Soles and shoes

Abstract

To provide a shoe sole and a shoe that assists formation of an arch to the sole of a foot in working of a load to the arch part and that can reduce sense of pressure to the sole of a foot in non-working of the load to the arch part.SOLUTION: The shoe sole 10 includes: a support part 210 that supports a foot of a user so as to assist formation of the arch to the sole of the foot in working of a load to the arch part; and a mobility deformation part 220 that is arranged inside and outside of the support part in the width direction of a shoe sole. The mobility deformation part 220 raises the support part for the mobility deformation part so that an uplift amount of the support part to a foot contact surface side for the mobility deformation part in working of a load to the support part and the mobility deformation part becomes larger than the uplift amount of the support part to the foot contact surface side for the mobility deformation part in non-working of the load to the support part and the mobility deformation part.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] This disclosure relates to shoe soles and shoes. [Background technology]

[0002] In general, the arch formed on the sole of the foot plays an important role in absorbing shock and improving running and walking efficiency, but it is said that it weakens due to the loosening of muscles and ligaments caused by aging, leading to various foot diseases. For example, if the medial longitudinal arch weakens, the shock absorption capacity when the arch is loaded decreases, which increases the load on each joint of the lower limbs and reduces the efficiency of exercise when running and walking. In addition, if the transverse arch weakens, the foot becomes splayed, which can cause hallux valgus.

[0003] To prevent such diseases, shoes that help form an arch in the sole of the foot are known. For example, JP2012-517318A discloses a functional shoe equipped with a foot arch support. The foot arch support includes a support body fixed to the shoe body, a slider that moves up and down relative to the support body, and a contact member connected to the upper end of the slider. The contact member protrudes into the shoe and contacts the foot arch of the sole. This effectively forms the arch of the sole. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Special Publication No. 2012-517318 Summary of the Invention [Problem to be solved by the invention]

[0005] In the shoes described in JP2012-517318A, the sole of the foot is constantly pressed by the contact member, so the pressure on the sole continues even when the foot is not in contact with the ground, i.e., when no load is acting on the arch portion. As a result, the wearer constantly feels a sense of pressure on the sole of the foot.

[0006] The object of the present disclosure is to provide a sole and shoes that assist in the formation of an arch on the sole of the foot when load is applied to the arch portion during running, walking, exercise, etc., and that can reduce the feeling of pressure on the sole of the foot when load is not applied to the arch portion (such as when standing upright while wearing shoes). [Means for solving the problem]

[0007] A sole according to one aspect of this disclosure is provided in an area of ​​the sole that includes a portion of the sole that overlaps with the wearer's arch portion in the thickness direction of the sole, and comprises a support portion that supports the wearer's foot so as to assist in the formation of an arch in the sole when a load is applied to the arch portion, and easily deformable portions that are arranged on the inside and outside of the support portion in the width direction of the sole, and the easily deformable portions are raised relative to the easily deformable portions so that the amount of protrusion of the support portion toward the foot contact surface relative to the easily deformable portions when a load is applied to the support portion and the easily deformable portions is greater than the amount of protrusion of the support portion toward the foot contact surface relative to the easily deformable portions when no load is applied to the support portion and the easily deformable portions.

[0008] A shoe according to one aspect of the disclosure includes the sole and an upper connected to and positioned above the sole. Effect of the Invention

[0009] According to this disclosure, it is possible to provide a sole and shoe that assists in the formation of an arch on the sole of the foot when load is applied to the arch portion during running, walking or other exercise, and reduces the feeling of pressure on the sole of the foot when load is not applied to the arch portion (such as when standing upright while wearing shoes). [Brief description of the drawings]

