Middle application

Abstract

To obtain an insole for implementing walking with high walking movement efficiency and hardly causing fatigue by supporting kicking using a unique bending guide groove adapted to a metatarsophalangeal joint (MP joint) while coping with troubles before and after childbirth.SOLUTION: A prepartal insole comprises: protrusions for adjusting three arches of a foot, the protrusions formed on the front side to come into contact with the foot; a rear foot part corresponding area 230 having a portion in the vicinity of its center, the portion formed higher than a front foot part corresponding area 210; a long outside inclined area SM formed so that its height increases in a curved shape toward an outer edge of the insole from an approximately straight line LS that passes through at least a fifth metatarsal bone's portion in the vicinity of its center and the portion Pr in the vicinity of the center of the rear foot part corresponding area 230 and reaches a rear end; and an approximately linear bending guide groove Ra on the under side formed so as to be approximately along an MP joint line, a range from a third metatarsal bone to a first metatarsal bone.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to insoles.

Background Art

[0002] The human foot has a very complex biological mechanism. When a person walks, the load on the foot due to the impact on the heel is usually about 1.5 times the person's body weight. When running or carrying additional weight such as a backpack, the load on the foot exceeds three times the body weight. Moreover, especially the Japanese are a people who have difficulty walking straight. If they can walk or run straight, it will put less burden on the legs and body and is also smart. Insoles can absorb / dissipate impact forces, carry body weight and other weights, and provide propulsion force because many bones, muscles, ligaments and tendons in the foot can do so. Therefore, various types of insoles have been sold in recent years. For example, Patent Document 1 discloses that even during intense activities, the insoles have cushioning properties and can provide sufficient support and control foot flexion and torsion. For this control, a recessed area is formed in the forefoot area on the bottom surface so that the flexion direction of the metatarsal head is bent as much as possible in the traveling direction. The desire to walk smartly, walk safely or run smartly does not change even for pregnant women (before and after childbirth). Also, the desire does not change even for people with symptoms such as hallux valgus, flat feet, Morton's foot, ···, bowed legs, etc. In recent years, insoles for footwear for before and after childbirth have been sold. For example, Patent Document 1 states that in order to secure the pelvic birth canal towards childbirth, the pelvic joints are loosened by the action of female hormones, and at the same time, the joints of the whole body skeleton are also loosened.

[0003] Moreover, combined with the growth of the fetus, factors such as weight gain are added, and problems such as pain in the lower limbs and waist occur. Furthermore, due to the swelling of the abdomen, the balance during standing and walking deteriorates, and the risk of falling backward also increases.

[0004] In addition, in order to widen the distance between the left and right feet to maintain balance, it is a prenatal insole (also referred to as a prenatal footbed) that solves problems such as the burden on the muscles that hold this limb position.

[0005] Specifically, in order to adjust the three arches (the transverse arch, the medial longitudinal arch, and the lateral longitudinal arch) of the foot skeleton, a convex portion for the transverse arch, a convex portion for the medial longitudinal arch, and a convex portion for the lateral longitudinal arch are provided on the surface of the insole. These convex portions correct the foot skeleton due to joint looseness and raise the forefoot corresponding region higher than the hindfoot corresponding region, reducing the risk of falling backward.

[0006] In addition, the insole of Patent Document 1 raises the peripheral wall of the hindfoot (including the calcaneus) of the foot. By having these functions, it is possible to widen the distance between the left and right feet so that balance does not need to be taken, and the burden on the muscles that hold this limb position is reduced.

[0007] On the other hand, after childbirth, if the loosened foot skeleton towards childbirth is left as it is, the collapsed skeleton will remain, and orthopedic problems from the waist down will continue to occur even after childbirth.

[0008] Therefore, it is disclosed that a postpartum insole (footbed) should be firmly provided with a convex shape for adjusting the three arches (the transverse arch, the medial longitudinal arch, and the lateral longitudinal arch) in order to obtain an ideal foot skeleton, and the calcaneus part should be made lower than that of the prenatal insole (footbed) so that it can quickly recover to the normal state before pregnancy.

Prior Art Documents

Patent Documents

[0009]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0010] As described above, when a person walks, the knee first protrudes forward and the foot steps out. After the heel touches the ground, the foot is placed on the ground following a trajectory that runs from the little toe side to the thumb side. However, because the knee faces outward, this walking pattern often results in a waddling gait. This walking pattern is particularly prominent in, for example, prenatal pads, postnatal pads, hallux valgus pads, flat foot pads, Morton's pads, ···, O-shaped leg pads (etc.). For example, in a conventional prenatal insole, as the baby in the womb grows larger, the person walks with a curved body, shifting their weight backward. To prevent falling backward, the heel is raised, and the heel portion is formed into a cup-shaped heel corner. However, the shape of the back of the heel varies from person to person, and in some cases, the heel rises steeply from the underside of the heel. It is not easy to mold the R at the rear end of the heel corner of the insole to match the shape of the heel of the foot. Therefore, currently, the R at the rear end of the heel corner is molded to be gentle. As a result, the heel of the foot rests on this R portion, creating a gap between the upper part at the back of the shoe. That is, the foot protrudes slightly forward.

[0011] Furthermore, as the belly grows larger, it becomes difficult to walk with the toes turned inward. Therefore, it is necessary to walk with a splayed gait to maintain balance, gradually changing from a pigeon-toed gait to a normal gait and then to a splayed gait. In particular, during the late stages of pregnancy, a splayed gait is adopted.

[0012] That is, as the body balance changes from the early to the middle and late stages of pregnancy, the foot angle (the direction of the toes) also changes. Walking with a splayed gait causes the following problems. (A) The body sways from side to side while walking. (B) Since the center of gravity moves from side to side, walking becomes unstable. (C) The muscles are burdened.

[0013] On the one hand, for an insole for postpartum use, the part corresponding to the forefoot and the part corresponding to the heel are molded to the same height. However, after childbirth, women often wear high - heeled shoes, so they must be careful not to fall.

[0014] Furthermore, it is important for the foot to maintain three arches by supporting three points: the heel, the ball of the big toe, and the ball of the little toe. However, in reality, when a load is applied, the base of the fifth metatarsal also touches the ground side, so actually it is supported at four points. On the other hand, even for insoles for hallux valgus, flat feet, Morton's foot, ···, O - shaped legs, etc., the heel is made higher, and the heel part is a heel - corner molded in a cup shape. As a result, a gap is formed between the insole and the upper. That is, the foot protrudes slightly forward, which may compress the toes or make the shoes easier to come off. Also, for those who cannot maintain balance without spreading their legs outward, even if they use insoles for hallux valgus, flat feet, Morton's foot, ···, O - shaped legs, etc., they will gradually walk from an inward - turned gait, to a normal gait, and then to an outward - turned gait. The present invention has been made in view of the above problems, etc. In addition to before and after childbirth, for problems such as hallux valgus, flat feet, Morton's foot, ···, O - shaped legs a even if there are such problems, the object is to obtain an insole that can improve the walking exercise efficiency and enable smart walking and running.

[0015] [[ID=|18]]For pre - natal use, as the baby in the belly grows larger, a woman walks with her body arched, so her weight shifts to the back. To prevent falling backward, the heel is made higher, and the heel part is a heel - corner molded in a cup shape. However, the shape of the back of the heel of the foot varies from person to person. There are cases where the heel rises suddenly from the bottom of the heel. It is not easy to mold the R at the rear end of the heel - corner of the insole to match the shape of the heel of the foot. Therefore, currently, the R at the rear end of the heel - corner is molded to be gentle. As a result, the heel of the foot rests on this R part, and a gap is formed between the insole and the upper. That is, the foot protrudes slightly forward.

[0016] Furthermore, as the belly grows, it becomes difficult to walk with the toes pointed inward. Therefore, one must necessarily walk with the legs apart to maintain balance, gradually shifting from walking with the legs together, to a midway stance, and finally to walking with the legs apart. In particular, during the later stages of pregnancy, one walks with the legs apart.

[0017] That is, from the early to the mid and late stages of pregnancy, as the body balance changes, the foot angle (the direction of the toes) also changes. Walking with the legs apart presents the following problems. (A) One tends to walk while swaying the body from side to side. (B) Since the center of gravity moves from side to side, walking becomes unstable. (C) It places a burden on the muscles.

[0018] On the other hand, a postpartum insole molds the part corresponding to the forefoot and the part corresponding to the heel to the same height. However, after childbirth, one often wears high-heel shoes.

[0019] Furthermore, it is important for the foot to support at three points: the heel, the ball of the big toe, and the ball of the little toe, to maintain three arches. However, in reality, when weight is applied, the base of the fifth metatarsal bone also touches the ground side, so it is actually supported at four points. Therefore, a structure that does not concentrate the load is desirable. On the other hand, even for insoles for hallux valgus, flat feet, Morton's foot, ···, knock knees, etc., the heel is raised and the heel part is made into a cup-shaped heel corner. As a result, a gap is created between the upper part. That is, the foot protrudes slightly forward, which may compress the toes or make the shoes easier to fall off. Also, those who cannot maintain balance without walking with the legs apart will gradually shift from walking with the legs together, to a midway stance, and finally to walking with the legs apart, even if they use insoles for hallux valgus, flat feet, Morton's foot, ···, knock knees, etc. The present invention has been made in view of the above problems, etc. and aims to obtain an insole that can improve the efficiency of walking exercise and enable smart walking and running, regardless of whether it is before or after childbirth, or problems such as hallux valgus, flat feet, Morton's foot, ···, knock knees. a Even if there are such problems, the goal is to obtain an insole that can enhance the walking exercise efficiency and enable smart walking and running.

Means for Solving the Problem

[0020] The insole of the present invention is is an insole having a convex portion for adjusting the arch of the foot formed on the surface side in contact with the foot, characterized in that a linear bending guide groove is formed between a location behind the third metatarsal head placement area on the surface side, which is directly behind the third metatarsal head, and a location on the back side of the inner edge facing immediately behind the ball of the big toe area, which is directly behind the ball of the big toe placement area.

Effect of the Invention

[0021] As described above, according to the present invention, even if there are problems such as valgus toe, flat feet, Morton's toe, ···, O-shaped legs, etc., in addition to before and after childbirth, it is possible to walk and run smartly with improved walking exercise efficiency. An insole has been obtained that can support kicking by means of a unique bending guide groove adapted to the metatarsophalangeal joint (MP joint) while coping with problems before and after childbirth, thereby improving walking exercise efficiency and realizing a less tiring walk.

Brief Description of the Drawings

[0022]

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Mode for Carrying Out the Invention

[0023] The present invention is applicable to insoles in general, and particularly has excellent effects on prenatal insoles, postnatal insoles, insoles for hallux valgus, insoles for flat feet, insoles for Morton's foot, ···, insoles for bow legs (etc.). The following embodiments illustrate the embodiments and methods that embody the technical idea (structure, arrangement) of the present invention, and the technical idea of the present invention is not limited to the embodiments and examples disclosed below. The technical idea of the present invention can be variously modified within the scope of the matters described in the claims. In particular, it should be noted that the drawings are schematic and different from the actual ones. In the following, as an example of an insole according to an embodiment of the present invention that can enhance the walking exercise efficiency and enable smart walking and running, prenatal insoles, postnatal insoles, insoles for hallux valgus, insoles for flat feet, insoles for Morton's foot, ···, insoles for bow legs (etc.) will be described in this order. In the following embodiments, special-purpose insoles such as prenatal and postnatal insoles are illustrated and described, but the present invention is also applicable to general insoles. By adding the configuration of the "bending induction groove" of each of the following examples to a general-purpose insole according to the prior art, an insole according to the present invention can be obtained.

[0024] First, Embodiment 1 will be described as a prenatal insole, and Embodiment 2 will be described as a postnatal insole. Also, the prenatal insole and the postnatal insole may be single-layer or multi-layer, but in the following, a multi-layer structure will be used for the description. This embodiment enhances the walking motion efficiency and realizes a less tiring walk by supporting the kicking motion with a flexion-inducing groove adapted to the metatarsophalangeal joint (MP joint) while coping with foot troubles (individually).

[0025] <Embodiment 1: Maternity Insole (Inner Lining)> FIG. 1 is a perspective view of the maternity insole 200 according to Embodiment 1 of the present invention. Regarding FIG. 1, a perspective view of the foot is described above the maternity insole 200 for explanation. The shoe is not shown in FIG. 1. Further, the lower layer member, upper layer member, and surface layer member described later are pressure-bonded to form the maternity insole 200, but in FIG. 1, the lower layer member, upper layer member, and surface layer member are not numbered.

[0026] As shown in FIG. 1, the foot is divided into a forefoot portion 20, a midfoot portion 22, and a hindfoot portion 23. On the other hand, the region where the maternity insole 200 is placed including the forefoot portion 20 of the foot is described as the forefoot corresponding region 210. Also, the region corresponding to the midfoot portion 22 is described as the midfoot corresponding region 220, and the region corresponding to the hindfoot portion 23 is described as the hindfoot corresponding region 230.

[0027] In FIG. 1, the tip shape T of the lower layer member, the ball of the big toe corresponding region BC, and the ball of the little toe corresponding region SB are indicated by a dashed line. Also, the convex portion G for the transverse arch and the region where the vicinity from the center to the base of the fifth metatarsal bone is placed are described as the fifth metatarsal bone depression region M (dashed line). This fifth metatarsal bone depression region M encloses the vicinity from the center to the base of the fifth metatarsal bone by the outer edge of the insole and the convex portion G for the transverse arch. Also, the fifth metatarsal bone depression region M is for not concentrating the foot load applied to the base of the fifth metatarsal bone, and the significance of this will be described later.

[0028] Furthermore, the flexion-inducing groove Ra formed on the back surface side of the insole is shown. This flexion-inducing groove a may be formed by cutting (collectively referred to as the flexion-inducing portion), but in this embodiment, it will be described as a groove.

[0029] Also, the position near the center of the heel-corresponding region is described as the heel-corresponding region center Pr, and the straight line passing through the front end and the rear end of the insole is described as the insole center line Li. Note that the heel-corresponding region center Pr is higher than the forefoot-corresponding region 210 so as not to fall backward. The specific height difference will be described later. Furthermore, a long outer inclined region SM in which the height increases in a curved shape toward the outer edge is formed from the rear foot part 23 to the middle foot part 22 on the surface side. The line at which this outer inclined region SM starts is described as the outer inclined region start line LS.

[0030] As shown in FIGS. 1 and 2, the outer inclined region start line LS is a substantially straight line that starts from the outer edge (KD) of the insole that generally faces near the rear end of the little toe ball corresponding region SB, passes through the fifth midfoot bone depression region, passes near the heel-corresponding region center Pr, and reaches the rear end 200B'.

[0031] FIG. 2 is a plan view of the back surface of the prenatal insole 200. In FIG. 2, the skeleton and the like when looking at the sole of the foot will be shown and described. The description of the same reference numerals as in FIG. 1 will be omitted. Also, in FIG. 2, the straight line passing through near the center of the big toe ball corresponding region BC and near the center of the little toe ball corresponding region SB is described as the big toe ball-little toe ball transverse line Lb. In each of the figures described below, the description of the same reference numerals will be omitted.

