Insoles and footwear

Abstract

Provided is an insole 1 that can suppress lateral twisting of the foot. The insole 1 includes a heel support part 4 that supports the heel of the foot. The heel support part 4 is configured such that the repulsive force of the outer part that supports the outer side of the heel is greater than the repulsive force of the inner part that supports the inner side of the heel. The insole 1 also includes an insole body 2 that supports at least the arch and heel of the foot, and an arch support part 3 that is provided on the insole body 2 and supports the arch. The heel support part 4 is provided on the insole body 2.

Description

[Technical field]

[0001] The present invention relates to an insole used as an inner sole of shoes such as sneakers and leather shoes, and to footwear equipped with the insole. [Background technology]

[0002] Conventionally, as an insole for supporting the foot, for example, the configuration described in Patent Document 1 is known. Patent Document 1 describes a configuration that "is a midsole or insole for walking footwear that is flat and made of a cushioned elastic material, and has various recesses and protrusions on the upper surface corresponding to the positions of the sole of the foot, the arch of the foot, etc., and is further configured by combining the midsole or insole with a sole or outsole that has horizontal linear grooves on the surface that contacts the sole of the foot (upper surface) and has circular or elliptical grooves and arc-shaped grooves that convex toward the toes on the ground surface (lower surface)." [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2014-147622 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the insole described in Patent Document 1 has a problem in that it is unable to prevent twisting of the foot in the left-right direction because it is merely configured to support the arch of the foot. [Means for solving the problem]

[0005] The present invention was created in consideration of the above-mentioned circumstances and with the aim of solving these problems, and is an insole characterized in that it has a heel support part that supports the heel part of the foot, and the heel support part is configured so that the repulsive force of the outer part that supports the outside of the heel is greater than the repulsive force of the inner part that supports the inside of the heel. The present invention also relates to footwear having the above-mentioned insole attached thereto as an inner sole. Effect of the Invention

[0006] According to the present invention, twisting of the foot in the left and right direction can be suppressed. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a schematic diagram of an insole according to a first embodiment of the present invention, in which (a) is a plan view, (b) is a front view, (c) is a bottom view, and (d) is a right side view. [Diagram 2] FIG. 2 is a schematic diagram showing the function of the insole according to the first embodiment, where (a) is a diagram showing foot balance, and (b) is a diagram showing foot balance when the insole is used. [Diagram 3] 1A and 1B are schematic diagrams showing the configuration of an insole according to a second embodiment of the present invention, in which (a) is a plan view and (b) is a bottom view. [Figure 4] FIG. 11 is a schematic configuration diagram of the insole according to the second embodiment, in which (a) is a front view and (b) is a right side view. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

[0009] [First embodiment] <Configuration> The insole 1 according to the first embodiment of the present invention shown in Fig. 1 is a corrective insole (heel angle correction pad) used as an inner sole of footwear (shoes) such as sneakers, leather shoes, safety shoes, etc., and is provided as a pair for the left foot and the right foot. As shown in Figs. 1(a) to 1(c), the insole 1 is formed to a size that supports the foot from the arch to the heel. The insole 1 includes a sheet-like insole body 2. The insole body 2 is configured in a two-layer structure in which a highly durable outer material 2b made of, for example, leather is attached to the surface of a sheet-like base material 2a having a predetermined elasticity.

[0010] Here, the base material 2a is made of, for example, EVA (Ethylene-Vinyl Acetate), a material that has both flexibility and elasticity. The outer material 2b may be any material other than leather, such as synthetic leather, cloth, or nonwoven fabric, as long as it is a material that can ensure the durability of the insole body 2, and the insole body 2 may be made of only the base material 2a.

[0011] The pair of insole bodies 2 are formed symmetrically, with the portion supporting the heel (calcaneus C) formed circular, and both sides in the width direction curved in a concave arc from the portion supporting the arch (cuboid B) to the portion supporting the heel. Also, on the back side of the base material 2a of the insole body 2, an arch support portion 3 serving as an arch support portion that supports the arch of the foot, and a heel support portion 4 serving as a heel support portion that supports the heel of the foot are respectively attached.

[0012] The arch support portion 3 is formed in a generally rectangular plate shape with a longitudinal dimension smaller than the width dimension of the portion of the insole body 2 that supports the arch. The arch support portion 3 is attached to the generally central position in the width direction of the insole body 2 with the longitudinal direction of the arch support portion 3 aligned with the width direction of the insole body 2. The heel support portion 4 is formed in a disk shape smaller than the portion of the insole body 2 that supports the heel, and is attached to the central position (concentric) of the portion of the insole body 2 that supports the heel.

[0013] The arch support 3 is formed in a pad shape having a predetermined thickness, and has a three-layer structure in which a sheet-like cushioning material 3c made of rubber-based EVA (blended with rubber agents) is sandwiched between the base materials 3a and 3b, which are a pair of sheets made of EVA. The arch support 3 is formed in a rectangular shape with both longitudinal sides being arc-shaped. In short, the arch support 3 is configured to be attached in a position that supports the arch of the foot from below when the heel side part of the insole body 2 is aligned with the heel part of the footwear and set as the insole of the footwear.