[0010] [Figure 1] 1 is a perspective view showing a schematic view of a sole of a shoe according to a first embodiment of the present invention. [Diagram 2] FIG. 2 is a cross-sectional view taken along line II-II in FIG. [Diagram 3]10 is a diagram showing a schematic diagram of the relationship between the positions at which the arch portion and the support portion are provided and the bones. FIG. [Figure 4] 4 is a cross-sectional view showing a schematic state in which a load is applied to a support portion and a deformable portion. FIG. [Diagram 5] FIG. 11 is a cross-sectional view showing a schematic modification of the shoe sole. [Figure 6] 6 is a cross-sectional view showing a state in which a load is applied to a support portion and a deformable portion of the sole shown in FIG. 5. FIG. [Figure 7] FIG. 11 is a cross-sectional view showing a schematic modification of the shoe sole. [Figure 8] FIG. 11 is a cross-sectional view showing a schematic modification of the shoe sole. [Figure 9] FIG. 11 is a cross-sectional view showing a schematic modification of the shoe sole. [Figure 10] FIG. 11 is a cross-sectional view showing a schematic modification of the shoe sole. [Figure 11] 11 is a cross-sectional view showing a state in which a load is applied to a support portion and a deformable portion of the sole shown in FIG. 10. FIG. [Figure 12] FIG. 2 is a perspective view showing a shoe sole and an insole. [Figure 13] 13 is a cross-sectional view taken along line XIII-XIII in FIG. 12. [Figure 14] 11A and 11B are cross-sectional views illustrating schematic modifications of the support portions in the sole and insole. [Figure 15] 11A and 11B are cross-sectional views illustrating schematic modifications of the support portions in the sole and insole. [Figure 16] FIG. 2 is a perspective view showing a shoe sole, a midsole, and an insole. [Figure 17] 17 is a cross-sectional view taken along line XVII-XVII in FIG. 16. [Figure 18] 18 is a cross-sectional view illustrating a state in which a load is applied to the support portion and the easily deformable portion illustrated in FIG. 17. FIG. [Figure 19] FIG. 11 is a cross-sectional view showing a schematic modification of the promotion portion. [Figure 20] FIG. 11 is a cross-sectional view showing a schematic modification of the promotion portion. [Figure 21] FIG. 11 is a cross-sectional view showing a schematic modification of the promotion portion. [Figure 22] FIG. 11 is a cross-sectional view showing a schematic modification of the promotion portion. [Diagram 23] FIG. 11 is a cross-sectional view showing a schematic modification of the promotion portion. [Figure 24] FIG. 11 is a cross-sectional view showing a schematic modification of the promotion portion. [Diagram 25] FIG. 11 is a cross-sectional view showing a schematic modification of the promotion portion. [Figure 26] FIG. 11 is a cross-sectional view showing a schematic modification of the promotion portion. [Figure 27] 13 is a cross-sectional view showing a schematic modification of the easily deformable portion. FIG. [Figure 28] 13 is a cross-sectional view showing a schematic modification of the easily deformable portion. FIG. [Figure 29] 13 is a cross-sectional view showing a schematic modification of the easily deformable portion. FIG. [Diagram 30] FIG. 4 is a bottom view illustrating a schematic view of a sole of a shoe according to a second embodiment of the present invention. [Diagram 31] FIG. 31 is a plan view of the sole shown in FIG. 30. [Diagram 32] FIG. 31 is a left side view of the sole shown in FIG. 30. [Diagram 33] 1 is a diagram showing a schematic diagram of a relationship between the bones of a wearer's foot and a support part. [Diagram 34] 34 is a cross-sectional view taken along line XXXIV-XXXIV in FIGS. 30, 31 and 32. FIG. [Diagram 35] 32 is a cross-sectional view taken along line XXXV-XXXV in FIGS. 30 and 31. FIG. [Diagram 36] FIG. 36 is an enlarged view of the support portion in FIG. [Figure 37] 11A-11C are diagrams illustrating the steps of connecting the lower support to the upper support. [Figure 38] 13 is a cross-sectional view showing a schematic modification of the support portion. FIG. [Figure 39] 13 is a cross-sectional view showing a schematic modification of the support portion. FIG. [Diagram 40] 13 is a cross-sectional view showing a schematic modification of the support portion. FIG. [Diagram 41] 13 is a cross-sectional view showing a schematic modification of the support portion. FIG. [Diagram 42]13 is a perspective view showing a schematic diagram of a modified example of the arrangement of the support portion in the sole of a shoe. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] An embodiment of the present disclosure will be described with reference to the drawings. In the drawings referred to below, the same or equivalent members are given the same numbers. In the following description, terms such as longitudinal direction, width direction, forward, and backward are used. These directional terms indicate directions seen from the viewpoint of a wearer wearing the shoe 1 placed on a ground surface P such as the ground. For example, forward refers to the toe side, and backward refers to the heel side. In addition, the inner foot side refers to the inside of the foot in the width direction (the side of the first toe of the foot), and the outer foot side refers to the outside of the foot in the width direction.

[0012] (First embodiment) Fig. 1 is a perspective view showing a schematic view of a sole of a shoe according to a first embodiment of the present invention. Fig. 2 is a cross-sectional view taken along line II-II in Fig. 1. Note that in Fig. 1, the illustration of an upper is omitted.

[0013] 1 and 2 show the sole 10 and shoe 1 for the left foot, but the sole 10 and shoe 1 can also be applied to the right foot, in which case they are symmetrical to the sole 10 and shoe 1 for the left foot. The shoe 1 of this embodiment can be applied as, for example, a sports shoe or a walking shoe, and the purpose of the shoe is not limited.

[0014] As shown in FIGS. 1 and 2, the shoe 1 includes a sole 10 and an upper 20 .

[0015] The upper 20 is connected to the sole 10 and is located above the sole 10. The upper 20, together with the sole 10, forms a space for accommodating the foot.

[0016] As shown in FIG. 1, the sole 10 has a forefoot region R1, a midfoot region R2, and a rearfoot region R3.

[0017] The forefoot region R1 is a region that overlaps with the forefoot of a wearer of the shoe 1 in the thickness direction of the sole 10 (the vertical direction in FIG. 2). The forefoot is a part of the wearer's foot that is located at the front in the longitudinal direction of the foot. The forefoot region R1 is a region that is located in a range of about 0% to 30% of the total length of the shoe 1 from the front end to the rear end of the shoe 1.

[0018] The midfoot region R2 is a region that overlaps with the midfoot of the wearer of the shoe 1 in the thickness direction of the sole 10. The midfoot is a part that is located in the center of the wearer's foot in the longitudinal direction. The midfoot region R2 is a region that is located in a range of about 30% to 80% of the total length of the shoe 1 from the tip end to the rear end of the shoe 1.