[0032] The point where this big toe ball-little toe ball transverse line Lb intersects the outer edge of the insole (the end of the outer edge facing near the center of the little toe ball corresponding region SB) is shown as the outer edge point KB, and the point where it intersects the inner edge (the end of the inner edge facing near the center of the big toe ball corresponding region BC) is shown as the inner edge point KA. Also, the straight line passing through the heel-corresponding region center Pr and "200C" shown in FIG. 2 is called the heel center line La. Also, the rear end of the insole is described as 200B, and the front end is described as 200A. Also, the straight line crossing the heel-corresponding region center Pr of the heel-corresponding region is shown as the heel-corresponding region center transverse line LPr. Next, the foot skeleton will be described. (Foot skeleton) In the embodiment, the foot skeleton is described using the names used in the prosthetic device manufacturing industry instead of anatomical names. The names of the bones used in this embodiment are described below. The forefoot 20 includes the first proximal phalanx 41, the second proximal phalanx 42, the third proximal phalanx 43, the fourth proximal phalanx 44, the fifth proximal phalanx 45, etc. (other bones are not numbered), and is placed on the forefoot corresponding region 210. The midfoot 22 includes the first intermediate cuneiform 51, the second intermediate cuneiform 52, the third intermediate cuneiform 53, the fourth intermediate cuneiform 54, the fifth intermediate cuneiform 55, the first cuneiform 61, the second cuneiform 62, the third cuneiform 63, the cuboid 71, and the navicular 73, and corresponds to the midfoot corresponding region 220.

[0033] The hindfoot 23 includes the talus 77 and the calcaneus 75, and corresponds to the hindfoot corresponding region 230. The protruding part behind the calcaneus 75 is described as the calcaneal tuberosity 76. Next, the lower layer member 250 shown in FIG. 2 will be described. In FIG. 2, the line of the metatarsophalangeal joint (MP joint) is described as "MP".

[0034] (Lower layer member 250) FIG. 2 shows the back surface and indicates that the upper layer member 260 is pressure-bonded to the lower layer member 250. The tip of the lower layer member 250 is described as "T". The shape of the tip of the lower layer member 250 of the prenatal insole 200 is the tip shape T as shown in FIG. 2. That is, the tip shape T wraps around from the outer edge portion KB on the outer side of the foot to the vicinity of the rear end of the small toe ball corresponding region SB (the rear end of the bone of the fifth intermediate cuneiform 55), and further wraps around the vicinity of the rear ends of the bones of the third intermediate cuneiform 53 and the second intermediate cuneiform 52, and passes through the vicinity of the rear end of the hallux ball corresponding region BC (the rear end of the bone of the first intermediate cuneiform 51) in a substantially straight line to reach the inner edge portion KC on the inner side of the foot, forming a mountain wave shape. That is, the range between the La of the tip shape T of the lower layer member 250 and the outer edge extends slightly below the metatarsophalangeal joint (MP joint) and substantially along the joint. Therefore, the kicking out of the foot by the flexion induction groove Ra can be supported more easily.

[0035] Also, in the region corresponding to the calcaneal tubercle 76 on the back surface of the lower layer member 250, a circular depression is formed (hereinafter referred to as the back surface side circular depression 250A). An impact absorber (not shown) is attached to the back surface side circular depression 250A. In addition, in FIG. 2, the outer inclined region start line LS (KD to 200B') on the surface is shown by a broken line. Also, in FIG. 2, near the bone base of the fifth metatarsal bone 55 is described as "D (dotted line): also referred to as the fourth load point". Next, the flexion guiding groove Ra will be described.

[0036] (Flexion guiding groove Ra) The flexion guiding groove Ra is formed at the position shown in FIG. 2 on the back surface of the forefoot corresponding region 210. When the insole is composed of an upper layer member and a lower layer member, it is formed on the back surface of the upper layer member 260. Specifically, it is a groove formed in a substantially straight line from the vicinity of the region corresponding to the head of the third metatarsal bone 53 (also referred to as the vicinity of the third metatarsal bone head corresponding region Pa) through the vicinity of the rear end region of the metatarsal head corresponding region BC to the inner edge Pb of the insole (passing between the tip shape T of the lower layer member 250 and the metatarsal head corresponding region BC).

[0037] The inclination angle θi of this flexion guiding groove Ra with respect to the transverse straight line Lb of the metatarsal head and little toe head is about 5 degrees to 25 degrees (preferably 12 degrees to 15 degrees). Also, compared with the metatarsophalangeal joint (MP joint), it can be said that the flexion guiding groove Ra generally follows a part of the line of the metatarsophalangeal joint (MP joint).

[0038] There are people with varus, intermediate, and valgus. But when not pregnant, even for those with varus or intermediate, when the belly gets big, it will surely open to valgus to maintain balance. Gradually, it changes from varus to intermediate and then to valgus. At that time, the direction of folding with respect to the advancing direction is this angular direction. The toe angle, which is the angle at which a line perpendicular to the direction of travel intersects the insole center line Li, is the angle of the foot with respect to the direction of travel during walking. The toe angle is an important alignment element, and an external rotation of 7 to 13 degrees is considered normal. The toe angle during a woman's normal period is 0 to 5 degrees, but during the late pregnancy, it becomes more everted with the toes pointing outward, so it becomes larger, reaching about 5 to 15 degrees.

[0039] Therefore, if an oblique groove "flexion induction groove Ra" is provided in the area near the rear of the ball-of-the-foot corresponding area BC, the insole is more likely to flex toward the thumb side (slightly inward direction), so it is easier to kick out inward, making walking easier and less tiring. Since the flexion induction groove Ra reduces the flexion resistance and supports the inward kick-out, the effect of the outer inclination area SM also works simultaneously to enhance the synergistic effect.

[0040] Note that the area near the corresponding area Pa of the third midfoot bone may be between the rear of the bone of the second midfoot bone 52 or the rear of the bone of the third midfoot bone 53.

[0041] (When viewed from the heel side) Next, the case of viewing the prenatal insole 200 from the heel side (Q direction) will be described with reference to FIG. 3. When viewed from the heel side (Q direction), as shown in FIG. 3, in the prenatal insole 200, the edge portion at the rearmost end of the heel (the central portion in FIG. 3) is lower in height. In FIG. 3, the heel center line La is drawn vertically. Also, a vertical line extending vertically upward and downward from 200B´ is denoted as the outer inclination rear end vertical line Lf. Further, the surface of the prenatal insole 200 is indicated by a broken line (hereinafter denoted as the surface W).

[0042] Next, specific dimensions will be exemplified. However, the description will be made assuming a foot size of 23 cm. Note that the dimensions vary depending on the width of the foot, the shoes worn, etc., so the dimensions described below are just an example. When viewed from the heel side direction (Q direction), the distance from the center Pr of the heel corresponding area to the outer edge is amm (33 mm to 38 mm: preferably 35 mm), the distance from the rear end 200B' to the inner edge is bmm (18 mm to 23 mm: preferably 20 mm), and the distance between the center Pr of the heel corresponding area and the rear end 200B' is fmm (3 mm to 8 mm: preferably 5 mm).

[0043] Also, the height on the outer edge side is ha (19 mm to 24 mm: preferably 21 mm), the height on the inner edge side is hb (13 mm to 18 mm: preferably 16 mm), and the height hc of the center Pr of the heel corresponding area is hc mm (10 mm to 15 mm: preferably 12 mm) from the back surface. That is, the height is biased.

[0044] Next, the effects when using the prenatal insole 200 of the present embodiment will be described below with reference to FIGS. 4 and 5. Note that FIG. 5 shows a longitudinal cross-section near the insole center line Li.

[0045] (Effects when using the prenatal insole 200) However, the effects of the bending induction groove Ra will be described later. FIG. 4 is an explanatory diagram when the prenatal insole 200 is used in a shoe and the foot is inserted, and the rear side of the heel of the upper 300 is removed and viewed from the heel direction. Note that FIG. 4 shows the insole 320 of the shoe and the outsole 340. These are preferably made of a rubber material or the like.

[0046] As shown in FIG. 4, the height of the rear end of the prenatal insole 200 is low, and as shown in FIG. 5, the upper 300 of the heel of the shoe and the heel of the foot fit tightly, so the foot will not come out when walking. Therefore, it is safe. Next, the prenatal insole 200 will be described in more detail.

[0047] (Details of the prenatal insole 200) FIG. 6 is a detailed explanatory view of the prenatal insole 200. FIG. 6(b) is a top view, FIG. 6(a) is a side view when viewed from the outside of the foot, and FIG. 6(c) is a side view when viewed from the inside of the foot. In these figures, the description of the parts with the same reference numerals as those in the above figures is omitted.

[0048] Also, the fifth metatarsal bone lifting area is denoted as HM, and the surface of the epidermis is denoted as W. Also, the height of the forefoot corresponding area is described as hg (about 5 mm). Further, in FIG. 6(b), the outer inclination area SM is indicated by dot hatching. This outer inclination area SM further enhances the effect of guiding the center of gravity inward during walking, and the effect is further enhanced in combination with the bending induction groove Ra.

[0049] As shown in FIGS. 6(a) and 6(b), the lower layer member 250, the upper layer member 260, and the cushion member 270 are pressure-bonded, and the epidermis 280 is attached onto the cushion member 270. The lower layer member 250, the upper layer member 260, and the cushion member 270 are pressure-bonded with different thicknesses, and the lower layer member 250 has the highest hardness.

[0050] As shown in FIG. 6(b), the rear foot corresponding area 230 is higher than the forefoot corresponding area 210, so as to prevent falling backward. Note that the height near the apex PA of the convex portion G for the transverse arch is made to be about the height of the outer edge portion facing this apex PA. Also, the height of the portion corresponding to the between the second metatarsal bone head and the third metatarsal bone head of the convex portion G for the transverse arch is made to be slightly higher than the height of the forefoot corresponding area 210.

[0051] Next, each cross-section of FIG. 6(b) will be described with reference to FIG. 7. In FIG. 7 as well, the description of the parts with the same reference numerals as those in the above figures is omitted. FIG. 7(a) shows the A - A cross-section of FIG. 6(b), FIG. 7(b) shows the B - B cross-section of FIG. 6(b), FIG. 7(c) shows the C - C cross-section of FIG. 6(b), FIG. 7(d) shows the D - D cross-section of FIG. 6(b), and FIG. 7(e) shows the E - E cross-section of FIG. 6(b).

[0052] The description will be given in the order from the E-E cross-section to the A-A cross-section. As shown in Fig. 7(e), in the E-E cross-section, there is a shock absorber 255 attached to the back side of the lower member 250. Also, in the E-E cross-section, the outer edge of the lower member 250 increases substantially linearly from near the heel center line La(Pr) and forms part of the SM. On the other hand, the inner edge is flat and has a cross-section that rises near the inner edge.

[0053] And, the intermediate layer part that forms the base of the corner surrounding the midfoot corresponding region 220 and the rearfoot corresponding region 230 is crimped. In the E-E cross-section, the outer edge side is described as "245A" and the inner edge side is described as "245B".

[0054] That is, "245A" of this intermediate layer member 245 and the lower member 250 form part of the outer inclined region SM in the E-E cross-section. Note that the lower member 250 or the upper member 260 may be used to form the base of the corner surrounding the midfoot corresponding region 220 and the rearfoot corresponding region 230, but providing the intermediate layer member 245 can provide elasticity and cushioning.

[0055] In the D-D cross-section of Fig. 7(d), the intermediate layer member 245 extends across the inner edge and the outer edge. And, the lower member 250 and the intermediate layer member 245 increase in height toward the outer edge and form part of the outer inclined region SM. Note that the height hab of the outer edge in the D-D cross-section of Fig. 7(d) is 18 mm (16 mm to 21 mm: preferably 18 mm), and the height hbb of the inner edge is 19 mm (17 mm to 22 mm: preferably 19 mm).

[0056] The C-C cross-section of Fig. 7(c) includes the cross-section of the region corresponding to near the bone base of the fifth metatarsal bone 55 in the fifth metatarsal depression region M, and since it is the deepest part in the fifth metatarsal depression region M, the bone base of the fifth metatarsal bone 55 is wrapped. Also, the inner edge side is near the apex of the convex part for the medial longitudinal arch.

[0057] That is, the inner edge side is higher. Specifically, it is hbc (18 mm to 23 mm: preferably 19.5 mm). Also, the height of the deepest part in the fifth metatarsal depression region M is hm (4 mm to 7 mm: preferably 5 mm). Since this part is the deepest part, the fifth metatarsal lifting region HM can be seen in front (indicated by a dotted line). Also, the height of the inner edge in this C-C cross section is hac (13 mm to 18 mm: preferably 15 mm).

[0058] On the other hand, the B-B cross section in Fig. 7(b) is a cross section near the vertex PA of the convex part G for the transverse arch, and the fifth metatarsal depression region M becomes thinner and becomes the fifth metatarsal lifting region HM. That is, the range from near the center of the fifth metatarsal 55 to the rear end of the head of the fifth metatarsal 55 is raised. The height of the inner edge is hbd (13 mm to 18 mm: preferably 15 mm), and the height of the outer edge is had (10 mm to 15 mm: preferably 12 mm). That is, considering the B-B cross section to the E-E cross section, Fig. 6(a), and Fig. 1, a long outer inclined region SM is formed in which the height increases in a curved shape from the outer inclined region start line LS (also referred to as a substantially straight line) passing through near the center of the fifth metatarsal 55 and near the center of the rear foot corresponding region 230 on the surface side to the outer edge.

[0059] And in the A-A cross section of Fig. 7(a), it is a cross section of the front foot corresponding region 210, and the heights of both edges are hg (4 mm to 9 mm: preferably 5 mm). It is the surface where the upper member 260 contacts the insole of the shoe. That is, the height of the deepest part in the fifth metatarsal depression region M is hm (4 mm to 7 mm: preferably 5 mm), which is about the height of the front foot corresponding region 210 (it may be slightly lower).

[0060] Therefore, when the prenatal insole 200 of the present embodiment is used in a shoe and walked, since one does not sway the body from side to side while walking, walking does not become unstable. As a result, the burden on the muscles can be suppressed, so it is optimal as a prenatal insole.

[0061] <Embodiment 2: Postpartum use> Figure 8 is a perspective view of the postnatal insole 400 of the second embodiment. Similar to FIG. 1, a perspective view of the foot is shown on the upper side. In FIG. 8, the tip shape of the lower layer member (450) of the postnatal insole 400, the ball-of-the-big-toe corresponding region BC, and the ball-of-the-little-toe corresponding region SB are indicated by a dashed line. Also, in order to distinguish it from the prenatal one, the convex portion for the transverse arch is denoted as "GB", and the fifth metatarsal bone depression region is denoted as "Ma". Further, the postnatal insole 400 has a bending guide groove Ra formed on the back surface in the same manner as in the embodiment.

[0062] Also, in order to distinguish and explain the center of the heel corresponding region, which is near the center of the heel corresponding region of the postnatal insole 400, from the prenatal one, it is denoted as "Pf", and the center line of the insole passing through the tip 400A and the rear end 400B of the insole is denoted as "Lf". Also, in order to distinguish it from the prenatal one as much as possible, different symbols (including numbers) are used for the explanation. Note that the height of the center Pf of the heel corresponding region of the postnatal insole 400 and the height of the forefoot corresponding region 210 are made approximately the same, and the outer inclination region SM is not formed. That is, the rear foot corresponding region (230) is substantially flat.

[0063] Figure 9 is a plan view of the back surface of the postnatal insole 400. As shown in FIG. 9, the tip shape TB of the lower layer member 450 passes substantially linearly from the inner edge Ta to the vicinity of the rear end of the head of the first metatarsal bone 51, passes through the vicinity of the rear ends of the heads of the second metatarsal bone 52 and the third metatarsal bone 53, passes through the outer edge side near the center of the fifth metatarsal bone 55, and wraps around the bone base of the fifth metatarsal bone 55 to reach the inner edge Ta in a shape like a cliff mountain. Therefore, the fifth metatarsal bone 55 and its bone base do not become painful.

[0064] Next, the case where the postnatal insole 400 is viewed from the heel side direction (QB direction) will be described with reference to FIG. 10. (When viewed from the heel side) When viewed from the heel side direction (QB direction), as shown in FIG. 10, for the postpartum insole 400, the height of the rear end portion of the heel corner is low as in the first embodiment, and the convex portion GB for the transverse arch is higher (for example, about 13 mm) and larger with respect to the prenatal insole 200, indicating that this convex portion GB for the transverse arch can be seen.

