Children's insoles

Abstract

To provide an inner sole for a child which does not apply a burden to the body of a wearer, for example, a knee and an ankle, allows the wearer to acquire a habit to move on feet straightly, and prevents a shoe from easily coming off.SOLUTION: There is provided a baby insole 100 in which an upper layer member is formed with a foot inside longitudinal arch salient part CAb and a lateral arch salient part CAa, an apex has a height of a maximum height of the foot inside longitudinal arch salient part or lower, and has a length of almost 1 mm to 5 mm so as not to correct a lateral arch of a foot skeleton whose height is a maximum height of a foot outside corner or lower, and the apex is connected to the foot inside longitudinal arch salient part and is formed in a gently sloping shape. A height of a rear end 100B of a heel corner is set to be equal to or lower than a height of an apex of the lateral arch salient part, and to be equal to or higher than a thickness of a heel corresponding region. On a rear surface of the upper layer member, there is formed an oblique groove which obliquely passes through an immediately rear side of a caput of a first metatarsal bone from the vicinity between a third metatarsal bone and a third proximal phalanx, and reaches an inside edge. A height adjusting sheet member has "oblique notch" having a substantially corresponding width and length, and thermally crimped.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an insole for children. [Background technology]

[0002] The basic structure of a child's feet is completed by around the age of 10, so it is advisable to shape them properly when they are young.

[0003] In the development of a child's foot skeleton, the number of bones is about half that of an adult from birth until about age 2, and all the bones appear at about age 8-10, but the bones are still immature and incomplete.

[0004] For example, Patent Document 1 divides the growth of children's feet into four stages and provides a structure that supports the growth of children's feet with four different shapes (for ages 0-2, 3-5, 6-7, and 8-10) so that the shoes can be adapted to the development of a child's feet at each stage.

[0005] (For ages 0-2) For 0-2 year olds, the convex part for the medial longitudinal arch is 6mm-12mm on the inner edge near the center, and gradually becomes lower from there toward the end. The convex part for the transverse arch is 1mm-5mm high, so as not to correct the transverse arch of the foot skeleton, and is oval shaped to straighten the transverse arch.

[0006] The heel cup portion has a width of about 6 mm to 10 mm and a depth of about 6 mm to 12 mm.

[0007] (For ages 3-5) For 3-5 year olds, the convex part for the inner longitudinal arch is 10-14mm high on the inner edge near the center and gradually becomes lower toward the end. The convex part for the transverse arch is egg-shaped with a height of 3-7mm to align the transverse arch.

[0008] The heel cup portion is approximately 8mm to 12mm wide and 8mm to 14mm deep. Furthermore, the outer longitudinal arch portion is formed into a semi-elliptical shape of about 10 mm to 14 mm.

[0009] (For ages 6-7) For 6 to 7 year olds only, the convex part for the inner longitudinal arch is 12 to 16 mm high near the center on the inner edge and gradually becomes lower towards the ends.

[0010] The transverse arch convex portion has a height of about 5mm to 9mm to adjust the transverse arch. The heel cup portion has a width of about 10mm to 14mm and a depth of about 10mm to 16mm. Furthermore, the outer longitudinal arch convex portion is formed in a semi-elliptical shape with a height of about 12 mm to 16 mm.

[0011] (For ages 8-10) For ages 8 to 10, the convex part for the medial longitudinal arch is 14 to 18 mm high at the inner edge and gradually becomes lower towards the end. Moreover, the transverse arch convex portion has a height of about 7 mm to 11 mm, which is sufficient to align the transverse arch. The heel cup portion has a width of about 12 mm to 16 mm and a depth of about 12 mm to 18 mm. Furthermore, the outer longitudinal arch convex portion is formed in a semi-elliptical shape with a height of about 14 mm to 18 mm. [Prior art documents] [Patent documents]

[0012] [Patent Document 1] Patent No. 43076 Summary of the Invention [Problem to be solved by the invention]

[0013] When young people step, twisting their knees and ankles outward in their walking line looks bad and puts strain on the feet, so it is desirable for them to step in a straight line in their walking line.

[0014] It is said that the basic skeleton of a child's foot is completed around the age of 10, and at this time it is important to help them develop the habit of walking in a straight line and to shape the skeleton properly.

[0015] On the other hand, the insoles for children aged 0-2 years, 3-5 years, 6-7 years, and 8-10 years in Patent Document 1 have deep heel cups, which means that the rear corners have to be raised more, making the shoes more likely to slip off. For this reason, there has been a demand for safer insoles for children, even during their active childhood.