[0019] The rear foot region R3 is a region that overlaps with the rear foot of the wearer of the shoe 1 in the thickness direction of the sole 10. The rear foot is a part of the wearer's foot that is located at the rear in the longitudinal direction. The rear foot region R3 is a region that is located in a range of 80% to 100% of the entire length of the shoe 1 from the front end to the rear end of the shoe 1.

[0020] The sole 10 is formed of, for example, a resin foam material (such as EVA foam material). The sole 10 has a support portion 210, an easily deformable portion 220, and a promoting portion 230.

[0021] The support part 210 is provided in an area including a part overlapping with the wearer's arch part A (part including the forefoot and midfoot) in the thickness direction of the sole 10. The support part 210 supports the wearer's foot so as to assist the formation of an arch in the sole when a load is applied to the arch part A (see FIG. 3). Note that when a load is applied means when a load is applied to the arch part A while running, walking, exercising, etc.

[0022] In this embodiment, the support part 210 is provided at a position that assists in the formation of a transverse arch of the foot. This position is in an area including a part that overlaps in the thickness direction with a center part P3 (see FIG. 3) of a line segment that connects the head P1 (see FIG. 3) of the first metatarsal bone and the head P2 (see FIG. 3) of the fifth metatarsal bone of the wearer.

[0023] As shown in FIG. 1, the upper surface of the support part 210 is formed in an elliptical shape that is long in the longitudinal direction of the sole 10.

[0024] As shown in FIG. 2, the lower surface of the support part 210 may be spaced apart from the ground surface P when the shoe 1 is in contact with the ground surface P and no load is acting on the support part 210.

[0025] The easily deformable portions 220 are arranged on the inner and outer sides of the support portion 210 in the width direction of the sole (left and right direction in FIG. 2). In this embodiment, the easily deformable portions 220 are arranged over the entire periphery of the support portion 210. The easily deformable portions 220 are provided in the forefoot region R1 to the midfoot region R2. Note that in FIG. 1, the easily deformable portions 220 are hatched.

[0026] The deformable portion 220 raises the support portion 210 relative to the deformable portion 220 so that the amount of protrusion of the support portion 210 toward the foot contact surface side (upper side in FIG. 2) relative to the deformable portion 220 when a load is applied to the support portion 210 and the deformable portion 220 is greater than the amount of protrusion of the support portion 210 toward the foot contact surface side relative to the deformable portion 220 when no load is applied to the support portion 210 and the deformable portion 220. Note that when no load is applied means, for example, when the person is standing upright while wearing the shoe 1.

[0027] In this embodiment, the deformable portion 220 has a compressive elastic modulus smaller than that of the support portion 210. In addition, in Fig. 2, the deformable portion 220 is hatched differently from the hatching of the support portion 210 and the promotion portion 230.

[0028] As shown in FIG. 2, when the shoe 1 is in contact with the ground surface P and no load is acting on the deformable portion 220, the lower surface of the deformable portion 220 may be spaced apart from the ground surface P.

[0029] The facilitating portion 230 is provided between the support portion 210 and the easily deformable portion 220. In this embodiment, the facilitating portion 230 is formed in an annular shape. The facilitating portion 230 promotes the protrusion of the support portion 210 toward the foot contact surface side relative to the easily deformable portion 220 when a load is applied to the support portion 210 and the easily deformable portion 220. In other words, the facilitating portion 230 promotes the deformation of the support portion 210 and the easily deformable portion 220 at least partially independently from each other and the displacement of the easily deformable portion 220 toward the ground surface P side relative to the support portion 210 so that the protrusion amount of the support portion 210 toward the foot contact surface side relative to the easily deformable portion 220 when a load is applied to the support portion 210 and the easily deformable portion 220 is larger than the protrusion amount of the support portion 210 toward the foot contact surface side relative to the easily deformable portion 220 when a load is not applied to the support portion 210 and the easily deformable portion 220.

[0030] In this embodiment, the facilitating portion 230 is configured as a thin portion having a thickness smaller than that of the easily deformable portion 220. The facilitating portion 230 preferably forms a gap between the surface of the support portion 210 on the foot contact side and the surface of the easily deformable portion 220 on the foot contact side. As shown in FIG. 2, the facilitating portion 230 is provided with an upper recess 232 having a shape recessed from the foot contact side (upper side in FIG. 2) toward the ground contact side. The height t1 of the upper recess 232 is preferably set to 10% or more and 80% or less of the total thickness of the sole 10. The total thickness means the thickness of the end of the easily deformable portion 220 on the support portion 210 side.

[0031] As shown in FIG. 2, the upper recess 232 has an upper inner side surface 232a formed on the support portion 210 side and an upper outer side surface 232b formed on the easily deformable portion 220 side. The upper inner side surface 232a and the upper outer side surface 232b are shaped so that they gradually move away from each other toward the foot contact surface side. The upper recess 232 is formed in a substantially V-shaped cross section. More specifically, the upper inner side surface 232a is substantially perpendicular to the ground surface P when the sole 10 is placed on the ground surface P, and the upper outer side surface 232b is inclined with respect to the ground surface P. This prevents the upper inner side surface 232a and the upper outer side surface 232b from contacting each other when a load is applied to the support portion 210 and the easily deformable portion 220. In addition, the shapes of the upper inner side surface 232a and the upper outer side surface 232b make it easier to remove the sole 10 from the upper and lower molds when molding it with the upper and lower molds.