[0065] Next, specific dimensions will be exemplified. When viewed from the heel side direction (QB direction), the height of the point PAr on the outer edge through which the center transverse line LPr of the heel corresponding region passes is hb1 (10 mm to 15 mm: preferably 13 mm), and the height of the point PBr on the inner edge is about the same height ha1. Also, the height of Pf is hf (8 mm to 13 mm: preferably 9 mm), which is lower than that of the prenatal insole 200.

[0066] Therefore, when walking with the postpartum insole 400 of the present embodiment used in shoes, the burden on the muscles can be suppressed, so it is optimal as a postpartum insole.

[0067] Next, the effects when using the postpartum insole 400 of the second embodiment will be described below with reference to FIG. 11.

[0068] (Effects when using the postpartum insole 400) However, the effects of the flexion induction groove Ra will be described later. For postpartum use, it is assumed that shoes with a normal heel height (for example, 3.5 cmm) are used, and the description will be given with the number "500" attached. FIG. 11 is an explanatory view when the foot is inserted into a shoe using the postpartum insole 400 and viewed from the heel direction with the rear side of the heel portion of the upper 510 removed. Note that FIG. 11 shows the midsole 520 and the outsole 530 of the shoe.

[0069] As shown in FIG. 11, for the postpartum insole 400, the height of the rear end portion is low, and as in the first embodiment, the upper 510 and the heel portion of the foot fit firmly, so the foot does not come out when walking. Therefore, it is safe. Next, the postpartum insole 400 will be described in more detail.

[0070] (Details of the Postpartum Insole 400) FIG. 12 is a detailed explanatory view of the postpartum insole 400. FIG. 12(b) is a top view, FIG. 12(a) is a side view when viewed from the outer side of the foot, and FIG. 12(c) is a side view when viewed from the inner side of the foot. For those with the same reference numerals as in the above figures in these figures, the description will be omitted.

[0071] Also, in FIGS. 12(a) and 12(c), the surface of the epidermis at Lf in FIG. 12(b) is denoted as WB. Also, the height hg1 in the forefoot corresponding region and the height of Pf are about the same. Further, FIG. 12(b) shows the convex portion GB for the transverse arch, the convex portion GBC for the medial longitudinal arch, and the convex portion GBD for the lateral longitudinal arch. Note that the apex of the convex portion GB for the transverse arch is between the vicinity of the center of the second middle metatarsal bone 52 and the vicinity of the center of the third middle metatarsal bone 53, and its height is made about the same as the height of the inner edge portion facing the apex of the convex portion GB for the transverse arch. As shown in FIGS. 12(a) and 12(b), the lower layer member 450, the upper layer member 460, and the cushion member 470 are pressure-bonded, and the epidermis 480 is attached onto the cushion member 470. Also, as shown in FIG. 12(c), the apex of the convex portion GB for the transverse arch is made about the same height as the inner edge portion opposing this apex.

[0072] As shown in FIGS. 12(a) and 12(c), the heights of the forefoot corresponding region and the heel corresponding region are about the same. Also, the rearfoot corresponding region is flat. Next, each cross-section of FIG. 12(b) will be described with reference to FIG. 13. Also in FIG. 13, the description will be omitted for those with the same reference numerals as in the above figures. FIG. 13(a) shows the Aa - Aa cross-section of FIG. 12(b), FIG. 13(b) shows the Ba - Ba cross-section of FIG. 12(b), FIG. 13(c) shows the Ca - Ca cross-section of FIG. 12(b), FIG. 13(d) shows the Da - Da cross-section of FIG. 12(b), and FIG. 13(e) shows the Ea - Ea cross-section of FIG. 12(b).

[0073] The explanation will be given in the order from the Ea-Ea cross-section to the Aa-Aa cross-section. As shown in Fig. 13(e), in the Ea-Ea cross-section, there is a shock absorber 440 attached to the rear circular depression provided on the back side of the lower member 450. In the Ea-Ea cross-section, the outer edge side is described as "450A" and the inner edge side is described as "450B".

[0074] The height of the outer edge side is ha2, and the height of the inner edge hb2 is each 10 mm to 15 mm (preferably 12 mm), and the height of Pf is hpf (about 10 mm). In the Da-Da cross-section of Fig. 13(d), the height of the outer edge is ha3 (9 mm to 14 mm: preferably 12 mm), and the height of the inner edge is hb3 (8 mm to 14 mm: preferably 11 mm).

[0075] The Ca-Ca cross-section of Fig. 13(c) includes the cross-section of the fifth metatarsal depression region Ma, which is the deepest part in the fifth metatarsal depression region Ma. Similar to Embodiment 1 (before childbirth), the bone bottom of the fifth metatarsal 55 is wrapped. Specifically, the height of the outer edge side is ha4 (7 mm to 12 mm: preferably 8 mm), and the height of the inner edge side is hb4 (12 mm to 17 mm: preferably 15 mm).

[0076] Also, the height of the deepest part in the fifth metatarsal depression region Ma is hm (5 mm to 8 mm: preferably 6 mm). Since this part is the deepest part, the fifth metatarsal lifting region HM can be seen in the front (indicated by a dotted line).

[0077] The Ba-Ba cross-section of Fig. 13(b) is the cross-section near the apex of the convex part GB for the transverse arch, and the fifth metatarsal depression region Ma becomes shallow and becomes the fifth metatarsal lifting region HM (for example, about 10 mm). That is, the range from near the center of the fifth metatarsal 55 to the rear end of the head of the fifth metatarsal 55 is raised.

[0078] Note that the height of the inner edge is hb5 (13 mm to 18 mm: preferably 15 mm), and the height of the outer edge is ha5 (10 mm to 15 mm: preferably 12 mm).

[0079] And in the Aa - Aa cross - section of FIG. 13(a), it is the cross - section of the part of the forefoot corresponding region 210, and the height of both edges is hg1 (4 mm to 9 mm: preferably 5 mm). The surface where the upper member 460 contacts the insole of the shoe. That is, the fifth metatarsal bone base corresponding region is made to be about the height of the forefoot corresponding region 210.

[0080] Also, in the case of postpartum use, by having Ma, the fourth load point which is the base of the fifth metatarsal bone is firmly secured.

[0081] That is, when a load is applied, this fourth load part (the base of the fifth metatarsal bone: D) is made so that the load does not concentrate (the part where the base of the fifth metatarsal bone is placed is finished to be as thin as possible).

[0082] Although the above - mentioned FIG. 5 shows that the upper 300 and the heel part of the foot fit firmly, the details were insufficiently explained, so it will be further explained in more detail using FIG. 14. FIG. 14 is a view seen from the inner side of the foot when a prenatal insole 200 for the right foot is put into a shoe for the right foot and this right foot is placed on this prenatal insole 200.

[0083] However, in FIG. 14, the prenatal insole 200 is shown in a cross - section along the insole center line Li of the prenatal insole 200 shown in FIG. 1 in the same way as in FIG. 5. Also, the inner edge (dotted line) and the outer edge at the heel corner of the prenatal insole 200 for the right foot when seen from the inner side of the foot are shown, indicating that the inner edge is higher than the outer edge.

[0084] As described above, the height of the rear end 200B of the prenatal insole 200 is low. Specifically, as shown in FIG. 14, the position where the inner edge (also referred to as the inner side edge) and the outer edge (also referred to as the outer side edge) of the rear foot corner descend toward 200B (indicated by the line LpB) is LBr (18 mm to 25 mm: preferably about 20 mm) from the center Pr of the heel corresponding region. Note that the insole for prenatal or postnatal use may be used for ballet shoes.

[0085] <Embodiment 3> The above-mentioned bending guide groove Ra (depth: 1 mm to 2.5 mm: preferably 1.5 mm) is formed on the back side of the insole. Insoles for hallux valgus countermeasures, flat foot countermeasures, insoles for hallux valgus countermeasures, insoles for flat foot countermeasures, insoles for metatarsalgia countermeasures, insoles for Morton's neuroma countermeasures, insoles for knee pain countermeasures, insoles for knock knee countermeasures, insoles for plantar fasciitis countermeasures, and other insoles for walking, running, etc. will be described below. Note that the bending guide groove Ra has a depth of 1 mm to 2.5 mm (preferably 1.5 mm), a length of 45 mm to 65 mm (when the insole length is 230 mm, about 50 mm is preferable), and a width of about 3 mm to 5.5 mm (when the insole length is 230 mm, about 3 mm is preferable).

[0086] [Top view of hallux valgus countermeasures, ··· plantar fascia countermeasures] FIG. 15 is a top view of an insole for hallux valgus countermeasures and Morton's neuroma countermeasures. FIG. 15(a) shows a top view of the insole 600 for hallux valgus countermeasures, and FIG. 15(b) shows a top view of the insole 700 for flat foot countermeasures. FIG. 16 is a top view of an insole for metatarsalgia countermeasures and flat foot countermeasures. FIG. 16(a) shows a top view of the insole 800 for metatarsalgia countermeasures, and FIG. 16(b) shows a top view of the insole 900 for Morton's neuroma countermeasures.

[0087] FIG. 17 is a top view of an insole for knee pain countermeasures and low back pain countermeasures. FIG. 17(a) shows a top view of the insole 1000 for knee pain countermeasures, and FIG. 17(b) shows a top view of the insole 1100 for low back pain countermeasures. FIG. 18 is a top view of an insole for O-shaped leg countermeasures and plantar fasciitis countermeasures. FIG. 18(a) shows a top view of the insole 1200 for O-shaped leg countermeasures, and FIG. 18(b) shows a top view of the insole 1300 for plantar fasciitis countermeasures.

[0088] In these figures, in order to show that the flexion induction groove Ra is formed on the back side, it is described by a dotted line. Also, the outline of the foot is described as "F", and the outline of the depression where the heel rests in the heel corresponding area is IBa (hereinafter referred to as the heel placement outline IBa). In addition, in this embodiment, in order to distinguish and explain before and after childbirth, the convex part for the transverse arch is described as the convex part CA for the transverse arch, the convex part for the medial longitudinal arch is described as the convex part CB for the medial longitudinal arch, and the convex part for the lateral longitudinal arch is described as the convex part CD for the lateral longitudinal arch.

[0089] Also, in the metatarsophalangeal joint (MP joint), the part passing between the head of the first metatarsal bone 51 (also referred to as the first metatarsal head) and the base of the first phalanx bone 41 (also referred to as the base of the first phalanx bone), and between the head of the second metatarsal bone 52 (also referred to as the second metatarsal head) and the base of the second phalanx bone 42 (also referred to as the base of the second phalanx bone) is referred to as the MP main flexion line part in this embodiment and is described as "MPe" in the figure.

[0090] (Countermeasures for hallux valgus) Hallux valgus is a symptom in which the big toe of the foot bends in a "く" shape in the direction of the index finger. That is, hallux valgus is induced by the first phalanx bone being pushed and the metatarsophalangeal joint being valgus. Therefore, it is corrected or prevented by lifting the transverse arch of the foot and narrowing the space between the metatarsal bones. At the same time, it is important that convex shapes are provided to adjust the three arches of the foot, namely the transverse arch, the medial longitudinal arch, and the lateral longitudinal arch, in order to prevent the collapse of the bone structure in other parts. On the other hand, in order to walk or run smartly, the above-mentioned flexion induction groove Ra is formed on the back side, and the rear end portion is formed lower in order to prevent the forward displacement of the foot and the slipping off of the shoe.

[0091] Hereinafter, the insole 600 for hallux valgus countermeasures will be described with reference to FIG. 15(a). In the figure, those with the same reference numerals as above will not be described again. In FIG. 15(a), the upper member is described as the upper member 620 for hallux valgus. The lower member will be described with reference to FIG. 19 which will be described later. Note that the upper member 620 for hallux valgus has the epidermis (surface material such as non-woven fabric or natural leather) pressure-bonded to the entire surface, but the epidermis is not shown in FIG. 15(a). Also, in FIG. 15(a), although the lower member is not visible, its contour line is described as "IFa: shown at the tip edge".

[0092] As shown in FIG. 15(a), on the surface side, a convex portion CA for the transverse arch, a convex portion CB for the medial longitudinal arch, and a convex portion CD for the lateral longitudinal arch, which adjust the three arches of the foot, are formed by bulging. Note that the black circles at the leading ends of the lead lines of "CA", "CB", and "CD" indicate the vicinity of their vertices. The vertex of the convex portion CA for the transverse arch is between the vicinity immediately behind the head of the second metatarsal bone and the vicinity immediately behind the head of the third metatarsal bone on the side corresponding to the forefoot of the black circle of "CA". Also, the location of the inner edge facing the black circle of "CB" is the vertex of the convex portion CB for the medial longitudinal arch. Further, the location of the inner edge opposing the black circle of the convex portion CD for the lateral longitudinal arch is the vertex of the convex portion CD for the lateral longitudinal arch. The convex portion CA for the transverse arch is a drip-shaped one provided with a vertex (not shown) between the vicinity immediately behind the head of the second metatarsal bone 52 and the vicinity immediately behind the head of the third metatarsal bone 53. The size of this convex portion CA for the transverse arch is, for example, about 40 to 60 mm in width, m process about 60 to 80 mm in length, and about 15 to 17 mm in height of the vertex.

[0093] The convex portion CB for the medial longitudinal arch is formed at the location of the inner edge on the inner side of the foot. Specifically, it is, for example, in a shape like a half of a leaf, and the size is about 35 to 55 mm in width is m and so on. Also, the length is, for example, about 80 to 110 mm (from the vicinity of the head of the first metatarsal bone 51 to the inner side of the calcaneus 75 (near the sustentaculum tali)), and the height of the vertex is about 14 to 16 mm (about 13 mm for a size of 230 mm). Furthermore, the convex portion CD for the outer longitudinal arch is formed around the front side of the calcaneus 75 at the outer edge. Specifically, for example, it has a smaller shape than the convex portion CB for the inner longitudinal arch. Its size is such that the width is, for example, 10 - 18 mm, the length is, for example, 35 - 40 mm, and the height of the apex is, for example, about 10 - 12 mm. These convex portions are connected by smooth curved surfaces.

[0094] That is, the convex portion CA for the transverse arch has a height of the apex similar to (slightly lower than) the height of the apex of the convex portion CB for the inner longitudinal arch and is higher than the apex of the convex portion CD for the outer longitudinal arch. Note that a flexion - guiding groove Ra is formed on the back side, facing the MPe part of the metatarsophalangeal (MP) joint of the middle phalanx. The effect of this will be described later. Specifically, this flexion - guiding groove Ra is a linear groove formed between the location directly behind the head of the third metatarsal bone where the head of the third metatarsal bone is placed and the location on the back side of the inner edge that faces immediately behind the area of the ball of the big toe where the ball of the big toe is placed. That is, this flexion - guiding groove Ra extends linearly obliquely from the location Pa corresponding to the head of the third metatarsal bone 53 through immediately behind the head of the first metatarsal bone 51 to the location Pb on the inner edge.

[0095] Also, the metatarsophalangeal (MP) joint has the point at the end of the inner edge described as "Km2" and the point at the end of the outer edge described as "Km1". Also, a contour line "IFa" is formed so as to surround the base of the fifth metatarsal bone 55. That is, it is designed to prevent pain at the base of the fifth metatarsal bone 55 during running and walking. Furthermore, the corner surrounding the rear - foot corresponding area is described as the hallux valgus rear - foot corner 600c, the corner on the outer edge is described as the hallux valgus outer corner 600a, and the corner on the inner edge is described as the hallux valgus inner corner 600b. Note that the rear end of the hallux valgus rear - foot corner 600c is low.