[0014] Next, the heel support part 4 is formed in a substantially disk-like pad shape having a predetermined thickness, and is configured in a three-layer structure with a cushioning material 4c as a sheet-like main body part interposed between a pair of base materials 4a and 4b that are sheets made of EVA. The cushioning material 4c is arranged horizontally (left and right) between the pair of base materials 4a and 4b, with an outer cushioning part 4d as an outer part that supports the outer side of the heel and an inner cushioning part 4e as an inner part that supports the inner side of the heel, and is attached. Approximately one-third of the outer part of the cushioning material 4c is made up of the outer cushioning part 4d, and approximately two-thirds of the inner part of the cushioning material 4c is made up of the inner cushioning part 4e.

[0015] Here, the outer buffer section 4d is made of a sheet-like elastic member having a large repulsive force and elastic force, such as a polyvinyl chloride resin sheet containing a high specific gravity material or a special non-vulcanized rubber. The outer buffer section 4d has a compressive stress of, for example, about 80 mPa. On the other hand, the inner buffer section 4e is made of a rubber-based (rubber-blended) EVA and has a compressive stress of, for example, about 0.07 mPa or 0.17 mPa. In short, the outer buffer section 4d is made of a material having a repulsive force (elastic force, compressive stress) that is about 50 to 1000 times greater than that of the inner buffer section 4e. In other words, the outer buffer section 4d and the inner buffer section 4e are made of materials having different hardnesses.

[0016] The size (occupied area, size) and material (resilience) of the outer and inner buffer parts 4d and 4e are adjusted so that when a consumer of the insole 1 places his / her heel on the heel support part 4 and stands upright, as shown in Fig. 2(b), the left-right balance of the calcaneus C is stabilized, in other words, made horizontal, the tibia and fibula (not shown) are perpendicular to the ground, the knee faces forward, the foot faces straight ahead, and the gap between the calcaneus C and the talus T is reduced. In short, the proportions (occupied area) of the outer and inner buffer parts 4d and 4e are adjusted to correspond to the shape of the foot of the consumer of the insole 1 and the balance of the center of gravity in a standing position, so that twisting of the calcaneus C that may occur during walking is suppressed. In addition, the outer buffer section 4d and the inner buffer section 4e may be configured such that the outer buffer section 4d is made of hard urethane and the inner buffer section 4e is made of soft urethane.

[0017] Furthermore, a mark 4f for distinguishing between the left and right sides of the insole body 2 is attached to the outer side of the heel support part 4, in other words, to the base material 4a located on the lower side. This mark 4f is made of a sealant or the like colored in a conspicuous color such as orange, and is attached to the outer side of each insole 1, in other words, to the base material 4a located on the lower surface side of each heel support part 4, in a position close to the side where the outer buffer part 4d is located, so that the side where the outer buffer part 4d is located can be identified.

[0018] <Action and effect> Next, the effects of the insole 1 according to the first embodiment will be described.

[0019] First, the shape of the foot of the consumer of the insole 1 is measured, the center of gravity balance in a standing position, etc. are measured, and the ratio of the outer buffer section 4d to the inner buffer section 4e of the heel support section 4 is determined so as to suppress twisting of the calcaneus C that may occur when the consumer walks. At this time, depending on the consumer, the shape of the left and right feet or the balance of the left and right centers of gravity may differ, in which case the ratio of the left and right outer buffer sections 4d to the inner buffer sections 4e is made different.

[0020] Specifically, in the case of a consumer whose calcaneus C is tilted left and right when standing without the insole 1, as shown in FIG. 2(a), when the consumer places his / her heel on the heel support portion 4 and stands upright, the balance (size, material) of the outer buffer portion 4d and the inner buffer portion 4e is adjusted so that the left and right balance of the calcaneus C is stable, in other words, horizontal, as shown in FIG. 2(b), the tibia and fibula of the foot are perpendicular to the ground, the knee faces forward, and the foot faces straight ahead (normal position).

[0021] Next, the heel support section 4 is formed so as to have the determined ratio of the outer buffer section 4d to the inner buffer section 4e, and the formed heel support section 4 is attached by, for example, sticking it to the underside of the base material 2a of the insole body 2. The arch support section 3 is attached by, for example, sticking it to the underside of the base material 2a of the insole body 2 so as to be in a position to support the arch of the consumer, thereby forming a pair of left and right insoles 1. At this time, it is preferable to adjust the thickness (height) of the arch support section 3 and the heel support section 4 so that when the consumer places his / her foot on the pair of insoles 1 and stands vertically, the center of gravity of the consumer's foot is the entire sole (slightly leaning forward).

[0022] Then, the created insoles 1 are attached to the existing insoles that are already inserted in the footwear used by the consumer. At this time, the insole bodies 2 of the insoles 1 are placed on the existing insoles so that the heel side portions of the insole bodies 2 overlap the heel portions of the existing insoles.