[0032] 2, when the shoe 1 is in contact with the ground surface P and no load is acting on the support portion 210 and the deformable portion 220, the lower surface of the facilitating portion 230 may be spaced from the ground surface P. The lower surface of the facilitating portion 230 is formed flush with the lower surface of the support portion 210. The lower surface of the facilitating portion 230 is formed flush with the lower surface of the deformable portion 220.

[0033] In the shoe 1 described above, the easily deformable portions 220 are arranged on the inner and outer sides of the support portion 210 in the width direction, so that when a load is applied to the support portion 210 and the easily deformable portion 220, the support portion 210 protrudes relative to the easily deformable portion 220 as shown in Fig. 4. Therefore, when a load is applied to the support portion 210 and the easily deformable portion 220, the support portion 210 effectively assists in the formation of an arch at the arch portion A of the sole of the foot.

[0034] On the other hand, when no load is applied to the support portion 210 and the easily deformable portion 220, as shown in FIG. 2, the amount of protrusion of the support portion 210 toward the foot contact surface side relative to the easily deformable portion 220 is smaller than when a load is applied to the support portion 210 and the easily deformable portion 220, thereby reducing the feeling of pressure on the sole of the foot.

[0035] Furthermore, since this embodiment has a structure in which the support portion 210 is raised relative to the easily deformable portion 220 by utilizing the entire thickness of the sole 10, it is possible to ensure a greater amount of protrusion of the support portion 210 toward the foot contact surface relative to the easily deformable portion 220 than by providing an insole or the like with a protrusion that protrudes toward the foot contact surface.

[0036] Next, a modification of the embodiment described above will be described.

[0037] As shown in Fig. 5, when the shoe 1 is in contact with the ground surface P and no load is applied to the support portion 210 and the deformable portion 220, the distance between the lower surface of the support portion 210 and the lower surface of the facilitating portion 230 and the ground surface P may be greater than the distance between the lower surface of the deformable portion 220 and the ground surface P. In other words, a step may be formed at the boundary between the lower surface of the facilitating portion 230 and the lower surface of the deformable portion 220. In this embodiment as well, as shown in Fig. 6, when a load is applied to the support portion 210 and the deformable portion 220, the support portion 210 effectively rises relative to the deformable portion 220.

[0038] As shown in FIG. 7, the sole 10 may have an outsole 100 and a midsole 200.

[0039] The midsole 200 is formed of a resin foam material. The midsole 200 has a support portion 210, an easily deformable portion 220, and a promoting portion 230.

[0040] The outsole 100 constitutes a ground contact portion. The outsole 100 is connected to the lower surface of the midsole 200. The outsole 100 is made of a material (such as rubber) having a compressive elastic modulus greater than that of the midsole 200.

[0041] As shown in FIG. 8, the support 210 may include an upper support portion 212 and a lower support portion 214 .

[0042] The upper support portion 212 is provided on the foot contact surface side and is made of, for example, an EVA foam material.

[0043] The lower support part 214 is provided below the upper support part 212, and has a compressive elastic modulus greater than that of the upper support part 212. In the example shown in Fig. 8, the lower support part 214 is formed of the same material as the outsole 100. However, the lower support part 214 may be formed of a material different from that of the outsole 100. The lower support part 214 has a shape that protrudes upward from the outsole 100.

[0044] In this embodiment, it is possible to increase the compressive elastic modulus of the entire support part 210 while suppressing discomfort to the sole of the foot when a load is applied to the support part 210 and the easily deformable part 220. Therefore, when a load is applied to the support part 210 and the easily deformable part 220, a larger amount of protrusion of the support part 210 relative to the easily deformable part 220 is ensured.

[0045] As shown in FIG. 9, the facilitating portion 230 may further include a lower recess 234. The lower recess 234 has a shape recessed from the ground contact surface side toward the foot contact surface side. The lower recess 234 is formed at a position overlapping the upper recess 232 in the thickness direction. The area between the upper recess 232 and the lower recess 234 constitutes the facilitating portion 230. With this configuration, the support portion 210 and the easily deformable portion 220 are easily displaced independently, and the amount of protrusion of the support portion 210 toward the foot contact surface side with respect to the easily deformable portion 220 when a load is applied to the support portion 210 and the easily deformable portion 220 is easily increased. The top portion 234t of the lower recess 234 may be formed at a position not overlapping the bottom portion 232t of the upper recess 232 in the thickness direction. It is preferable that the height t2 of the lower recess 234 is set to 5% or more and 60% or less of the total thickness of the sole 10. In the example having the lower recess 234, the height t1 of the upper recess 232 is preferably set to be equal to or greater than 10% and equal to or less than 70% of the total thickness of the sole 10.

[0046] 10, when the shoe 1 is in contact with the ground surface P and no load is applied to the support portion 210 and the deformable portion 220, the lower surface of the support portion 210 may be in contact with the ground surface P, and the lower surface of the deformable portion 220 may be spaced apart from the ground surface P. In the example shown in FIG. 10, the upper surface of the support portion 210 is formed flush with the upper surface of the deformable portion 220. However, the upper surface of the support portion 210 may be set higher or lower than the upper surface of the deformable portion 220.