[0096] (Flatfoot) Flatfoot is said to refer to a condition where the "arch" structure on the sole of the foot collapses and the sole of the foot becomes substantially flat. The "arch" is an arch-shaped structure that efficiently supports body weight. If it progresses, the foot may deform and cause walking difficulties. That is, in flatfoot, the medial longitudinal arch drops and the entire foot pronates. Therefore, by forming a bulge that supports it under the vicinity behind the sustentaculum tali of the calcaneus from near the head of the first midfoot bone around the navicular bone that constitutes the apex of the medial longitudinal arch, it can be corrected or prevented. The insole 700 for flatfoot countermeasures will be described below with reference to Fig. 15(b). In the figure, those with the same reference numerals as above are omitted from the description. Specifically, the convex portion CA for the transverse arch is lower than the apex of the convex portion CB for the medial longitudinal arch and the apex of the convex portion CD for the lateral longitudinal arch. In Fig. 15(b), the upper layer member is described as the upper layer member 720 for flatfoot. The lower layer member will be described with reference to Fig. 20, which will be described later.

[0097] Note that in Fig. 15(b) as well, the epidermis is not shown. Also, in Fig. 15(b), although the lower layer member is not visible, its contour line is described as "IFb: shown at the leading edge". As shown in Fig. 15(b), similar to Fig. 15(a), on the surface side, a convex portion CA for the transverse arch, a convex portion CB for the medial longitudinal arch, and a convex portion CD for the lateral longitudinal arch are formed to adjust the three arches of the foot. The height of the convex portion CA for the transverse arch at the location corresponding to between the head of the second midfoot bone and the head of the third midfoot bone is slightly higher than the height of the forefoot corresponding region, and it is an inclined surface for flatfoot countermeasures with the edge in the outer edge direction being about the height of the forefoot corresponding region. The leading edge of IFb of the convex portion CA for the transverse arch is made not to reach the fifth midfoot bone 55, and it goes around the bone base of the fifth midfoot bone 55 and reaches the outer edge. Also, the corner surrounding the rear foot corresponding region is described as the rear foot corner 700c for flatfoot, the corner of the outer edge is described as the outer corner 700a for flatfoot, and the corner of the inner edge is described as the inner corner 700b for flatfoot. Note that the rear end of the rear foot corner 700c for flatfoot is low.

[0098] (Metatarsal Headache Relief) Chronic pain at the base of the second toe, rather than the big toe, is called metatarsalgia. Metatarsalgia occurs when the metatarsophalangeal joint is destroyed by rheumatism or other factors, causing the transverse arch of the foot to drop, concentrating pressure on the heads of the second and third metatarsals and resulting in pain. This can be corrected or prevented by creating a concave shape to relieve pressure so that this area is lower than the heads of the first and fifth metatarsals. At the same time, it is important to have a convex shape that aligns the three arches (transverse arch, medial longitudinal arch, and lateral longitudinal arch) to prevent the collapse of other parts of the skeleton.

[0099] The insole 800 for preventing metatarsal headache will be described with reference to Figure 16(a). In this figure, the same reference numerals as those used above will not be described. In FIG. 16(a), the upper layer member is referred to as a metatarsal head upper layer member 820, and will be described in detail later. Although the upper layer member 820 for metatarsal joint pain has a surface (a surface material such as nonwoven fabric or natural leather) pressed onto the entire surface, the surface is not shown in Figure 16(a). In addition, in FIG. 16(a), although the lower layer member is not visible, its outline is described as "IFc: shown at the leading edge." In FIG. 16(a), the insole 800 for treating metatarsal headache has a special shape of IFc, so to distinguish it from the others, the convex portion for the transverse arch will be referred to as a convex portion for the transverse arch for metatarsal headache CAa.

[0100] As shown in Figure 16(a), the surface is similarly formed with a convex portion CAa for the transverse arch of the metatarsal head, a convex portion CB for the medial longitudinal arch, and a convex portion CD for the lateral longitudinal arch, which align the three arches of the foot. The apex of the convex portion CAa for the transverse arch of the metatarsal head is located between the center of the second metatarsal bone 52 and the center of the third metatarsal bone 53. Also, the region corresponding to the portion between the head of the first intermediate metatarsal bone 51 and the base of the first proximal phalanx 41, and the region corresponding to the portion between the head of the fifth intermediate metatarsal bone 55 and the base of the fifth proximal phalanx 45 are formed as convex portions (hereinafter referred to as convex region portions) having a step of, for example, 2 to 5 mm from the upper surface of the corresponding region of the front foot portion of the upper member 820 for intermediate metatarsal bone head pain.

[0101] That is, as shown in FIG. 16(a), the IFc is substantially U-shaped passing near the upper side of the base of the first proximal phalanx 41, winding around the inside of the head of the first intermediate metatarsal bone 51, winding around the vicinity of the center (from the head) of the second intermediate metatarsal bone 52 and the third intermediate metatarsal bone 53, passing obliquely through the head of the fourth intermediate metatarsal bone 54, passing through the inside of the head of the fifth intermediate metatarsal bone 55 and winding around the vicinity of the base of the fifth proximal phalanx 45 to reach the outer edge. That is, the central part is concave on the rear side.

[0102] The convex portion CAa for the transverse arch for intermediate metatarsal bone head pain is in the shape of a drip, with a vertex (not shown) provided between the vicinity immediately behind the head of the second intermediate metatarsal bone 52 and the vicinity immediately behind the head of the third intermediate metatarsal bone 53. The size is, for example, a width of about 40 to 60 m m process and a length of about 60 to 80 mm, and the height of the vertex is about 12 to 15 mm, for example. The convex portion CB for the medial longitudinal arch is specifically in a shape like a half-leaf of a tree, and the size is a width of, for example, 35 to 55 mm (about the inside of the second cuneiform bone 62 from the inner edge).

[0103] Also, the length is, for example, 80 to 110 mm (from the vicinity of the head of the first intermediate metatarsal bone 51 to the inside of the calcaneus 75 (near the sustentaculum tali)), and the height of the vertex is about 15 to 17 mm, for example (about 13 mm for a size of 230 mm). Furthermore, the convex portion CD for the lateral longitudinal arch is formed around the front side of the calcaneus 75 at the outer edge. Specifically, it is in a shape smaller than the convex portion CB for the medial longitudinal arch, for example, with a width of about 10 to 18 mm, a length of about 35 to 40 mm, and a vertex height of about 10 to 12 mm. These convex portions are connected by smooth curved surfaces to each other.

[0104] That is, the convex portion CAa for the transverse arch for metatarsal head pain has a vertex height that is slightly lower than the vertex height of the convex portion CB for the medial longitudinal arch and higher than the vertex of the convex portion CD for the lateral longitudinal arch. The effect of the flexion induction groove Ra on the back side that faces the MP main flexion line portion MPe of the metatarsophalangeal joint (MP joint) will be described later. is done na Also, the contour line "IFc" at the tip is made into a substantially U shape, but it may be a shape like that in FIG. 7 of Japanese Patent No. 3977771. That is, it may be any shape that does not cover at least the head of the second metatarsal bone 52 and the head of the third metatarsal bone 53.

[0105] Note that, similar to the above, a flexion induction groove Ra is formed on the back side that faces the MP main flexion line portion MPe of the metatarsophalangeal joint (MP joint). The effect of this will be described later. Also, in FIG. 16(a), the corner surrounding the rear foot corresponding region is described as the rear foot corner 800c for metatarsal head pain, the corner on the outer edge is described as the outer corner 800a for metatarsal head pain, and the corner on the inner edge is described as the inner corner 800b for metatarsal head pain. Note that the rear end of the rear foot corner 800c for metatarsal head pain is low.

[0106] (Measures against Morton's neuroma) Therefore, by holding the convex portion CA for the transverse arch so as to widen the space between the heads of the third metatarsal bone 53 and the fourth metatarsal bone 54, the pain is reduced by removing the nerve compression. The insole 900 for Morton's neuroma countermeasures will be described with reference to FIG. 16(b). In the figure, those with the same reference numerals as above will not be described again.

[0107] In FIG. 16(b), the upper layer member is described as the upper layer member 920 for Morton's neuroma. The lower layer member will be described later. Note that the upper layer member 920 for Morton's neuroma has the epidermis (surface material such as non-woven fabric, natural leather, etc.) pressure-bonded to the entire surface, but the epidermis will not be described. Also, in FIG. 16(b), although the lower layer member is not visible, its contour line is described as "IFd: shown at the tip edge".

[0108] As shown in FIG. 16(b), on the surface side, similar to the above, a convex portion CA (drip type) for the transverse arch, a convex portion CB for the medial longitudinal arch, and a convex portion CD for the lateral longitudinal arch that adjust the three arches of the foot are formed by bulging. This convex portion CA (drip type) for the transverse arch has a width of, for example, 40 to 60 mm and does not reach the head of the first metatarsal bone 51 and the fifth metatarsal bone 55. The length is, for example, about 60 to 80 mm, and the height of the apex (a location slightly behind the head of the third metatarsal bone and a location slightly behind the head of the fourth metatarsal bone) is, for example, about 14 to 16 mm, so as to slightly lift the transverse arch of the foot. That is, the apex of the convex portion CA for the transverse arch is between the vicinity immediately behind the head of the third metatarsal bone and the vicinity immediately behind the head of the fourth metatarsal bone, and its height is about the same as the height of the apex of the convex portion of the medial longitudinal arch.

[0109] Thereby, pain can be reduced by removing nerve compression. The convex portion CB for the medial longitudinal arch has a height of the apex of, for example, about 15 to 17 mm (about 13 mm for a size of 230 mm). Note that a flexion induction groove Ra is formed on the back surface side, facing the MPe portion of the main flexion line of the metatarsophalangeal joint (MP joint). The effects of this will be described later. Also, a contour line "IFd" at the tip is formed so as to surround the base of the fifth metatarsal bone 55. That is, it is designed so that the base of the fifth metatarsal bone 55 does not become painful during running and walking.

[0110] Furthermore, the corner surrounding the rear foot corresponding region is described as the Morton rear foot corner 900c, the corner on the outer edge is described as the Morton outer corner 900a, and the corner on the inner edge is described as the Morton inner corner 900b. Also, similar to the above, the rear end of the Morton rear foot corner 900c is low. Note that the contour line "IFd" at the tip may have a shape as shown in FIG. 13 of Japanese Patent No. 3977771. (Measures against knee pain) Knee pain is caused by, for example, osteoarthritis, where the medial meniscus in the knee joint is damaged, the knee joint becomes varus, and pain occurs. Therefore, in order to correct the hindfoot by turning it outward, a long inclined surface is formed from near the center of the fifth metatarsal 55 to near the center of the calcaneus 75, and an external force is applied that causes the entire lower leg to tilt inward, widening the medial gap of the knee joint and correcting or preventing this. The knee pain prevention insole 1000 will be described with reference to Figure 17(a). In this figure, the same reference numerals as those used above will not be described.

[0111] 17(a), the upper layer member is referred to as an upper layer member for knee pain relief 1020. The lower layer member will be described later. As in the above, the upper layer member 1020 for treating knee pain has a surface (surface material such as nonwoven fabric or natural leather) pressed onto the entire surface, but the surface is not shown in FIG. 17(a). In addition, in FIG. 17(a), although the lower layer member is not visible, its outline is described as "IFe: shown at the leading edge."

[0112] As described above, the surface side is formed with raised portions for the transverse arch CA, the medial longitudinal arch CB, and the lateral longitudinal arch CD, which align the three arches of the foot. The width, length, and apex height of these portions are similar to those shown in Figure 15(a). The apex of the transverse arch apex CA is located between the center of the second metatarsal bone 52 and the center of the third metatarsal bone 53. These protrusions are mainly formed by the upper layer member, which will be described later. In Fig. 17(a), the tip of the contour line is indicated as "IFe". As shown in Figure 17(a), the tip edge IFe wraps around the inside of the head of the first metatarsal bone 51, wraps around the area immediately behind the heads of the second metatarsal bone 52 and the third metatarsal bone 53, passes diagonally behind the head of the fourth metatarsal bone 54, passes near the center of the fifth metatarsal bone 55, and reaches the outer edge.

[0113] In addition, a rear inclined area (not shown) for knee pain prevention is formed on the rear surface of the lower layer member to correct the rear foot by everting it outward. This rear inclined area for knee pain prevention will be described later. This inclined surface for knee pain prevention applies an external force that causes the entire lower leg to tilt inward, widening the medial gap of the knee joint and making it possible to correct or prevent knee pain.

[0114] As in the above, a flexion-inducing groove Ra is formed on the back surface, facing the MP main flexion line portion MPe of the metatarsophalangeal joint (MP joint). The effect of this will be described later. In Figure 17(a), the corners surrounding the rear foot area are referred to as rear corners 1000c, the outer edge corners are referred to as outer corners 1000a for knee pain relief, and the inner edge corners are referred to as inner corners 1000b for knee pain relief. The rear end of the rear foot corner 1000c for knee pain relief is low. The shape of the upper layer member may be similar to that shown in Figure 7 of Japanese Patent No. 3977771.

[0115] (Back pain prevention) Lower back pain can occur for a variety of reasons, but pain increases when the pelvis tilts forward and the lumbar lordosis increases. For this reason, by lowering the rear foot lower than the front foot, the pelvis tilts backward, reducing pain. The insole 1100 for preventing lower back pain will be described with reference to Figure 17(b). In this figure, the same reference numerals as those used above will not be described. In Fig. 17(b), the upper layer member is referred to as upper layer member for relieving lower back pain 1120. The lower layer member will be described later. Although a surface layer (a surface material such as nonwoven fabric or natural leather) is pressed onto the entire surface, the surface layer is not shown in Fig. 17(b). In addition, in FIG. 17(b), the lower layer member is hidden by the skin, but its outline is written as "IFf: shown at the leading edge." As mentioned above, the surface is formed with raised portions for the transverse arch CA, the medial longitudinal arch CB, and the lateral longitudinal arch CD, which align the three arches of the foot. Of these, the width, length, and height of the apex, excluding the transverse arch CB, are similar to those in Figure 15(a).

[0116] The height of the apex of the transverse arch convex portion CA is about 6 mm (when the size is 23 mm). As shown in Fig. 17(b), the tip edge IFf extends from a position facing the bone base of the first metatarsal bone 41 of the inner edge, loops around immediately behind the head of the first middle metatarsal bone 51, loops around the vicinity immediately behind the heads of the second middle metatarsal bone 52 and the third middle metatarsal bone 53, and then loops around the bone base of the fifth middle metatarsal bone 55 so as not to reach it, and reaches a point on the outer edge facing the head of the fifth metatarsal bone 45, forming a shape like this. Also, the height between the vicinity of the center of the second middle metatarsal bone 52 and the vicinity of the center of the third middle metatarsal bone 53 of the convex portion CA for the transverse arch is slightly higher than the height for flat feet, and it is an inclined surface for preventing low back pain with the height of the edge in the outer edge direction being about the height of the forefoot corresponding region.

[0117] Note that, similarly to the above, a flexion induction groove Ra is formed on the back surface side, facing the MPe part of the main flexion line of the metatarsophalangeal joint (MP joint). The effects of this will be described later. Also, in Fig. 17(b), the corner surrounding the rear foot corresponding region is described as the low back pain rear foot corner 1100c, the corner of the outer edge is described as the low back pain outer corner 1100a, and the corner of the inner edge is described as the low back pain inner corner 1100b. The rear end of the low back pain rear foot corner 1100c is low. Also, the shape of the upper layer member may be the same as that in Fig. 11 of Japanese Patent No. 3977771.

[0118] (Countermeasure for X-shaped legs) X-shaped legs refer to a state where both knee joints are valgus, which may lead to conditions such as osteoarthritis of the knee joint due to aesthetic problems and excessive load on the inner side of the knee joint. Therefore, in order to correct by externally rotating the midfoot to the rear foot, an inclined region (X-shaped leg inclined region: not shown) is formed from a point facing the vicinity of the center of the cuboid bone 71 on the inner edge of the back surface to the rear end of the heel. By this, an external force is applied to cause the entire lower leg to fall inward, and the knee joint is induced in the externally rotating direction.