[0016] To provide an insole for children that can help young children to develop the habit of walking straight along the running line without putting strain on the knees, ankles and other parts of the body, and that can prevent shoes from slipping off easily. [Means for solving the problem]

[0017] The insole for a baby according to the present invention is formed by thermocompression bonding a surface member, an upper layer member, and a height-adjustable sheet member, The upper layer member is A convex portion for the medial longitudinal arch and a convex portion for the transverse arch are formed, This lateral arch protrusion is The apex is a gentle shape connected to the protrusion for the medial longitudinal arch of the foot, the apex being equal to or less than the maximum height of the protrusion for the medial longitudinal arch of the foot and equal to or less than the maximum height of the lateral corner of the foot, so as not to correct the transverse arch of the foot skeleton, Furthermore, the height of the rear end of the heel corner of the upper layer member is The height is equal to or greater than the thickness of the heel portion corresponding area below the apex of the transverse arch convex portion, and The back surface of the upper layer member is A diagonal groove is formed that runs diagonally from the area between the third metatarsal and the third proximal phalanx to the immediate posterior of the head of the first metatarsal and to the medial edge. The height adjustment sheet member is The gist of the invention is that a "diagonal notch" having a width and length roughly corresponding to the diagonal groove is formed at a location on the back surface of the upper layer member that corresponds to the diagonal groove, and is thermocompression bonded to the back surface of the upper layer member.

[0018] The insole for children according to the present invention is a toddler insole formed by thermocompression bonding a cover member, an upper layer member, and a height-adjustable sheet member, The upper layer member is A convex portion for the medial longitudinal arch of the foot, a convex portion for the lateral arch of the foot, and a convex portion for the lateral longitudinal arch of the foot are formed, The transverse arch protrusion is The apex of the protrusion is a gentle slope that is connected to the protrusion for the medial longitudinal arch of the foot and is equal to or lower than the maximum height of the protrusion for the medial longitudinal arch of the foot and is equal to or lower than the maximum height of the lateral corner of the foot. Furthermore, the height of the rear end of the heel corner of the upper layer member is The height of the transverse arch is set to a level equal to or greater than the thickness of the heel-corresponding region below the apex of the transverse arch protrusion, and The back surface of the upper layer member is A diagonal groove is formed that runs from the area between the third metatarsal and the third proximal phalanx, diagonally past the head of the first metatarsal bone and to the medial edge. The height adjustment sheet member is The gist of the invention is that a "diagonal notch" having a width and length roughly corresponding to the diagonal groove is formed at a location on the back surface of the upper layer member that corresponds to the diagonal groove, and is thermocompression bonded to the back surface of the upper layer member.

[0019] The insole for children according to the present invention is a pre-junior insole for children formed by thermocompression bonding a cover member, an upper layer member, and a height-adjustable sheet member, The upper layer member is A convex portion for the medial longitudinal arch of the foot, a convex portion for the lateral arch of the foot, and a convex portion for the lateral longitudinal arch of the foot are formed, The transverse arch protrusion is The apex is connected to the protrusion for the medial longitudinal arch of the foot at a height equal to or lower than the maximum height of the protrusion for the medial longitudinal arch of the foot and equal to or lower than the maximum height of the lateral corner of the foot, Furthermore, the height of the rear end of the heel corner of the upper layer member is The height of the transverse arch is set to a level equal to or greater than the thickness of the heel-corresponding region below the apex of the transverse arch protrusion, and The back surface of the upper layer member is A diagonal groove is formed that runs diagonally from the area between the third metatarsal and the third proximal phalanx to the immediate posterior of the head of the first metatarsal and to the medial edge. The height adjustment sheet member is The gist of the invention is that a "diagonal notch" having a width and length roughly corresponding to the diagonal groove is formed at a location on the back surface of the upper layer member that corresponds to the diagonal groove, and is heat-pressed to the back surface of the upper layer member.