[0047] In this embodiment, when a load is applied to the support portion 210 and the easily deformable portion 220, as shown in Fig. 11, the upper surface of the easily deformable portion 220 becomes lower than the upper surface of the support portion 210, and the easily deformable portion 220 is displaced toward the ground surface P relative to the support portion 210 so that the lower surface of the easily deformable portion 220 abuts against the ground surface P, whereby the support portion 210 protrudes toward the foot contact surface side relative to the easily deformable portion 220. Note that when a load is applied to the support portion 210 and the easily deformable portion 220, the easily deformable portion 220 may be subjected to compressive deformation.

[0048] As shown in FIG. 12, the shoe 1 may further include a midsole 30. The midsole 30 is disposed on the sole 10. The midsole 30 is provided with a through hole 30h. The through hole 30h has a shape that is slightly larger than the support portion 210. This prevents the midsole 30 from interfering with the support portion 210 that protrudes relative to the deformable portion 220 when a load is applied to the support portion 210 and the deformable portion 220. The configuration of the midsole 30 may be appropriately changed as long as it does not prevent the support portion 210 from protruding relative to the deformable portion 220. For example, the midsole 30 may have a thin portion instead of the through hole 30h.

[0049] 13, it is preferable that the upper surface of the easily deformable portion 220 is set lower than the upper surface of the support portion 210 so that the upper surface of the midsole 30 is flush with the upper surface of the support portion 210. In this way, discomfort felt by the wearer is reduced.

[0050] 14, the corners 210a of the support portion 210 are preferably formed into a curved shape. In this way, interference of the support portion 210 with the midsole 30 is suppressed.

[0051] 15, the upper surface of the support part 210 may be formed in a curved shape that is convex upward. Furthermore, in a state in which no load is applied to the support part 210 and the easily deformable part 220, the upper surface of the support part 210 may be raised above the midsole 30. In this case, if the upper surface side part or the part located above the midsole 30 of the support part 210 is formed of a material that is softer than the other parts of the support part 210, the feeling of pressure can be reduced.

[0052] 16, the shoe 1 may further include an insole 40. The insole 40 is disposed on the midsole 30. In the case of the shoe 1 not including the midsole 30, the insole 40 is disposed on the sole 10.

[0053] As shown in Fig. 17, a groove 42 is provided in a portion of the insole 40 that overlaps with the periphery (promotion portion 230) of the support portion 210 in the thickness direction. The groove 42 is preferably provided on the back surface of the insole 40 opposite to the foot contact surface (upper surface). As shown in Fig. 18, the groove 42 enables the insole 40 to deform so as not to hinder the protrusion of the support portion 210 relative to the deformable portion 220 when a load is applied to the support portion 210 and the deformable portion 220.

[0054] Furthermore, if the insole 40 is not fixed to the midsole 30 or sole 10 by adhesive or the like, there is a possibility that it may displace somewhat relative to the midsole 30 or sole 10 inside the shoe 1. However, by forming the groove 42 at a position overlapping with the periphery of the support portion 210, the groove 42 and the support portion 210 are prevented from overlapping in the thickness direction, that is, the insole 40 is prevented from hindering the protrusion of the support portion 210 relative to the easily deformable portion 220.

[0055] The upper recess 232 in the promotion portion 230 may be formed to have a U-shaped cross section as shown in FIG. 19, or may be formed to have a curved shape that is convex downward as shown in FIG.

[0056] The lower recess 234 may be formed to have a U-shaped cross section as shown in Fig. 21, or may be formed to have a curved shape that is convex upward as shown in Fig. 22. In the example shown in Fig. 22, the top 234t of the lower recess 234 is formed at a position overlapping with the bottom 232t of the upper recess 232 in the thickness direction.

[0057] 23, the facilitating portion 230 may be formed of a material softer than the support portion 210 and the easily deformable portion 220. In this case, the upper recess 232 and the lower recess 234 may be omitted, and the upper surface of the facilitating portion 230 may be formed flush with the upper surface of the support portion 210 and the upper surface of the easily deformable portion 220, and the lower surface of the facilitating portion 230 may be formed flush with the lower surface of the support portion 210 and the lower surface of the easily deformable portion 220. In FIG. 23, the facilitating portion 230 is hatched differently from the hatching of the support portion 210 and the easily deformable portion 220.

[0058] 24, a gap 230c may be provided in the promoting portion 230. In this case, the promoting portion 230 may be formed of the same material as the supporting portion 210 and the easily deformable portion 220.

[0059] 25, the facilitating portion 230 may be formed of a spring having higher elasticity than the support portion 210 and the easily deformable portion 220. The spring is made of, for example, resin or metal.

[0060] 26, the promoting portion 230 may be configured as a slit penetrating the sole 10 in its thickness direction. In other words, the support portion 210 and the easily deformable portion 220 may be structured such that they are separated from each other by the promoting portion 230.

[0061] 27 and 28 , the easily deformable portion 220 may have an upper easily deformable portion 222 and a lower easily deformable portion 224. The lower easily deformable portion 224 is provided below the upper easily deformable portion 222. The lower easily deformable portion 224 has a compressive elastic modulus smaller than that of the upper easily deformable portion 222.