[0119] The insole 1200 for X-shaped leg countermeasure will be described with reference to Fig. 18(a). In the figure, those with the same reference numerals as above will not be described again. In Fig. 18(a), the upper layer member is described as the upper layer member 1220 for X-shaped legs. Also, the lower layer member will be described later. Note that although the upper surface of the O-shaped leg upper member 1220 has a skin (surface material such as non-woven fabric or natural leather) crimped to the entire surface, the skin is not described in Fig. 18(a).

[0120] Also, in Fig. 18(a), although the lower member is not visible, its contour line is described as "IFg: shown at the tip edge". On the surface side, similar to the above, a convex portion CA for the transverse arch, a convex portion CB for the medial longitudinal arch, and a convex portion CD for the lateral longitudinal arch, which align the three arches of the foot, are formed by bulging. The width, length, and vertex height of the convex portion CB for the medial longitudinal arch and the convex portion CD for the lateral longitudinal arch are about the same as those in Fig. 15(a). However, the vertex of the convex portion CA for the transverse arch is about 4 mm to 5 mm (when the size is 230 mm). As shown in Fig. 18(a), the tip edge IFg starts from a position facing the head of the first metatarsal bone of the inner edge, goes around immediately behind the head of the first metatarsal bone 51, goes around near immediately behind the heads of the second metatarsal bone 52 and the third metatarsal bone 53, passes obliquely behind the head of the fourth metatarsal bone 54, passes slightly below the vicinity of the center of the fifth metatarsal bone 55, and reaches the outer edge facing this vicinity.

[0121] Also, an inclined surface (O-shaped leg inclined region, not shown) is formed on the lower member to correct the rear foot by eversion. That is, an O-shaped leg inclined region is formed to apply an external force that causes the entire lower leg to fall inward and guide the knee joint in the eversion direction. Note that a flexion induction groove Ra is formed on the back side, similar to the above, facing the MPe of the metatarsophalangeal joint (MP joint). The effect of this will be described later. Also, in Fig. 18(a), the corner surrounding the rear foot corresponding region is described as the O-shaped leg rear foot corner 1200c, the outer corner is described as the O-shaped leg outer corner 1200a, and the inner corner is described as the O-shaped leg inner corner 1200b. The above O-shaped leg inclined region is preferably the inclined region shown in Figs. 2, 4, and 5 of Japanese Patent No. 6467141. That is, on the back side, an inclined area is provided in the range from the inside of the foot near the rear end of the midfoot corresponding area to the outside of the foot of the rear foot corresponding area opposite to the straight line (La) connecting the inside of the foot near the rear end of the rear foot corresponding area to a position closer to the inside of the foot. The thickness of this inclined region gradually increases from the line (La) toward the outside of the foot, and the height of the surface on the outside of the foot is about 30% higher than the surface on the inside of the foot that faces the outside of the foot.

[0122] (Plantar fasciitis treatment) Plantar fasciitis and heel spurs are caused by repeated tension on the plantar fascia, which causes pain mainly at the site of attachment to the calcaneus and on the inside of the plantar fascia, and also causes bone spurs to form at the bottom of the calcaneus where the plantar fascia attaches, causing pain.For this reason, the concave shape relieves pressure on the area where the bone spurs have formed, preventing unnecessary tension from being applied to the plantar fascia.

[0123] The insole 1300 for preventing plantar fasciitis will be described with reference to Figure 18(b). In this figure, the same reference numerals as those used above will not be described. 18(b), the upper layer member is referred to as an upper layer member for plantar fasciitis 1320. The lower layer member will be described later. Although a surface layer (a surface material such as nonwoven fabric or natural leather) is pressed onto the entire upper surface of the upper layer member for plantar fasciitis 1320, the surface layer is not shown in FIG. 18(b). In addition, in FIG. 18(b), although the lower layer member is not visible, its outline is described as "IFh: shown at the leading edge."

[0124] As mentioned above, the surface is formed with raised portions for the transverse arch CA, the medial longitudinal arch CB, and the lateral longitudinal arch CD, which align the three arches of the foot. The width, length, and apex height of the medial longitudinal arch CB and the lateral longitudinal arch CD are similar to those shown in Figure 15(a). However, the apex of the convex part CA for the transverse arch is about 6 mm to 8 mm. As shown in Fig. 18(b), the leading edge IFh goes around from the position facing the head of the first metatarsal bone 51 of the inner edge to immediately behind the head of the first metatarsal bone 51, then goes around near immediately behind the heads of the second metatarsal bone 52 and the third metatarsal bone 53, passes obliquely behind the head of the fourth metatarsal bone 54, passes slightly below the vicinity of the center of the fifth metatarsal bone 55, and reaches the outer edge facing this vicinity of the center.

[0125] In addition, in the rear foot corresponding region, an oval depression (hereinafter referred to as the depression Ta for countermeasures against the plantar fascia edge) is formed. This depression Ta for countermeasures against the plantar fascia edge may be circular, elliptical, or in the shape of a bronze bell as in Japanese Patent No. 6609222. This depression Ta for countermeasures against the plantar fascia edge is for protecting the fascia starting part of the plantar fascia that radially extends from near the calcaneal tuberosity of the heel bone of the foot. Also, the lower layer member may have a shape as shown in Fig. 5 of Japanese Patent No. 3977771. Note that, similarly to the above, a flexion induction groove Ra is formed on the back side facing the MP main flexion line part MPe of the metatarsophalangeal joint (MP joint). The function and effect of this will be described later. Also, in Fig. 18(b), the corner surrounding the rear foot corresponding region is described as the rear foot corner 1300c for plantar fasciitis, the outer corner is described as the outer corner 1300a for plantar fasciitis, and the inner corner is described as the inner corner 1300b for plantar fasciitis. Note that the rear end of the rear foot corner 1300c for plantar fasciitis is low.

[0126] [Details of each insole] Next, the detailed structures of the insole for hallux valgus countermeasures, the insole for flatfoot countermeasures, the insole for metatarsal head pain countermeasures, the insole for Morton's countermeasures, the insole for knee pain countermeasures, the insole for X-shaped legs countermeasures, and the insole for plantar fasciitis countermeasures will be described. (Details of the insole 600 for hallux valgus countermeasures) Fig. 19 is a detailed explanatory view of the insole 600 for hallux valgus countermeasures. Fig. 20 is a cross-sectional view of each part when the insole 600 for hallux valgus countermeasures in Fig. 19 is viewed from the heel direction. FIG. 19(a) is a rear view of the hallux valgus countermeasure insole 600, and FIG. 19(b) is a side view when viewed from the inner side direction of FIG. 19(a). Further, FIG. 19(c) is a cross-sectional view taken along the line A7-A7 of FIG. 19(a). This A7-A7 is a straight line connecting the tip 600A and the rear end 200B of the hallux valgus countermeasure insole 600, and is also referred to as the hallux valgus insole center line Laa. Note that the description of the same reference numerals as those in the above figures is omitted.

[0127] As shown in FIGS. 19(a), 19(b), and 19(c), the hallux valgus use The upper member 620 for hallux valgus is pressure-bonded onto the lower member 610 (urethane). Also, the dotted line in FIG. 19(a) is a line ALa that the lower member 610 for hallux valgus is bent to the front side to form the outer corner, inner corner, and heel corner. Also, in FIG. 19(a), the metatarsal head corresponding region BC and the little toe ball corresponding region SB on the front side are shown by a one-dot chain line. Also, since the flexion induction groove Ra is formed on the back surface, it is shown by a solid line. Also, a straight line passing through the center of the metatarsal head corresponding region BC and the center of the little toe ball corresponding region SB on the back surface is denoted as Lbc.

[0128] The inclination angle θi of the flexion induction groove Ra with respect to the straight line Lbc crossing the metatarsal head and little toe ball is 5 degrees to 25 degrees (it may also be 30 degrees to 32 degrees), the same as before and after childbirth. Further, the direction of viewing from the heel direction is denoted as FB1. In FIG. 19(b), the height da10 (14 mm to 18 mm: preferably about 15 mm) at which the inner corner is maximum when viewed from the inner side direction is shown. Also, the height near the heel when viewed from the inner side direction is denoted as da8 (13 mm to 17 mm: preferably 16.5 mm). Then, the height is decreased from a position Eb near (behind PIa) at a location LEb (7 mm to 12 mm: preferably 10 mm) from the rear end 600B to reach the rear end 600B. From PIa to the rear end 600B, it is about 38 mm (LPE).

[0129] Also, as shown in Figure 19(c), the height of the forefoot corresponding area is da1 (e.g., 1.5 mm to 3.0 mm), the height of the apex of the transverse arch convex portion CA is da3 (e.g., 9.77 mm), and the height of the heel corresponding area is da7 (e.g., 3.67 mm), so the heights of the forefoot corresponding area and the forefoot corresponding area are almost the same. Also, the height of the rear end 600B is da9 (for example, 4.0 mm), which is very low. As shown in FIG. 19(c), since the view is taken from the A7-A7 direction in FIG. 19(a), the upper surface AU of the outer corner is visible. The height of this outer corner is da5 (for example, 12 mm).

[0130] Next, the insole 600 for preventing hallux valgus shown in Figure 19 as viewed from the heel and cross-sectional views of each part will be described with reference to Figure 20. However, explanations of the same reference numerals as those in the above figures will be omitted. Figure 20(a) shows the same a 20(a), the height of the rear end 600B is very low (da9: for example, 4.0 mm), so the transverse arch convex portion CA is visible. Figure 20(b) shows the same a 20(b), the cross section of FIG. 19( a ) The area around the A1-A1 cross section is the area corresponding to the forefoot, and use Since the lower layer member 610 does not exist, the height da2 is 1.5 mm to 2.3 mm (preferably 2.17 mm). Figure 20(c) is Figure 19( a This is a cross-sectional view of the A2-A2 section of the foot when viewed from the front. This part corresponds to the midfoot area, so it is difficult to see the hallux valgus. use The lower layer member 610 is present and is thick near the apex of the transverse arch convex portion CA, with a height da4 of approximately 8.5 mm (8.0 mm to 9.0 mm: preferably 8.5 mm) (the apex of the transverse arch convex portion CA is slightly visible).

[0131] In addition, since the area is near the apex of the convex portion CB for the inner longitudinal arch, the inner edge of the convex portion CB for the inner longitudinal arch is high. Furthermore, as shown in Fig. 15 ( a ), it has been described that the contour line "IFa" at the tip is formed so as to surround the bone base of the fifth metatarsal bone 55. Since the A2-A2 cross section includes the cross section of the region where the fifth metatarsal bone 55 is placed, as shown in Fig. 20(c), the thickness between the convex portion CA for the transverse arch and the outer edge is also thin, and its height is about 3.0 mm (2.8 mm to 3.5 mm: preferably 3.0 mm) (the fifth metatarsal bone depression region M). Fig. 20(d) is a cross-sectional view when viewed from the front in the A3-A3 cross section of Fig. 19 ( a ). Since this portion is close to the rear foot corresponding region, the thickness is also thin, and its height da6 is (4.5 mm to 5.0 mm: preferably 4.8 mm). For this reason, the convex portion CA for the transverse arch looks large.

[0132] Fig. 20(e) is a cross-sectional view when viewed from the front in the A4-A4 cross section of Fig. 19 ( a ). Since this portion is between the PIa in the rear foot corresponding region and the rear end 600B, the thickness is also thin, and its height is da12 (3.5 mm to 4.0 mm: preferably 3.69 mm). For this reason, the convex portion CA for the transverse arch and the convex portion CB for the inner longitudinal arch look large.

[0133] (Details of the orthotic insole 700 for flatfoot prevention) Fig. 21 is a detailed explanatory view of the orthotic insole 700 for flatfoot prevention. Fig. 22 is a cross-sectional view of each part when the orthotic insole 700 for flatfoot prevention in Fig. 21 is viewed from the heel direction. Fig. 21(a) is a rear view of the orthotic insole 700 for flatfoot prevention, and Fig. 21(b) is a side view when viewed from the inner side direction of Fig. 21(a). Also, Fig. 21(c) is a cross-sectional view in the B7-B7 direction of Fig. 21(a). This B7-B7 is a straight line connecting the tip 700A and the rear end 700B of the orthotic insole 700 for flatfoot prevention, and is also referred to as the center line Lab of the insole for flatfoot. Regarding the same reference numerals as in the above figures, the description is omitted.

[0134] As shown in FIGS. 21(a), 21(b), and 21(c), the upper member 720 for flat feet is pressure-bonded onto the lower member 710 (urethane) for flat feet. Also, as shown in FIG. 21(a), a bending induction groove Ra similar to the above is formed on the back surface. Further, the direction of viewing from the heel direction is described as FB2. FIG. 21(b) describes that the height at which the inner corner is maximum when viewed from the inner side is db10 (14 mm to 18 mm: preferably about 15 mm). Also, the height near the heel when viewed from the inner side is described as db8 (13 mm to 17 mm: preferably 16.5 mm). And the height is decreased from the vicinity of point Eb (behind PIa) of LEb (7 mm to 12 mm: preferably 10 mm) from the rear end 700B to reach the rear end 700B. From PIa to the rear end 700B, it is about 38 mm (LPE).

[0135] Also, as shown in FIG. 21(c), the height of the forefoot corresponding region is db1 (for example, 1.5 mm), the height near the apex of the convex portion CA for the transverse arch is db3 (for example, 6.82 mm), the height of the heel corresponding region is db7 (for example, 3.6 mm), and the height of the rear end 700B is db9 (for example, 4.0 mm). Note that, as shown in FIG. 21(c), since it is viewed from the B7 - B7 direction of FIG. 20(a), the upper surface AU of the outer corner is visible. The height of this outer corner is db5 (for example, 11.5 mm). Next, with reference to FIG. 22, the case of viewing the insole 700 for flat feet countermeasures in FIG. 21 from the heel direction and cross-sectional views of each part will be described. However, the description of the same reference numerals as in the above figures will be omitted.

[0136] FIG. 22(a) is a front view when viewed from the FB2 direction (heel direction) of FIG. 2 1 ( a ) As shown in FIG. 22(a), since the height of the rear end 700B is very low (db9: for example, 4.0 mm), the convex portion CA for the transverse arch is visible. However, since the apex of the convex portion CA for the transverse arch of the insole 700 for flat feet countermeasures has a low height, it is diagonal from the inner edge.

[0137] Figure 22(b) is a cross-sectional view when viewed from the front at the B1-B1 cross-section of Figure 21( a ). As shown in Figure 22(b), the vicinity of the B1-B1 cross-section of Figure 21( a ) corresponds to the front foot area, and since there is no flat foot lower layer member 710, the height db2 is about 2.17 mm. Figure 22(c) is Figure 21( a ) is a cross-sectional view when viewed from the front at the B2-B2 cross-section. Since this part corresponds to the midfoot area, there is a flat foot lower layer member 710, and since it is near the apex of the transverse arch convex portion CA, it also has a thickness. The height db4 is about 6.6 mm (6.0 mm to 7.0 mm: preferably 6.6 mm) (the transverse arch convex portion CA and the inner longitudinal arch convex portion CB are clearly visible).

[0138] Also, since it is near the apex of the inner longitudinal arch convex portion CB, the inner edge of the inner longitudinal arch convex portion CB is high.

[0139] Furthermore, in the above Figure 16( b ), it was explained that the contour line "IF d " at the tip is formed so as to surround the bone base of the fifth metatarsal bone 55. Since the B2-B2 cross-section includes the cross-section of the area where the fifth metatarsal bone 55 is placed, as shown in Figure 22(c), the thickness between the transverse arch convex portion CA and the outer edge is also thin, and the height is about 3.0 mm (2.8 mm to 3.5 mm: preferably 3.0 mm) (the fifth metatarsal bone depression area M).