[0023] Thereafter, by wearing footwear with these insoles 1 placed in place and engaging in daily life, various tasks, or sports, balance adjustment using the arches is possible due to the arches (cuboid bone B) being supported by the arch support parts 3 of these insoles 1. At the same time, the heels (calcaneus C) are supported by the heel support parts 4 of each insole 1, and the lateral twisting of the calcaneus C is suppressed, the calcaneus C is firmly held by the heel support parts 4, both knees face straight forward, and bow-leggedness and crab-leggedness are eliminated, allowing the person to walk with their heels pointing straight forward alternately.

[0024] Therefore, in addition to the support of the cuboid bone B and calcaneus C of each foot by the arch support part 3 and heel support part 4 of each insole 1, the center of gravity of each foot is the entire sole (slightly leaning forward), so the support of the body by both feet becomes more stable and strong, and more power can be exerted. At the same time, blood circulation (blood flow) in the feet is improved, so cold sensitivity is improved and the body feels warmer. In addition, since the support of the body by both feet becomes more stable and strong, it is possible to prevent unexpected falls and sprains and injuries. In addition, the posture when standing is stable (normal state) and the body axis is stabilized, so the load on the body can be reduced and pain in the legs and hips can be reduced.

[0025] Next, an insole 11 according to a second embodiment of the present invention will be described with reference to the drawings.

[0026] [Second embodiment] <Configuration> 3 and 4, an insole 11 according to a second embodiment of the present invention differs from the insole 1 according to the first embodiment described above in terms of the shape of the insole body 21. Note that the same reference numerals are used for configurations common to the first embodiment, and descriptions thereof will be omitted.

[0027] Specifically, the pair of insoles 11 are formed such that the insole body 21 is large enough to support the foot from the toe to the heel. The insole body 21 has a shape in which the periphery of the part supporting the arch to the heel is raised upward in an arc shape. The insole body 21 has a two-layer structure in which a surface material 21b made of, for example, fabric is attached to the surface of a sheet-like base material 21a having a certain elasticity.

[0028] Each base material 21a is made of, for example, EVA. The outer material 21b may be made of any material other than fabric, such as synthetic leather or nonwoven fabric, and the insole body 21 may be made of only the base material 21a. The arch support 3 and heel support 4 are attached by pasting to predetermined positions on the back side of the base material 21a of the insole body 21.

[0029] <Action and effect> As described above, the insole 11 according to the second embodiment can achieve the same effects as the insole 1 according to the first embodiment, and can also achieve the following effects. In short, since the insole body 21 of the insole 11 is formed to a size that supports the foot from the toes to the heel, the consumer can remove the existing insole from the footwear used, and then attach the insole 11 in place of the insole.

[0030] When these insoles 11 are attached as the inner soles of footwear, there is less risk of the arch support portion 3 and heel support portion 4 shifting (moving) inside the footwear. This makes it possible for the arch support portion 3 of these insoles 11 to more reliably support the arch, and for the heel support portion 4 to more reliably suppress lateral twisting of the calcaneus C.

[0031] [others] It should be noted that the present invention is not limited to the above-described embodiments, but includes various modified embodiments. For example, the above-described embodiments are described in order to easily explain the present invention, and the present invention is not necessarily limited to those having all of the configurations described.

[0032] That is, in each of the above embodiments, the arch support part 3 and the heel support part 4 are attached to the back surface of the insole body 2, 21 and protrude from the back surface side, but at least one of the arch support part 3 and the heel support part 4 may be built into the insole body 2, 21 or may be attached by hollowing out the insole body 2, 21. Also, at least one of the arch support part 3 and the heel support part 4 may be attached to the back surface of an existing insole. [Explanation of symbols]

[0033] 1,11 Insole 2,21 Insole body 2a,21a Base material 2b,21b Surface material 3 Arch support part (arch support part) 3a,3b Base material 3c buffer material 4 Heel support part (heel support part) 4a, 4b Base material (sheet body) 4c Cushioning material (main body) 4d External buffer section (outer section) 4e Inner buffer (inner part) 4F Landmark B Cuboid bone C calcaneus T-talus

Claims

1. The shoe is provided with a heel support portion for supporting the heel of the foot, The heel support portion has a substantially disk-shaped main body portion having a predetermined thickness, A region of the main body that supports the outside of the heel is defined as a lateral portion, and a region of the main body that supports the inside of the heel is defined as a medial portion, The outer portion and the inner portion are made of different materials having different hardness so that the repulsive force of the outer portion is greater than that of the inner portion, and the ratio of the outer portion to the inner portion is adjusted so that torsion of the heel bone that may occur during walking is suppressed. An insole characterized by:

2. An insole body that supports at least the arch and heel of the foot; an arch support portion provided on the insole body and supporting the arch portion; The heel support portion is provided on the insole body. The insole according to claim 1 .

3. The arch support portion is formed in a pad shape and attached to the back side of the insole body.

3. The insole according to claim 2.

4. The insole according to any one of claims 1 to 3 is attached as an inner sole. Footwear characterized by:

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