[0062] In the example shown in Fig. 27, the lower easily deformable portion 224 is formed of a softer material than the upper easily deformable portion 222. In Fig. 27, the lower easily deformable portion 224 is hatched differently from the hatching of the support portion 210, the promotion portion 230, and the upper easily deformable portion 222.

[0063] 28, a plurality of grooves 224a are provided in the lower easily deformable portion 224. In the example shown in Fig. 28, the lower easily deformable portion 224 may be formed of the same material as the upper easily deformable portion 222.

[0064] 27 and 28, the upper easily deformable portion 222 may have a compressive elastic modulus smaller than that of the lower easily deformable portion 224. In addition, as the easily deformable portion having the smaller compressive elastic modulus of the upper easily deformable portion 222 or the lower easily deformable portion 224, a spring such as a three-dimensional mesh resin may be used.

[0065] 29, the deformable portion 220 may be provided with a gap 220c. In this case, the deformable portion 220 may be made of the same material as the support portion 210 and the promotion portion 230.

[0066] The modifications shown in Figures 5 to 29 may be combined as appropriate. Although not shown in the drawings, the promotion unit 230 may be omitted.

[0067] Second embodiment Next, a sole 10 according to a second embodiment of the present disclosure will be described with reference to Fig. 30 to Fig. 37. In the second embodiment, only the parts different from the first embodiment will be described, and the description of the same structure, action, and effect as the first embodiment will not be repeated.

[0068] In this embodiment, the sole 10 includes an outsole 100 and a midsole 200 including a support portion 210, an easily deformable portion 220, and a promoting portion 230. In Fig. 30 to Fig. 37, a light dot pattern is applied to the lower easily deformable portion 224 of the easily deformable portion 220, and a dark dot pattern is applied to the outsole 100.

[0069] As shown in FIG. 30 , the outsole 100 includes a central ground contact portion 110 , an inner ground contact portion 121 , and an outer ground contact portion 122 .

[0070] The central ground contact portion 110 is fixed to the lower surface of the support portion 210. As shown in Fig. 33, the central ground contact portion 110 and the support portion 210 are provided in a position that assists in the formation of the transverse arch of the foot, that is, in a region including a portion that overlaps in the thickness direction with a center portion P3 of a line segment connecting the head P1 of the first metatarsal bone and the head P2 of the fifth metatarsal bone of the wearer.

[0071] The inner ground-contact portion 121 is fixed to the lower surface of a part on the inner side in the width direction (the inner side of the foot) of the easily deformable portion 220. The inner ground-contact portion 121 has a shape extending in the longitudinal direction of the sole .

[0072] The outer ground-contact portion 122 is fixed to the underside of a portion on the outer side in the width direction (the outer side of the foot) of the easily deformable portion 220. The outer ground-contact portion 122 has a shape extending in the longitudinal direction of the sole .

[0073] It is preferable that the ratio of the dimension w1 of the central grounding portion 110 in the width direction to the dimension w6 between the inner end of the inner grounding portion 121 and the outer end of the outer grounding portion 122 in the width direction is set to 30% or less.

[0074] It is preferable that the ratio of the dimension w2 of the inner ground contact portion 121 in the width direction to the dimension w6 is set to 25% or less.

[0075] It is preferable that the ratio of the dimension w3 of the outer ground contact portion 122 in the width direction to the dimension w6 is set to 25% or less.

[0076] The ratio of the dimension w4 between the central grounding portion 110 and the inner grounding portion 121 in the width direction to the dimension w6 is preferably set to 10% or more. Similarly, the ratio of the dimension w5 between the central grounding portion 110 and the outer grounding portion 122 in the width direction to the dimension w6 is preferably set to 10% or more. In this way, the support portion 210 and the easily deformable portion 220 can be easily displaced independently of each other.

[0077] The ratio of the length L11 between the front end of the central ground-contact portion 110 and the front end of the easily deformable portion 220 to the total length L10 of the sole 10 is preferably set to 20% or more.

[0078] As shown in FIGS. 34 to 36 , the support portion 210 has an upper support portion 212 and a lower support portion 214 .

[0079] 35, the upper support portion 212 has a shape in which the upper surface thereof is gradually separated from the ground surface toward the rear. The upper surface of the upper support portion 212 may be curved so as to be convex toward the ground surface.

[0080] The lower support portion 214 is made of the same material as the central ground-contact portion 110 of the outsole 100, and is formed integrally with the central ground-contact portion 110. The lower support portion 214 has a shape in which the widthwise and longitudinal dimensions gradually increase toward the central ground-contact portion 110. This makes it possible to increase the compressive elastic modulus of the entire support portion 210 by the lower support portion 214, while minimizing an increase in the volume (weight) of the lower support portion 214.

[0081] It is preferable that the ratio of the height h12 (see FIG. 35) of the central ground portion 110 and the lower support portion 214 to the height h11 (see FIG. 35) of the support portion 210 is set to 30% or more. Note that the height h11 means the height of the center of the support portion 210 in the longitudinal direction, and the height h12 means the height of the center of the lower support portion 214 in the longitudinal direction.

[0082] In a state where no load is applied to the support portion 210 and the deformable portion 220 , the upper surface of the support portion 210 may be set higher than the upper surface of the deformable portion 220 .