[0140] Figure 22(d) is a cross-sectional view when viewed from the front at the B3-B3 cross-section of Figure 21( a ). Since this part is close to the rear foot corresponding area, it is slightly thinner than the B2-B2 cross-section, and the height db6 is (4.5 mm to 5.0 mm: preferably 5.5 mm). However, since the height of the apex of the transverse arch convex portion CA of the flat foot countermeasure insole 700 is low, the transverse arch convex portion CA is slightly visible.

[0141] Figure 22(e) is a) It is a sectional view when viewed from the front in the B4 - B4 cross - section. Since this part is between the PIa in the rear - foot corresponding area and the rear end 700B, the thickness is also thin, and its height is db12 (3.5 mm to 4.0 mm: preferably 3.6 mm). Therefore, even if the height of the apex of the convex part CA for the transverse arch of the insole 7,000 for flat - foot countermeasure is low, the convex part CA for the transverse arch and the convex part CB for the medial longitudinal arch look large.

[0142] (Details of the insole 8,000 for metatarsalgia countermeasure) Fig. 23 is a detailed explanatory view of the insole 8,000 for metatarsalgia countermeasure. Fig. 24 is a sectional view of each part when the insole 8,000 for metatarsalgia countermeasure in Fig. 23 is viewed from the heel direction (e.g., FB3). Fig. 23(a) is a rear - view of the insole 8,000 for metatarsalgia countermeasure, Fig. 23(b) is a side - view when viewed from the inner - side direction of Fig. 23(a). Also, Fig. 23(c) is a cross - section in the C7 - C7 direction of Fig. 23(a). This C7 - C7 is a straight line connecting the front end 800A and the rear end 800B of the insole 8,000 for metatarsalgia countermeasure, and is also referred to as the insole center line Lac for metatarsalgia. Regarding the same reference numerals as in the above figures, the description is omitted.

[0143] As shown in Figs. 23(a), 23(b), and 23(c), for the metatarsal bone An upper - layer member 820 (urethane) for metatarsalgia is pressure - bonded onto the lower - layer member 810 for metatarsalgia of the insole 8,000 (urethane) for metatarsalgia countermeasure. bone Also, as shown in Fig. 23(a), a bending - induction groove Ra similar to the above is formed on the back surface. Furthermore, the direction of view from the heel direction is described as FB3. FIG. 23(b) describes that the height at which the inner corner is maximized when viewed in the inner direction is dc10 (14 mm to 17 mm; preferably about 15 mm). Also, the height near the heel when viewed from the inside is described as dc8 (10 mm to 13 mm; preferably 12.0 mm). And the height is decreased from the vicinity of point Eb (behind PIa) of LEb (7 mm to 12 mm; preferably 10 mm) from the rear end 800B to reach the rear end 800B. From PIa to the rear end 800B, it is about 36 mm (LPE). Note that in FIG. 23(c), the stepped portion near the small toe ball corresponding region SB is described as CAe.

[0144] Also, as shown in FIG. 23(c), the height of the forefoot corresponding region is dc1 (for example, 1.5 mm), the height near the apex of the convex portion for the transverse arch is dc3 (for example, 10.56 mm), the height of the heel corresponding region is dc6 (for example, 2.24 mm), and the height of the rear end 800B is dc9 (for example, 3.4 mm). Note that as shown in FIG. 23(c), since it is viewed from the C7-C7 direction of FIG. 23(a), the upper surface AU of the outer corner is visible. The height of this outer corner is dc5 (for example, 11.5 mm). Next, FIG. 24 is used to (a) describe the insole 800 for countermeasure against midfoot bone bone pain when viewed from the heel direction and the cross-sectional views of each part. However, the description of the same reference numerals as those in the above figures is omitted. Also, for the convex portion for the transverse arch, in FIG. 24, it is described as CAa. FIG. 24(a) is a front view when viewed from the FB3 direction (heel direction) of FIG. 23( a ). As shown in FIG. 24(a), the height of the rear end 800B has is very low (dc9: for example, 3.0 mm), so the convex portion CAa for the transverse arch for midfoot bone pain is visible. FIG. 24(b) is a cross-sectional view when viewed from the front in the C1-C1 cross-section of FIG. 23( a ). As shown in FIG. 24(b), the vicinity of the C1-C1 cross-section of FIG. 23( a ) is the portion of the midfoot corresponding region, but the leading edge IFc of the lower layer member 810 for midfoot bone pain is in the middleSince the center split is in a substantially U-shaped concave on the rear side, the lower layer member 810 for metatarsalgia exists only on the inner and outer sides. Figure 24( a ) The thickness of the upper layer member 820 for metatarsalgia in the C1-C1 cross-section is thin, and its height dc2 is about 2.11 mm.

[0145] Figure 24(c) is a cross-sectional view when viewed from the front in the C2-C2 cross-section of Figure 23( a ). Since this part is the part of the midfoot corresponding region, the lower layer member 810 for metatarsalgia exists, and since it is near the apex of the convex portion CAa for the transverse arch for metatarsalgia, it also has a thickness, and its height dc4 is about 10.4 mm) (for metatarsalgia use The heights of the convex portion CAa for the transverse arch and the convex portion CB for the medial longitudinal arch are high). Also, since it is near the apex of the convex portion CB for the medial longitudinal arch, the inner edge of the convex portion CB for the medial longitudinal arch is high.

[0146] Figure 24(d) is a cross-sectional view when viewed from the front in the C3-C3 cross-section of Figure 23( a ). Since this part is close to the rearfoot corresponding region, it is slightly thinner than the C2-C2 cross-section, and its height d c (3.0 mm). The convex portion CAa for the transverse arch for metatarsalgia of the insole 800 for metatarsalgia countermeasures can also be seen clearly. Figure 24(e) is a cross-sectional view when viewed from the front in the C4-C4 cross-section of Figure 23( a ). Since this part is the part between the PIa of the rearfoot corresponding region and the rear end 800B, the thickness is also thin, and its height is dc12 (2.3 mm). Therefore, the convex portion CAa for the transverse arch for metatarsalgia and the convex portion CB for the medial longitudinal arch can be seen clearly.

[0147] (Details of the insole 900 for Morton's neuroma countermeasures) Figure 25 is a detailed explanatory view of the insole 900 for Morton's neuroma countermeasures. Figure 26 is Figure 2 5 's Morton's for neuroma countermeasure insole 9 00 when viewed from the heel direction (for example, FB 4) ) and cross-sectional views of each part. Figure 25(a) is a rear view of the Morton countermeasure insole 900, and Figure 25(b) is a side view when viewed from the inner direction of Figure 25(a). Further, Figure 25(c) is a cross-sectional view taken along the D7-D7 direction of Figure 25(a). This D7-D7 is a straight line connecting the tip 900A and the rear end 900B of the Morton countermeasure insole 900, and is also referred to as the center line Lad of the insole for Morton. For the same reference numerals as those in the above figures, the description is omitted.

[0148] As shown in Figures 25(a), 25(b), and 25(c), the upper layer member 920 (urethane) for Morton is pressure-bonded onto the of the lower member 910 for Morton Morton countermeasure insole 900 (urethane). Also, as shown in Figure 25(a), a bending induction groove Ra similar to the above is formed on the back surface. Further, the direction of view from the heel direction is described as FB4. Figure 25(b) describes the height dd10 (14 mm to 17 mm: preferably about 15 mm) at which the inner corner is maximum when viewed from the inner direction. Also, the height near the heel when viewed from the inner side is described as dd8 (10 mm to 13 mm: preferably 12.0 mm). And the height is decreased from a position Eb near (behind PIa) at LEb (7 mm to 12 mm: preferably 10 mm) from the rear end 900B to reach the rear end 900B. From PIa to the rear end 900B, it is about 36 mm (LPE).

[0149] Also, as shown in Figure 25(c), the height of the forefoot corresponding region is dd1 (for example, 1.5 mm), and the height near the apex of the convex portion CA for the transverse arch is dd3 (for example, 9.3 mm). Also, the height of the heel corresponding region is dd6 (for example, 2.5 mm), and the height of the rear end 900B is dd9 (for example, 3.4 mm). Note that, as shown in Figure 25(c), since it is viewed from the D7-D7 direction of Figure 25(a), the upper surface AU of the outer corner is visible. The height of this outer corner is dd5 (for example, 11.5 mm).

[0150] Next, with reference to FIG. 26, the Morton countermeasure insole 900 of FIG. 25 as viewed from the heel direction and cross-sectional views of each part will be described. However, descriptions of the same reference numerals as those in the above figures will be omitted. FIG. 26(a) is a front view of FIG. 25( a ) as viewed from the FB4 direction (heel direction). As shown in FIG. 26(a), since the height of the rear end 900B is extremely low (dd9: for example, 3.0 mm), the convex portion CA for the transverse arch is visible. FIG. 26(b) is a cross-sectional view of FIG. 25( a ) as viewed from the front in the D1-D1 cross-section. As shown in FIG. 26(b), since the vicinity of the D1-D1 cross-section of FIG. 25( a ) is the part of the forefoot corresponding region, the thickness is thin, and its height dd 2 is about 1.5 mm.

[0151] FIG. 26(c) is a cross-sectional view of FIG. 25( a ) as viewed from the front in the D2-D2 cross-section. As shown in FIG. 26( c b), since the vicinity of the D2-D2 cross-section of FIG. 25( a ) is the part of the midfoot corresponding region, the lower layer member 910 for Morton exists. Also, since it is near the apex of the convex portion CA for the transverse arch, it has a thickness, and its height is also about dd4 (8.5 mm). Furthermore, since the leading edge IF d of the lower layer member 910 for Morton is configured to surround the bone base of the fifth metatarsal bone 55, the D2-D2 cross-section includes the cross-section of the region (the fifth metatarsal bone depression region M) where this fifth metatarsal bone 55 is placed. Therefore, as shown in FIG. 26(c), the portion of the fifth metatarsal bone depression region M is thin in thickness, and its height is about 3.0 mm (2.8 mm to 3.5 mm: preferably 3.0 mm).

[0152] Also, since it is near the apex of the convex portion CB for the medial longitudinal arch, the inner edge of the convex portion CB for the medial longitudinal arch is high. FIG. 26(d) is a view of FIG. 25( aIt is a cross-sectional view when looking from the front at the D3-D3 cross-section of (). Since this part is close to the rear foot corresponding area, it is slightly thinner than the D2-D2 cross-section, and its height is dd6 (6.0 mm). Note that since it is slightly thinner than the D2-D2 cross-section, the convex part CA for the transverse arch can also be seen. Figure 26(e) is a It is a cross-sectional view when looking from the front at the D4-D4 cross-section of (). Since this part is between the PIa of the rear foot corresponding area and the rear end 900B, the thickness is also thin, and its height is dd12 (3.0 mm). Therefore, the convex part CA for the transverse arch and the convex part CB for the inner longitudinal arch can be seen clearly.

[0153] (Details of the insole 1000 for knee pain countermeasure) Figure 27 is a detailed explanatory view of the insole 1000 for knee pain countermeasure. Figure 28 is a cross-sectional view of each part when the insole 1000 for knee pain countermeasure in Figure 27 is viewed from the heel direction (for example, FB5). Figure 27(a) is a rear view of the insole 1000 for knee pain countermeasure, and Figure 27(b) is a side view when viewed from the inner direction of Figure 27(a). Also, Figure 27(c) is a cross-sectional view from the E7-E7 direction of Figure 27(a). This E7-E7 is a straight line connecting the tip 1000A and the rear end 1000B of the insole 1000 for knee pain countermeasure, and is also referred to as the center line Lae of the insole for knee pain. Note that the description of the same reference numerals as in the above figures is omitted.

[0154] As shown in Figures 27(a), 27(b), and 27(c), the insole 1000 (urethane) for knee pain countermeasure of the lower member 1010 for knee pain has the upper layer member 1020 (urethane) for knee pain pressure-bonded on it. Also, as shown in Figure 27(a), a bending induction groove Ra similar to the above is formed on the back surface. Furthermore, the direction of viewing from the heel direction is described as FB5. Figure 27(b) describes that the height at which the inner corner is maximized when viewed in the inner direction is de10 (14 mm to 17 mm; preferably about 15 mm). Also, the height near the heel when viewed from the inside is described as de8 (10 mm to 13 mm; preferably 12.0 mm). And the height is decreased from the vicinity of point Eb (behind PIa) in the range of LEb (7 mm to 12 mm; preferably 10 mm) from the rear end 1000B to reach the rear end 1000B. From PIa to the rear end 1000B, it is about 36 mm (LPE).

[0155] Also, as shown in Figure 27(c), the height of the forefoot corresponding region is de1 (for example, 1.5 mm), and the height near the apex of the convex portion CA for the transverse arch is de3 (for example, 9.3 mm). Also, the height of the heel corresponding region is de6 (for example, 2.5 mm), and the height of the rear end 1000B is de9 (for example, 3.4 mm). Note that, as shown in Figure 27(c), it is viewed from the E7 - E7 direction of Figure 27(a), so the upper surface AU of the outer corner is visible. The height of this outer corner is de5 (for example, 11.5 mm). Next, with reference to Figure 28, the insole 1000 for knee pain countermeasure in Figure 27 will be described when viewed from the heel direction and the cross-sectional views of each part. However, the description of the same reference numerals as in the above figures will be omitted.

[0156] Figure 28(a) is a front view when viewed from the FB5 direction (heel direction) of Figure 27( a ). As shown in Figure 27(c), since the height of the rear end 1000B is is very low (de9: for example, 3.0 mm), the convex portion CA for the transverse arch is visible. Figure 28(b) is a cross-sectional view when viewed from the front in the E1 - E1 cross-section of Figure 27( a ). As shown in Figure 28(b), since the vicinity of the E1 - E1 cross-section is part of the forefoot corresponding region, the thickness is thin, and its height de 2 is about 1.5 mm. Figure 28(c) is a cross-sectional view when viewed from the front in the E2 - E2 cross-section of Figure 27( a ). The vicinity of the E2 - E2 cross-section is part of the midfoot corresponding region, and knee painlower use The layer member 1010 is present. Also, since it is near the vertex of the convex portion CA for the transverse arch, it has a thickness, and its height is also about de4 (10.0 mm).

[0157] Furthermore, since the leading edge IFe of the lower layer member 1010 for knee pain is configured to surround the bone base of the fifth metatarsal bone 55, the E2 - E2 cross - section includes the cross - section of the fifth metatarsal depression region M (not shown) on which the fifth metatarsal bone 55 is placed. Therefore, as shown in Fig. 28(c), the portion of the fifth metatarsal depression region M is thin in thickness, and its height is about 3.0 mm (2.8 mm to 3.5 mm: preferably 3.0 mm). Also, since it is near the vertex of the convex portion CB for the medial longitudinal arch, the inner edge of the convex portion CB for the medial longitudinal arch is high. Fig. 28(d) is a cross - sectional view when viewed from the front in the E3 - E3 cross - section of Fig. 27( a ). This portion is near the rear - foot corresponding region, so it is slightly thinner than the E2 - E2 cross - section, and its height is de6 (6.0 mm). Since it is slightly thinner than the E2 - E2 cross - section, the convex portion CA for the transverse arch can also be seen.

[0158] Also, in order to correct the rear - foot by eversion, a long inclined surface is formed in the region from the location of the outer edge facing the vicinity of the center of the fifth metatarsal bone 55 through the vicinity of the center of the calcaneus 75 to the rear end. For this reason, the outer edge of the E3 - E3 cross - section has a height of, for example, about 13.0 mm. Fig. 28(e) is a cross - sectional view when viewed from the front in the E4 - E4 cross - section of Fig. 27( a ). The height of this portion is de12 (7.0 mm).