[0020] Furthermore, the insole for children according to the present invention is a junior insole for children formed by thermocompression bonding a cover member, an upper layer member, and a height-adjustable sheet member, The upper layer member is A convex portion for the medial longitudinal arch of the foot, a convex portion for the lateral arch of the foot, and a convex portion for the lateral longitudinal arch of the foot are formed, The transverse arch protrusion is The apex is connected to the protrusion for the medial longitudinal arch of the foot at a height equal to or lower than the maximum height of the protrusion for the medial longitudinal arch of the foot and equal to or lower than the maximum height of the lateral corner of the foot, Furthermore, the height of the rear end of the heel corner of the upper layer member is The transverse arch is adjusted to a height equal to or greater than the thickness of the heel-corresponding region below the apex of the transverse arch protrusion, so as to be close to that of an adult. The back surface of the upper layer member is A diagonal groove is formed that runs diagonally from the area between the third metatarsal and the third proximal phalanx to the immediate posterior of the head of the first metatarsal and to the medial edge. The height adjustment sheet member is The gist of the invention is that a "diagonal notch" having a width and length roughly corresponding to the diagonal groove is formed at a location on the back surface of the upper layer member that corresponds to the diagonal groove, and is thermocompression bonded to the back surface of the upper layer member. Effect of the Invention

[0021] As described above, according to the present invention, young people can develop the habit of walking straight along the running line without putting strain on the knees, ankles and other parts of the body, and shoes can be prevented from slipping off easily. [Brief description of the drawings]

[0022] [Figure 1] FIG. 2 is a top view of the baby insole. [Diagram 2] FIG. 2 is a top view of an insole for toddlers. [Diagram 3] FIG. 2 is a top view of a pre-junior insole. [Figure 4] FIG. 2 is a top view of a junior insole. [Diagram 5] FIG. 1 is an explanatory diagram (1) of the detailed structure of a baby insole. [Figure 6] FIG. 2 is an explanatory diagram (2) of the detailed structure of a baby insole. [Figure 7] FIG. 1 is an explanatory diagram (1) of the detailed structure of an insole for toddlers. [Figure 8] FIG. 2 is an explanatory diagram (2) of the detailed structure of the toddler insole. [Figure 9] FIG. 1 is an explanatory diagram (1) of the detailed structure of a pre-junior insole. [Figure 10] FIG. 2 is an explanatory diagram (2) of the detailed structure of a pre-junior insole. [Figure 11] FIG. 1 is an explanatory diagram (1) of the detailed structure of a junior insole. [Figure 12] FIG. 2 is an explanatory diagram (2) of the detailed structure of a junior insole. [Figure 13] 3 is a detailed configuration diagram of a lower layer member and an upper layer member of the present embodiment. FIG. [Figure 14]1 is an explanatory diagram of an example of use of an insole for children according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] The embodiments shown below are merely examples of devices and methods for embodying the technical ideas (structures and arrangements) of the invention, and the technical ideas of the present invention are not limited to those described below. Various modifications can be made to the technical ideas of the present invention within the scope of the matters described in the claims.

[0024] In particular, it should be noted that the drawings are schematic and may differ from the actual product. Below, insoles for children are described in order for 1-2 year olds (also called baby insoles: 0 year olds may be included), 3-5 year olds (also called toddler insoles), 6-7 year olds (also called pre-junior insoles), and 8-10 year olds (also called junior insoles).

[0025] Fig. 1 is a top view of a baby insole for the left foot (hereinafter referred to as a baby insole for the left foot 100). However, this is a top view of the left foot placed on the insole, and shows that a baby flexion induction groove portion Ra, which will be described later, is engraved on the back surface.

[0026] 2 is a top view of the toddler insole for the left foot (hereinafter referred to as toddler left-foot insole 200). However, this is a top view of the toddler insole with the left foot placed on it, and shows that the toddler flexion guide grooves Rb, which will be described later, are engraved on the back surface.

[0027] 3 is a top view of a pre-junior insole for a left foot (hereinafter referred to as a pre-junior left-foot insole 300). However, this is a view seen from above with the left foot placed on it, and shows that a pre-junior flexion induction groove Rc, which will be described later, is engraved on the back surface. 4 is a top view of a junior insole for the left foot (hereinafter referred to as junior left-foot insole 400). However, this is a view seen from above with the left foot placed on it, and shows that a junior flexion induction groove Rd (shown by a solid line) described later is engraved on the back surface.

[0028] At birth, i.e., between 0 and 2 years of age, not all bones are present as shown in Figure 1. At 3 to 5 years of age, they grow as shown in Figure 2, at 6 to 7 years of age, they grow as shown in Figure 3, and at 8 to 10 years of age, they grow as shown in Figure 4, and the number of bones becomes almost the same as that of an adult.

[0029] However, these bones are immature, and a characteristic of bone growth is that, for example, in the growth of long bones (long, pipe-shaped bones), the shaft appears first, followed by the epiphyseal regions at both ends, with the gap between them becoming epiphyseal cartilage called a growth line. Complete bony union of the epiphyseal cartilage occurs between the ages of 18 and 22 in men and 16 to 20 in women. During the growth process up to this age, the structural strength of the epiphyseal cartilage is weaker than other ossified parts, and damage to the epiphyseal cartilage during the growth period will impair subsequent bone growth.