[0083] As shown in Fig. 34 to Fig. 36, when the sole 10 is placed on a flat ground surface, the inclination angle of the boundary 213a between the upper support part 212 and the lower support part 214 with respect to the vertical direction (the direction perpendicular to the flat ground surface) is preferably set to 10 degrees or more. In addition, the upper corner 213b and the lower corner 213c at the boundary 213a are preferably formed in a curved shape. This makes it easier to align the central ground part 110 and the lower support part 214 when fitting them to the upper support part 212, as shown in Fig. 37. This prevents gaps from occurring between the lower support part 214 and the upper support part 212, improving the adhesion between them.

[0084] The easily deformable portion 220 has an upper easily deformable portion 222 and a lower easily deformable portion 224. The upper easily deformable portion 222 is formed of the same material as the support portion 210. The lower easily deformable portion 224 has a compressive elastic modulus smaller than that of the upper easily deformable portion 222.

[0085] When the hardness of the lower easily deformable portion 224 is 5 degrees or more lower than the hardness of the upper easily deformable portion 222, it is preferable that the ratio of the height h22 (see FIG. 34) of the lower easily deformable portion 224 to the height h21 (see FIG. 34) of the easily deformable portion 220 is set to 50% or more. In this way, the difference between the compressive elastic modulus of the support portion 210 and the compressive elastic modulus of the easily deformable portion 220 becomes large, so that the amount of protrusion of the support portion 210 relative to the easily deformable portion 220 is sufficiently ensured.

[0086] The promotion portion 230 has an upper recess 232 and a lower recess 234. As shown in Figures 34 and 35, a top 234t of the lower recess 234 is provided closer to the foot contact surface than a bottom 232t of the upper recess 232.

[0087] 38 and 39, in this embodiment, the lower support portion 214 may be omitted, and the support portion 210 may be formed of a single material (for example, the same material as the upper easily deformable portion 222). The central ground contact portion 110, the inner ground contact portion 121, and the outer ground contact portion 122 may be set to the same thickness. In this case, the volume of the outsole 100, which is relatively heavy, is reduced, thereby reducing the weight of the shoe 1.

[0088] The upper surface of the outsole 100 is preferably formed flat, which makes it easier to bond the outsole 100 to the midsole 200.

[0089] 40 and 41, the upper surface of the support portion 210 may be formed into a curved shape that is convex upward. In the example shown in Fig. 40 and 41, the support portion 210 is inclined so as to become gradually higher toward the rear. In a state in which no load is applied to the support portion 210 and the easily deformable portion 220, the upper surface of the support portion 210 is set higher than the upper surface of the easily deformable portion 220.

[0090] 42, the support portion 210 may be provided at a position that helps form the medial longitudinal arch of the foot. This position is in a region including a part that overlaps in the thickness direction with a center portion P5 (see FIG. 3) of a line segment that connects the head P1 (see FIG. 3) of the first metatarsal bone and the calcaneus P4 (see FIG. 3).

[0091] It should be noted that the embodiments disclosed herein are illustrative in all respects and should not be considered as limiting. The scope of the present invention is indicated by the claims, not by the description of the embodiments above, and further includes all modifications within the meaning and scope of the claims.

[0092] [Aspects] It will be appreciated by those skilled in the art that the exemplary embodiments described above are examples of the following aspects.

[0093] A sole according to one aspect of this disclosure is provided in an area of ​​the sole that includes a portion of the sole that overlaps with the wearer's arch portion in the thickness direction of the sole, and comprises a support portion that supports the wearer's foot so as to assist in the formation of an arch in the sole when a load is applied to the arch portion, and easily deformable portions that are arranged on the inside and outside of the support portion in the width direction of the sole, and the easily deformable portions are raised relative to the easily deformable portions so that the amount of protrusion of the support portion toward the foot contact surface relative to the easily deformable portions when a load is applied to the support portion and the easily deformable portions is greater than the amount of protrusion of the support portion toward the foot contact surface relative to the easily deformable portions when no load is applied to the support portion and the easily deformable portions.

[0094] In this sole, the easily deformable parts are disposed on the inner and outer sides of the support part in the width direction, so that the amount of protrusion of the support part toward the foot contact surface relative to the easily deformable part when a load is applied to the support part and the easily deformable part is greater than the amount of protrusion of the support part toward the foot contact surface relative to the easily deformable part when a load is not applied to the support part and the easily deformable part. Therefore, when a load is applied to the support part and the easily deformable part, the support part effectively assists in the formation of an arch in the arch part of the sole. On the other hand, when a load is not applied to the support part and the easily deformable part, the amount of protrusion of the support part toward the foot contact surface relative to the easily deformable part is smaller than when a load is applied to the support part and the easily deformable part, so the feeling of pressure on the sole is reduced.

[0095] In addition, it is preferable that the deformable portion has a compressive elastic modulus smaller than that of the support portion.

[0096] It is also preferable that the structure further includes a promotion portion provided between the support portion and the easily deformable portion and promoting the protrusion of the support portion toward the contact surface side of the easily deformable portion when a load is applied to the support portion and the easily deformable portion.

[0097] In this case, it is preferable that the promotion portion is configured as a thin-walled portion having a thickness smaller than that of the easily deformable portion.

[0098] For example, the promotion portion is preferably provided with an upper recess having a shape recessed from the foot contact surface side toward the ground contact surface side.