[0159] (Details of the lumbar pain countermeasure insole 1100) Fig. 29 is a detailed explanatory view of the lumbar pain countermeasure insole 1100. Fig. 30 is a cross - sectional view of each part when the lumbar pain countermeasure insole 1100 of Fig. 29 is viewed from the heel direction (e.g., FB6). Figure 29(a) is a rear view of the lumbar pain countermeasure insole 1100, and Figure 29(b) is a side view when viewed from the inner direction of Figure 29(a). Further, Figure 29(c) is a cross-sectional view taken in the F7-F7 direction of Figure 29(a). This F7-F7 is a straight line connecting the tip 1100A and the rear end 1100B of the lumbar pain countermeasure insole, and is also referred to as the center line Laf of the lumbar pain countermeasure insole inlay. For the same reference numerals as those in the above figures, the description is omitted.

[0160] As shown in FIGS. 29(a), 29(b), and 29(c), on the lumbar pain countermeasure insole 1100 (urethane) of the lower member 1110 for low back pain there is a lumbar pain use upper layer member 1120 (urethane) is pressure-bonded. Also, as shown in FIG. 29(a), a bending induction groove Ra similar to the above is formed on the back surface. Further, the direction of view from the heel direction is described as FB6. In FIG. 29(b), the height at which the inner corner is maximum when viewed from the inner direction is described as df10 (14 mm to 17 mm: preferably about 15 mm). Also, the height near the heel when viewed from the inner side is described as df8 (10 mm to 13 mm: preferably 12.0 mm). And from the vicinity of the position Eb (behind PIa) of LEb (7 mm to 12 mm: preferably 10 mm) at the rear end 1100B is the height is reduced to reach the rear end 1100B. From PIa to the rear end 1100B, it is about 36 mm (LPE).

[0161] Also, as shown in FIG. 29(c), the height of the forefoot corresponding region is df1 (for example, 1.5 mm), and the height near the apex of the transverse arch convex portion CA is df3 (for example, 6.0 mm). Also, the height of the heel corresponding region is df6 (for example, 5.0 mm), and the height of the rear end 1100B is df9 by is there. Note that, as shown in FIG. 29(c), since it is viewed in the F7-F7 direction of FIG. 29(a), the upper surface AU of the outer corner is visible. The height of this outer corner is df5 (for example, 11.5 mm).

[0162] Next, with reference to FIG. 29, the plantar support 1100 for low back pain countermeasures shown in FIG. 28 will be described as viewed from the heel direction and sectional views of each part. However, descriptions of the same reference numerals as those in the above figures will be omitted. FIG. 30(a) is a front view when viewed from the FB6 direction (heel direction) of FIG. 29( a ). As shown in FIG. 29(c), since the height of the rear end 1100B is very low, the convex portion CA for the transverse arch is visible (df 9 ).

[0163] FIG. 30(b) is a sectional view when viewed from the front in the F1-F1 section of FIG. 29( a ). Since the vicinity of the F1-F1 section corresponds to the forefoot region, the thickness is thin, and its height df2 is about 1.5 mm. FIG. 30(c) is a sectional view when viewed from the front in the F2-F2 section of FIG. 29( a ). The vicinity of the F2-F2 section corresponds to the midfoot region, and the lower layer member 1110 for low back pain exists. Also, although it is near the apex of the convex portion CA for the transverse arch, since the apex is low, its height is also about df4 (6.0 mm). Furthermore, since the leading edge IFf of the lower layer member 1110 for low back pain surrounds the bone base of the fifth metatarsal bone 55, the F2-F2 section includes the section of the fifth metatarsal bone depression region M on which the fifth metatarsal bone 55 is placed.

[0164] Therefore, as shown in FIG. 30(c), the portion of the fifth metatarsal bone depression region M is thin in thickness, and its height is about 3.0 mm (2.8 mm to 3.5 mm: preferably 3.0 mm). Also, since it is near the apex of the convex portion CB for the medial longitudinal arch, the inner edge of the convex portion CB for the medial longitudinal arch is high. FIG. 30(d) is a sectional view when viewed from the front in the F3-F3 section of FIG. 29( a ). Since this portion is close to the rear foot corresponding region, it is slightly thinner than the F2-F2 section, and its height is df6( 5.0 mm ). FIG. 30(e) is a sectional view when viewed from the front in the F4-F4 section of FIG. 29( a ). The height of this part is df12 (4.5 mm). That is, by lowering the rear foot part, the pelvis is tilted backward to reduce pain.

[0165] (Details of the insole 1200 for O-shaped leg countermeasures) Figure 31 is a detailed explanatory drawing of the insole 1200 for O-shaped leg countermeasures. Figure 32 is a cross-sectional view of each part when the insole 1200 for O-shaped leg countermeasures in Figure 31 is viewed from the heel direction (for example, FB7). Figure 31(a) is a rear view of the insole 1200 for O-shaped leg countermeasures, and Figure 31(b) is a side view when viewed from the inner direction of Figure 31(a). Also, Figure 31(c) is a cross-sectional view from the G7-G7 direction of Figure 30(a). This G7-G7 is a straight line connecting the tip 1200A and the rear end 1200B of the insole 1200 for O-shaped leg countermeasures, and is also referred to as the center line Lag of the insole for O-shaped legs. For the same reference numerals as in the above figures, the description is omitted.

[0166] As shown in Figures 31(a), 31(b), and 31(c), on the the lower member 1210 for knock knee of the insole 1200 (urethane) for O-shaped leg countermeasures leg use the upper layer member 1220 (urethane) is pressure-bonded. Also, as shown in Figure 31(a), a bending induction groove Ra similar to the above is formed on the back surface. Further, the direction viewed from the heel direction is described as FB7. Figure 31(b) describes that the height at which the inner corner is maximum when viewed from the inner direction is dg10 (14 mm to 17 mm: preferably about 15 mm). Also, the height near the heel when viewed from the inner side is described as dg8 (10 mm to 13 mm: preferably 12.0 mm). And the height is reduced from the vicinity of point Eb (behind PIa) at a position LEb (7 mm to 12 mm: preferably 10 mm) from the rear end 1200B to reach the rear end 1200B. From PIa to the rear end 1200B, it is about 36 mm (LPE).

[0167] Further, as shown in FIG. 31(c), the height of the forefoot corresponding region is dg1 (e.g., 1.5 mm), and the height near the apex of the convex portion CA for the transverse arch is dg3 (e.g., 5.0 mm). Also, the height of the heel corresponding region is dg6 (e.g., 5.8 mm), and the height of the rear end 1200B is dg by 9 There is. Note that, as shown in FIG. 31(c), since it is viewed from the E7 - E7 direction of FIG. 31(a), the upper surface AU of the outer corner is visible. The height of this outer corner is dg5 (e.g., 15.5 mm). The reason why the height of the outer corner is as high as dg5 (e.g., 15.5 mm) is that in order to correct the eversion of the midfoot to the rear foot, an inclined region (inclined region for O - shaped legs: not shown) is formed from a location near the center of the cuboid bone 71 on the inner edge of the back surface to the rear end of the heel. By this, an external force is applied to cause the entire lower leg to fall inward, and the knee joint is induced in the everted direction. Next, with reference to FIG. 32, the case of viewing the insole 1200 for O - shaped leg countermeasure of FIG. 31 from the heel direction and cross - sectional views of each part will be described. However, the description of the same reference numerals as those in the above figures will be omitted.

[0168] FIG. 32(a) is a front view when viewed from the FB7 direction (heel direction) of FIG. 31( a ). As shown in FIG. 29(c), since the height of the rear end 1100B is very low (df 9)、 As shown in FIG. 32(a), the convex portion CA for the transverse arch is visible. Also, for the O - shaped leg use The line is Since it passes obliquely from a location near the center of the cuboid bone 71 to near the center of the calcaneus bone (slightly inside) and reaches the rear end, the outer edge side is higher.

[0169] FIG. 32(b) is a cross - sectional view when viewed from the front in the G1 - G1 cross - section of FIG. 31( a ). Since the vicinity of the G1 - G1 cross - section is the portion of the forefoot corresponding region, the thickness is thin, and its height dg2 is about 1.5 mm. FIG. 32(c) is FIG. 31( a) is a cross-sectional view when looking from the front at the G2-G2 cross-section. The vicinity of the G2-G2 cross-section is part of the midfoot corresponding region, and the lower layer member 1210 for the O leg is present. Also, although it is near the apex of the convex portion CA for the transverse arch, the apex is slightly lower than the lumbar pain, and its height is also about dg4 (5.7 mm). Also, since it is also near the apex of the convex portion CB for the medial longitudinal arch, the inner edge of the convex portion CB for the medial longitudinal arch is high.

[0170] Figure 32(d) is a cross-sectional view when looking from the front at the G3-G3 cross-section of Figure 31( a ). Since this part is near the rearfoot corresponding region, it is slightly thinner than the G2-G2 cross-section, and its height is dg6 (5.0 mm). Figure 32(e) is a cross-sectional view when looking from the front at the G4-G4 cross-section of Figure 31( a ). The height of this part is dg12 (6.0 mm). That is, since the inclined surface Cg is formed on the outer edge side, a thickness with a height (for example, dg5) is formed on the outer edge side across the G3-G3 cross-section to the G4-G4 cross-section. use

[0171] (Details of the insole 1300 for preventing plantar fasciitis) Figure 33 is a detailed explanatory view of the insole 1300 for preventing plantar fasciitis. Figure 34 is a cross-sectional view of each part when looking at the insole 1300 for preventing plantar fasciitis of Figure 33 from the heel direction (for example, FB8). Figure 33(a) is a rear view of the insole 1300 for preventing plantar fasciitis, and Figure 33(b) is a side view when looking from the inner side direction of Figure 33(a). Also, Figure 33(c) is a cross-sectional view from the H7-H7 direction of Figure 33(a). This H7-H7 is a straight line connecting the front end 1300A and the rear end 1300B of the insole 1300 for preventing plantar fasciitis, and is also called the insole center line Lah of the plantar fascia. Note that the description of the same reference numerals as in the above figures is omitted. inflammation use

[0172] As shown in FIGS. 33(a), 33(b), and 33(c), an upper member 1320 (urethane) for plantar fasciitis is pressure-bonded onto a lower member 1310 (urethane) for plantar fasciitis. Also, as shown in FIG. 33(a), a bending induction groove Ra similar to the above is formed on the back surface. Further, the direction of view from the heel direction is described as FB8. FIG. 33(b) describes that the height at which the inner corner is maximum when viewed in the inner direction is dh10 (14 mm to 17 mm: preferably about 15 mm). Also, the height near the heel when viewed from the inner side is described as dh8 (10 mm to 13 mm: preferably 12.0 mm). And the height is decreased from near the position Eb (behind PIa) of LEb (7 mm to 12 mm: preferably 10 mm) from the rear end 1300B to reach the rear end 1300B. From PIa to the rear end 1300B, it is about 36 mm (LPE).

[0173] Also, as shown in FIG. 33(c), the height of the forefoot corresponding region is dh1 (for example, 1.5 mm), and the height near the apex of the convex portion CA for the transverse arch is dh3 (for example, 6.37 mm). Also, the height of the heel corresponding region is dh6 (for example, 2.44 mm), and the height of the rear end 1300B is dh9 (for example, 5.5 mm). Note that, as shown in FIG. 33(c), since it is viewed from the H7 - H7 direction of FIG. 33(a), the upper surface AU of the outer corner is visible. The height of this outer corner is dh5 (for example, 14.5 mm).

[0174] Next, with reference to FIG. 34, the case of viewing the insole 1300 for preventing plantar fasciitis of FIG. 33 from the heel direction and cross-sectional views of each part will be described. However, the description of the same reference numerals as in the above figures will be omitted. FIG. 34(a) is a front view when viewed from the FB8 direction (heel direction) of FIG. 33( a ). As shown in FIG. 33(c), since the height of the rear end 1 3 00B is very low (dh9: for example, 5.5 mm), the convex portion CA for the transverse arch is visible as shown in FIG. 34(a).

[0175] Figure 34(b) is a cross-sectional view when looking at the front from the H1-H1 cross-section of Fig. 33( a ). Since the vicinity of the H1-H1 cross-section is part of the corresponding area of the front foot part, it is thin, and its height dh2 is about 2.11 mm. Figure 34(c) is a cross-sectional view when looking at the front from the H2-H2 cross-section of Fig. 33( a ). The vicinity of the H2-H2 cross-section is part of the corresponding area of the middle foot part, and the lower layer member 1310 for plantar fasciitis exists. Also, it is near the apex of the convex part CA for the transverse arch, and the height of the apex is about dh4 (6.25 mm).

[0176] Also, since it is also near the apex of the convex part CB for the medial longitudinal arch, the inner edge is high. Figure 34(d) is a cross-sectional view when looking at the front in the H3-H3 cross-section of Fig. 33( a ). This part of Figure 18 has Ta, so it is slightly thinner than the H2-H2 cross-section, and its height is d h 6 (4.49 mm). Figure 34(e) is a cross-sectional view when looking at the front from the H4-H4 cross-section of Fig. 33( a ). The height of this part is dh12 (4.54 mm).

[0177] <Embodiment 4> Although the depression Ta for coping with the plantar fascia edge of the above-described insole 1300 for coping with plantar fasciitis has been described as an ellipse, for example, it may have a shape like a bronze bell as in Japanese Patent No. 6609222. An example in which a bending induction groove Ra is provided on the back surface and the rear end is made low in the same manner as in the above-described embodiment with respect to this Japanese Patent No. 6609222 will be described with reference to Fig. 35. Fig. 35 is an explanatory view of an insole 1400 for coping with plantar fasciitis according to Embodiment 4. Note that the description of those having the same reference numerals as the above-described figures is omitted. Fig. 35(a) shows a perspective view of the insole 1400 for coping with plantar fasciitis, and Fig. 35(b) shows a cross-section along a straight line (not shown) connecting the front end 1400A and the rear end 1400B of the insole 1400 for coping with plantar fasciitis. However, Fig. 35(b) is a view when looking from the inner side.

[0178] The insole 1400 for preventing plantar fasciitis shown in Fig. 35(a) is formed by thermocompression molding of a lower-layer member 1410 for plantar fasciitis, a middle-layer member 1420 for plantar fasciitis, and a surface-layer member 1430. The heights of the convex portion CA for the transverse arch, the convex portion CB for the medial longitudinal arch, and the convex portion CD for the lateral longitudinal arch are made higher than those of the above-mentioned convex portions for countermeasures against splayed feet, hallux valgus, and posture maintenance. deviation They are used for preventing flat feet. Further, a recessed portion TD for protecting the plantar fascia is formed.

[0179] The material of this insole is such that the lower-layer member 1410 for plantar fasciitis and the middle-layer member 1420 for plantar fasciitis are soft elastic members. Specifically, they are urethane resin, elastomer, cork rubber, EVA resin material, etc. In this embodiment, urethane resin (hereinafter simply referred to as urethane) will be described. Also, the surface-layer member 1430 is a non-woven fabric, cloth, leather, artificial covering, or the like. In this embodiment, it will be described as cloth. Note that the aforementioned lower-layer member 1410 for plantar fasciitis is made of the same material as the middle-layer member 1420 for plantar fasciitis, but has a higher compression rate (feels harder) than the middle-layer member 1420 for plantar fasciitis. For this reason, an appropriate repulsive force is applied from the lower-layer member 1410.

[0180] Also, as shown in Fig. 35(a), a recessed portion TD for protecting the plantar fascia in the shape of a bronze bell is formed on the heel side. Further, these are formed so as to be connected by smooth curved surfaces. The elliptical hole Tda of this recessed portion TD for protecting the plantar fascia is formed in a region corresponding to the heel bone prominence of the foot. Also, as shown in Fig. 35(b), the height of the convex portion CA for the transverse arch gradually decreases toward the rear end side. Further, the rear end 1400B has a reduced height, and the height thereof is the height at the tip of the rear foot portion behind the convex portion CA for the transverse arch. Details of the aforementioned recessed portion TD for protecting the plantar fascia will be described with reference to Fig. 36. Fig. 36 is an enlarged perspective view of the recessed portion TD for protecting the plantar fascia. However, the elliptical hole Tda is shown by a dotted line, and the region corresponding to the fascia origin portion areaIt is indicated by a dotted line. Also, the plantar fascia K extending radially from the fascia origin part is described.

