composed of a single component formed by continuously connecting the cushioning portion, the columnar portion, and the cover portion. The ground plane is defined by the main surface of the cover portion on the side opposite to the side where the columnar portion is located. The through portion communicates with the outside through the gap formed by the columnar portion and the cover portion.

8. The sole according to any one of claims 1, 2, and 7, characterized in that, The three-dimensional structure is formed by using a triple-period minimal surface as a reference and adding thickness to the reference.

9. The sole according to any one of claims 1, 2, and 7, characterized in that, The three-dimensional structure is formed by using multiple intersecting planes with internal cavities as a reference, and adding thickness to the reference.

10. A shoe, characterized in that, include: The sole as described in any one of claims 1, 2, and 7; as well as The upper is located above the sole.

Images