[0099] This reduces contact between the support portion and the easily deformable portion when a load acts on the support portion and the easily deformable portion, making it easier for the support portion to protrude relative to the easily deformable portion.

[0100] Furthermore, it is preferable that the promotion portion is provided with a lower recess having a shape recessed from the ground contact surface side toward the foot contact surface side.

[0101] This increases the flexibility of the promoting portion, making it easier for the supporting portion to protrude relative to the easily deformable portion.

[0102] It is also preferable that the support portion has an upper support portion and a lower support portion that is provided below the upper support portion and has a compressive elastic modulus greater than that of the upper support portion.

[0103] In this way, it is possible to increase the compressive elastic modulus of the entire support portion while suppressing discomfort to the sole of the foot when a load is applied to the support portion and the easily deformable portion, thereby ensuring a greater amount of protrusion of the support portion relative to the easily deformable portion when a load is applied to the support portion and the easily deformable portion.

[0104] In addition, it is preferable that the sole has a midsole including the support portion and the easily deformable portion, and an outer sole having a compressive elastic modulus greater than the compressive elastic modulus of the midsole and connected to the underside of the midsole, and that the lower support portion is formed from the same material as the outer sole.

[0105] It is also preferable that the easily deformable portion has an upper easily deformable portion and a lower easily deformable portion that is provided below the upper easily deformable portion and has a compressive elastic modulus smaller than the compressive elastic modulus of the upper easily deformable portion.

[0106] In this way, when a load is applied to the support portion and the deformable portion, a larger amount of protrusion of the support portion relative to the deformable portion is ensured.

[0107] A shoe according to one aspect of the disclosure also includes the sole and an upper connected to the sole and positioned above the sole. [Explanation of symbols]

[0108] 1 shoe, 10 sole, 20 upper, 30 midsole, 30h through hole, 40 insole, 42 groove, 100 outsole, 110 central ground contact portion, 121 inner ground contact portion, 122 outer ground contact portion, 200 midsole, 210 support portion, 212 upper support portion, 214 lower support portion, 220 easily deformed portion, 222 upper easily deformed portion, 224 lower easily deformed portion, 224a groove portion, 230 promotion portion, 232 upper recess, 232a upper inner surface, 232b upper outer surface, 234 lower recess, 234a lower inner surface, 234b lower outer surface, A arch portion, P ground contact surface, R1 forefoot region, R2 midfoot region, R3 rearfoot region.

Claims

1. A shoe sole, a support portion provided in an area of ​​the sole including a portion that overlaps with the arch portion of the wearer in a thickness direction of the sole, the support portion supporting the wearer's foot so as to assist in the formation of an arch on the sole when a load is applied to the arch portion; Deformable portions arranged on the inner and outer sides of the support portion in the width direction of the sole; A promotion portion is provided between the support portion and the easily deformable portion and promotes the protrusion of the support portion toward the foot contact surface side relative to the easily deformable portion when a load is applied to the support portion and the easily deformable portion. The deformable portion is raised relative to the deformable portion so that the amount of protrusion of the support portion toward the foot contact surface side relative to the deformable portion when a load is applied to the support portion and the deformable portion is greater than the amount of protrusion of the support portion toward the foot contact surface side relative to the deformable portion when a load is not applied to the support portion and the deformable portion, The easily deformable portion is provided in a midfoot region of the sole and has a shape surrounding the single support portion in the midfoot region, The promotion portion is composed of a thin-walled portion having a thickness smaller than a thickness of the easily deformable portion, The promotion portion of the sole is provided with an upper recess having a shape recessed from the foot contact surface side toward the ground contact surface side, and a lower recess having a shape recessed from the ground contact surface side toward the foot contact surface side.

2. The shoe sole according to claim 1 , wherein the deformable portion has a compressive elastic modulus smaller than a compressive elastic modulus of the support portion.

3. The support portion is An upper support portion; 3. The shoe sole according to claim 1, further comprising: a lower support portion provided below the upper support portion and having a compressive elastic modulus greater than that of the upper support portion.

4. A midsole including the support portion and the easily deformable portion; an outsole having a compressive elastic modulus greater than a compressive elastic modulus of the midsole and connected to a lower surface of the midsole; The sole of claim 3 , wherein the lower support portion is formed from the same material as the outsole.

5. The easily deformable portion is An upper easily deformable portion; The sole according to claim 1 , further comprising: a lower easily deformable portion provided below the upper easily deformable portion and having a compressive elastic modulus smaller than that of the upper easily deformable portion.

6. A midsole including the support portion and the easily deformable portion; an outsole connected to a lower surface of the midsole; The outsole includes a central ground contact portion fixed to a lower surface of the support portion, The sole according to claim 1, wherein the central ground contact portion is provided in an area including a portion overlapping in the thickness direction with a center portion of a line segment connecting the heads of the first metatarsal bone and the fifth metatarsal bone of the wearer.

7. A midsole including the support portion, the easily deformable portion, and the promotion portion, The sole of claim 1, wherein the easily deformable portion has a shape extending in the midfoot region from an inner end of the promotion portion in the width direction to an inner edge of the midsole, and extending from an outer end of the promotion portion in the width direction to an outer edge of the midsole.

8. A shoe sole according to any one of claims 1 to 7, an upper connected to the sole and positioned above the sole.

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