[0181] As shown in FIG. 36, the plantar fascia protection concave part TD has a width of about 33.0 mm in the vicinity corresponding to the fascia origin part, and 36.0 mm on the side of the convex part for the transverse arch. That is, the width gradually widens toward the convex part for the transverse arch. In this embodiment, this is referred to as the shape of a bronze bell. Also, the height gradually increases toward the side of the convex part for the transverse arch. area attachment For this reason, when the foot is placed on this insole, the periphery of the calcaneus rests on the top (convex) of the rear foot corresponding region 230 excluding the plantar fascia protection concave part TD, so the fascia origin part of the plantar fascia K does not become painful. That is, the pain caused by plantar fasciitis can be relieved.

[0182]

[0183] <Embodiment 5> The above-mentioned flexion induction groove Ra may be provided on the insole of Japanese Patent No. 6994681. Also, the rear end may be lowered, or it may be left as it is without being lowered. In this embodiment, the right insole of Japanese Patent No. 6994681 provided with this flexion induction groove Ra will be described as a walking insole (the rear end may be lowered). FIG. 37 is a rear view of the walking insole 1500 of Embodiment 5. On the surface, in the same manner as above, a convex part for the medial longitudinal arch, a convex part for the transverse arch, and a convex part for the lateral longitudinal arch are formed (not shown).

[0184] Furthermore, an outer inclined region is formed on the surface side. This outer inclined region is formed as a long inclined surface in the longitudinal direction where the height gradually increases toward the outer edge between a substantially straight line passing through the vicinity of the center of the fifth midfoot bone to the vicinity of the center of the base of the fifth midfoot bone and passing through the vicinity of the center of the rear foot corresponding region and the outer edge. Note that the front foot corresponding region corresponding to the front foot (not shown) is warped toward the toe side and both edges (see FIG. 40).

[0185] As shown in FIG. 37, on the back side of the lower member constituting the walking insole 1500, a groove having a substantially reverse S shape with a width of about 1.8 mm that reaches the tip and substantially surrounds the ball-of-toe corresponding region (not shown) (hereinafter referred to as the substantially reverse S-shaped groove SGi) is formed. Further, it is formed substantially radially outward from the range corresponding to the ball-of-toe region of the substantially reverse S-shaped groove SGi. These grooves are spaced at intervals of about 10 mm at the outer edge.

[0186] Furthermore, as shown in FIG. 37, the walking reinforcing member 1570 is pressure-bonded to the back surface of the walking lower member 1510. In this walking reinforcing member 1570, a region corresponding to the vicinity of the center of the calcaneus is punched out in an oval shape (hereinafter referred to as the walking reinforcing member heel portion hole 1580). In addition, the front edge on the outer side of the foot near the midfoot corresponding region 220 that is the front edge of the walking reinforcing member 1570 (hereinafter referred to as the walking reinforcing member outer foot edge WTa) is shaped so that the fifth midfoot bone for walking (not shown) does not hit it. Further, a flexion induction groove Ra is formed on the back surface.

[0187] The walking insole 1500 is a multilayer structure including a walking lower member 1510 made of urethane foam, a walking upper member 1520 made of urethane foam, a walking skin member 1530, and a walking reinforcing member 1570 as the lowermost layer (see FIGS. 39 and 40). In addition to urethane foam, a foam of a thermoplastic synthetic resin such as ethylene vinyl acetate copolymer (EVA) or a foam of a rubber material such as butadiene rubber may be used. Also, in the walking insole 1500 of the present embodiment, a core material is provided between the lower member and the upper member. Note that this core material may not be provided, but in the present embodiment, it will be described assuming that the core material is incorporated.

[0188] FIG. 38 is a plan view of the walking insole 1500 of the present embodiment as viewed from the back side. However, a part of the foot F is shown by a solid line. Also, the convex portions formed on the front surface side are shown by solid lines, and the core between the lower layer member and the upper layer member is also shown by a solid line. As shown in FIG. 38, the walking insole 1500 is provided with a walking core material JS between a walking lower layer member 1510 (not shown) and a walking upper layer member 1520 (not shown). As shown in FIG. 38, the walking core material JS is a substantially "U"-shaped band with a wide area related to the ball of the big toe. That is, when walking, the load on the foot passes through the walking core material JS and escapes to the thumb side. Also, since the flexion induction groove Ra is formed immediately after the ball of the big toe, when the foot lands, the knee vector can be directed inward, so that one can walk straight and smoothly. Also, the convex portion for the outer longitudinal arch of walking (hereinafter referred to as the outer inclined region WSi of walking) reaches near the center of the heel portion hole 1580 of the reinforcing member for walking provided at the rear foot portion, so it pushes up the outer side of the sole of the foot.

[0189] Next, the following will be described using a cross-sectional view. FIG. 39(b) is a cross-section taken along line Bj-Bj of the walking insole 1500 of FIG. 38, and FIG. 39(a) is a cross-sectional view taken along line Dj-Dj of FIG. 38. Also, FIG. 40 is a cross-sectional view taken along line J-J of FIG. 38. As shown in FIGS. 39(b) and 39(a), the outer inclined region WSi of walking is a long slope in the longitudinal direction whose inclination is gradually increased toward the outer edge. <Embodiment 6> In the present embodiment, the insole on the left side of Japanese Patent No. 7113481 provided with this flexion induction groove Ra will be described as the running insole 1600 (the rear end may be lowered). FIG. 41 is a rear view of the running insole 1600 of Embodiment 6. On the surface, convex portions for the inner longitudinal arch, convex portions for the transverse arch, and convex portions for the outer longitudinal arch are formed in the same manner as above, but are not shown. Furthermore, a bending guide groove Ra is formed on the back side of the lower member constituting the running insole 1600, immediately after the ball-of-the-foot corresponding region (not shown).

[0190] Also, as shown in FIG. 41, on the back side, a substantially reverse S-shaped groove SGi that reaches the tip is formed so as to substantially surround the ball-of-the-foot corresponding region BC in the running lower member 1610. Furthermore, the running reinforcing member 1670 is pressure-bonded to the back surface of the running lower member 1610. In this running lower member 1610, a region corresponding to the vicinity of the center of the calcaneus (not shown) is punched out in an oval shape (hereinafter referred to as the running reinforcing member heel hole portion 1680).

[0191] Also, the outer edge Wb of the foot of the running reinforcing member 1670, which is the front edge of the running reinforcing member, T is shaped so that the fifth metatarsal bone for running (not shown) does not hit it. Furthermore, as shown in FIG. 42 to be described later, the running core material reaches near the front of the back of the ball-of-the-foot corresponding region. Also, the tip edge on the toe side of the running reinforcing member 1670 is shaped so as not to hit the fifth metatarsal bone. Furthermore, a bending guide groove Ra is formed on the back surface.

[0192] Also, the running insole 1600 is a multilayer structure including a urethane foam running lower member 1610, a urethane foam running upper member 1620 (not shown), a running skin member 1630 (not shown), and a running reinforcing member 1670 as the lowermost layer (FIG. 4 3 (b), FIG. 4 3 (c) (see). Also, in the running insole 1600 of the present embodiment, a core material is provided between the lower member and the upper member. Note that this core material may not be provided, but in the present embodiment, it will be described assuming that the core material is incorporated. Figure 42 is a plan view of the running insole 1600 of the present embodiment as viewed from the back side. However, part of the foot F is shown by a solid line. Also, the convex portions formed on the surface side are shown by solid lines, and the core between the lower layer member and the upper layer member is also described by a solid line. As shown in FIG. 42, the running insole 1600 is provided with a running core material KS between a running lower layer member 1610 (not shown) and a running upper layer member 1620 (not shown). That is, during running, the load on the foot passes through the running core material KS and escapes to the thumb side. In addition, since the bending induction groove Ra is formed immediately after the ball of the big toe, when the foot lands, the knee vector can be directed inward, so that it can run straight and smoothly.

[0193] Figure 4 3 is an explanatory diagram of the running insole 1600. Figure 4 3 (a) is a plan view of the running insole as viewed from above. Figure 4 3 As shown in (a), a recess RH is formed on the surface, and the bending induction groove Ra is formed immediately after this.

[0194] Figure 4 3 (b) is Figure 4 3 a cross-sectional view taken along the line Rj - Rj of Fig. 4(a), Figure 4 3 1(c) is Figure 4 3 a cross-sectional view taken along the line Rk - Rk of Fig. 4(a). Note that the running skin member 1630 is not shown in Fig. 43(b) and Fig. 4 3 (c). Figure 4 3 As shown in (c), in the Rk - Rk cross-section at the heel portion, it shows that there is no outer inclination region (convex portion for the outer longitudinal arch) like walking. Further, for the running insole, Figure 4 3 As shown in (c), a recess HR for receiving the ball of the big toe is provided on the surface side. Immediately after the back surface of this recess RH, the bending induction groove Ra is formed. Also, a plate-shaped soft cushioning material (not shown) may be pressure-bonded to the recess RH.

[0195] <Embodiment 7 > Figure 4 4 is an explanatory view of the running insole 1 7 00 when viewed from the front side. Figure 4 6 (a) is a perspective view of the running insole 1600. Figure 4 4 (b) is a perspective view showing a part of Fig. 43(a) in cross section. 4 (b) is a perspective view showing a part of Fig. 43(a) in cross section.

[0196] The recess RH has a bottom RHa (ellipse or circle) and a side wall RHb connected to the bottom RHa. In the illustrated example, the bottom RHa of the recess RH is a flat surface having an elliptical or circular shape. When the major axis of the ellipse is concerned, the recess RH preferably extends from the inner edge toward the outer edge. The side wall RHb of the recess RH extends in a flared shape like a mortar from the bottom RHa. That is, when the ball of the big toe of the foot is received in the recess RH, the ball of the big toe is placed on the bottom RHa of the recess RH, and is partially surrounded by the side wall RHb and contacts the side wall RHb. Therefore, the ball of the big toe of the foot does not shift during walking, running, or kicking. Also, the flexion induction groove Ra can direct the direction of the knee of the foot inward. That is, on the surface side, a recess for mainly assisting running is formed in a region corresponding to the ball of the big toe on the back side of the foot, and further, an insole in which a convex portion for the transverse arch and a convex portion for the inner longitudinal arch are formed, The recess has a mortar shape in which a small circular bottom surface is surrounded by a curved peripheral wall and the upper edge is circular, Furthermore, a raised portion having an inclined surface extending the peripheral wall portion where the rear surface of the ball of the big toe of the recess contacts when the foot is placed is continuously provided immediately behind the recess, The range where the raised portion is formed is between the inner edge and the convex portion for the transverse arch, and in front of the apex of the convex portion for the inner longitudinal arch, and is between the head of the first metatarsal bone and the vicinity of the center of the first metatarsal bone when the foot is placed. Furthermore, the raised portion formed within this range has a shape, when viewed from above, that is formed in a substantially triangular shape with an inclined surface, Furthermore, since the bending induction groove Ra is formed on the back surface, when kicking, the inclined surface can apply a repulsive force to the rear surface of the ball of the big toe of the foot and direct the vector inward. Therefore, it can be kicked straight, so running is smart and does not burden the body. Note that the apex of the inclined surface is at a predetermined height below the apex of the convex portion for the transverse arch. also The core material is composed of a woven fabric or non-woven fabric impregnated with a synthetic resin, etc. The thickness of the core material is 1.0 mm or less, the bending rigidity value in the length direction is about 31 N·cm, and the bending rigidity value in the width direction is 17 N·cm. The bending rigidity value was measured under predetermined measurement conditions (measuring instrument: Olsen type stiffness tester, environmental temperature 20°C, environmental relative humidity: 65%RH, deflection angle: 40°).

[0197] By forming the above-mentioned bending induction groove Ra immediately behind the ball-of-the-big-toe corresponding region BC on the back surface of the lower layer member, the actual kicking direction becomes the direction synthesized from the load direction when landing on the side of the ball of the big toe from the ball of the little toe and the direction of the momentum accompanying forward movement, so it is substantially parallel to the walking line and the knee advancement direction. Therefore, even without twisting the knees and ankles, it becomes substantially parallel to the knee advancement direction at the time of foot landing. For this reason, it is possible to kick without burdening the body such as the knees and ankles, so walking can be done without losing posture. Also, since it does not follow a meandering trajectory as in the conventional case, walking and running are smart.

[0198] Note that it is preferable to use the insole of Japanese Patent No. 6767158. That is, on the ground contact surface side, which is the back side of the insole where the rear-foot corresponding region, which is the region corresponding to the rear part of the foot, is made higher than the front-foot corresponding region corresponding to the front part of the foot, a midsole in which a reinforcing plate is pressure-molded, The reinforcing plate has a front edge that is substantially in the shape of an inverted "H" when viewed from the back side. The vertex of the front edge is at a predetermined position near the area between the head region of the third intermediate metatarsal bone and the head region of the fourth intermediate metatarsal bone on the intermediate plate. Further, the front edge consists of an inner side direction edge that becomes the inner side of the foot and an outer side direction edge that becomes the outer side of the foot starting from the vertex. The vertex at the predetermined position is on a horizontal straight line passing near the center of the ball-of-the-big-toe corresponding region corresponding to the ball of the big toe of the foot and near the center of the ball-of-the-little-toe corresponding region corresponding to the ball of the little toe of the foot on the intermediate plate. The inner side direction edge is in a straight line shape that reaches the inner edge through a region immediately behind the head of the first intermediate metatarsal bone of the foot with an included angle of 7 degrees to 12 degrees with respect to the horizontal straight line at the vertex at the predetermined position. The outer side direction edge is preferably the midsole that reaches the outer edge through the region corresponding to the head of the fourth intermediate metatarsal bone and the region corresponding to the head of the fifth intermediate metatarsal bone from the vertex of the front edge.

[0199] Note that the core material may be composed only of synthetic resin. Further, although it was described as a multi-layer structure in the above embodiment, it may be a single layer. However, it is preferable not to provide the core material in the case of a single layer. In each of the above embodiments, the groove was described as being provided on the back surface of the upper layer member, but it may be provided on the upper surface of the upper layer member. Also, it is preferable to use a sole that has grooves for inner thighs, middle thighs, and outer thighs on the back surface of the outsole.

[0200] Also, the insole of this embodiment is preferably made of urethane, and the epidermis is preferably made of polyester, cotton, wool, etc. Also, in addition to urethane foam, it may be a foam of a thermoplastic synthetic resin such as ethylene vinyl acetate copolymer (EVA) or a foam of a rubber material such as butadiene rubber. Note that the reinforcing shell is made of a plastic or a reinforcing fiber with a thickness of 1.0 to 3.0 mm and a flexural modulus of 150 to 3,000 MPa.

Explanation of symbols

[0201] 200 Insole for prenatal use 210 Region corresponding to the front foot 220 Mid-foot corresponding area 230 Rear-foot corresponding area BC Big-toe ball corresponding area SB Little-toe ball corresponding area M Depression area of the fifth mid-foot bone Ra Flexion-inducing groove

Claims

1. An insole having a convex portion for adjusting the arch of the foot formed on the surface side that contacts the foot, A linear bending guide groove is formed between a location on the back side of the third midfoot bone head where the third midfoot bone head on the surface side is placed and a location on the back side of the inner edge that faces immediately after the ball of the big toe back region, which is the back of the region where the ball of the big toe is placed. The insole is characterized by this.

2. The rear end of the rear foot corner is made to be at a height approximately the same as the rear part of the convex portion for the transverse arch on the center line of the insole in the convex portion for the transverse arch, The inner edge and the outer edge Descend from a position facing a predetermined location between the heel center and the rear end and reach the rear end. The insole according to claim 1 is characterized by this.

Images