[0030] When looking at commercially available insoles for children's feet, many of them have a steep arch structure similar to that of adult insoles, but this is a big mistake.

[0031] This is because these insoles are based on the theory of insole therapy, an orthopedic treatment method, which uses a shape similar to that of a footwear insole, and is designed based on the theory that when the convex structure of the arch presses against the sole of the foot, it uses the body's weight via the soft tissue to correct the skeletal structure. However, as shown in Figures 1 and 2, in the feet of children up to about 3 to 5 years old, the bones that are to be corrected have not yet appeared.

[0032] Without any consideration of human development or anatomical studies, simply imitating the shape of an insole, which is a medical device used in insole therapy for adults, miniaturizing it, and manufacturing and selling it for children is extremely dangerous to the healthy development of children's feet.

[0033] The reason why a steep arch structure like that for adults is not necessary is that in the feet of adults, the tissues that support the foot skeleton, such as muscles and ligaments, are fully developed and basically do not require support or correction from an insole on the sole of the foot. However, in order to cope with long periods of standing or walking, or the collapse of the foot skeleton due to relaxation of muscles and ligaments, it is often necessary to maintain the skeletal structure of the foot by applying pressure from the sole of the foot through the convex shape of the arch of the insole.

[0034] In this case, the fat layer on the sole of the foot is thin, creating a flat surface and gaps that need to be filled; however, children's feet have a thick fat layer on the soles that acts to some extent as an arch cushion and acts as a compensation for the muscles and ligaments that hold the foot skeleton in place.

[0035] However, the bones, muscles, ligaments and other tissues that make up a child's feet are immature, and the stability and foot rigidity when standing, walking and running are significantly weaker than those of an adult. Therefore, proper support and retention are necessary. Furthermore, a certain degree of corrective effect must also be considered in order to avoid minor foot problems and pediatric foot diseases.

[0036] On the other hand, when you reach adolescence, it is important to develop the habit of stepping straight in line with the running line.

[0037] In consideration of the above-mentioned human development, stability and anatomical knowledge in running, and the need to develop the habit of walking in a straight line relative to the running line, in order to provide footwear insoles suited to the developmental stages of children's feet, and footwear using the same, the features of the children's insoles shown in Figs. 1 to 4 according to each developmental stage of the feet will be described below.

[0038] (For babies) As shown in FIG. 1, the foot skeleton of a baby is generally made up of a first distal phalange 53, a first proximal phalange 43, a second distal phalange 57, a second middle phalange 55, a second proximal phalange 45, a third distal phalange 61, a third middle phalange 59, a third proximal phalange 47, a fourth distal phalange 65, a fourth middle phalange 63, a fourth proximal phalange 49, a fifth distal phalange 69, and a fifth middle phalange 67. These are the fifth proximal phalanx 51, the first metatarsal 17, the second metatarsal 19, the third metatarsal 21, the fourth metatarsal 23, the fifth metatarsal 25, the talus 3, and the calcaneus 1, but the epiphysis of each bone has not yet appeared, and except for the forefoot 71, the first cuneiform, second cuneiform, third cuneiform, navicular, and cuboid bones that make up the midfoot 73 and hindfoot 75 have not yet appeared.

[0039] Additionally, the thenar eminence, which is the connection between the first proximal phalange 43 and the first metatarsal 17, and the hypothenar eminence, which is the connection between the fifth metatarsal 25 and the fifth proximal phalange 51, are not clearly visible (the femoral heads are not enlarged). For this reason, in this embodiment, they are referred to as baby provisional thenar eminence Ba and baby provisional hypothenar eminence SA.

[0040] Such an insole (also called a midsole) on which a baby's foot can be placed is shown in Fig. 1. The baby insole 100 shown in Fig. 1 is formed with a convex part CAa for a baby's transverse arch and a convex part CAb for a baby's medial longitudinal arch. Although no convex part for an lateral longitudinal arch is shown, it may be included.

[0041] In addition, a baby flexion guide groove portion Ra, which will be described later, is formed on the back surface. Furthermore, a baby insole corner portion 100A is formed. As shown in Fig. 1, this baby insole corner portion 100A is composed of a baby insole inner corner portion 100b, a baby insole heel corner 100c, and a baby insole outer corner portion 100a.

[0042] The height of the heel corner 100c of the baby insole at the rear end 100B of the baby insole is very low (the periphery is also low). For example, the height (height from the back surface) is above the center of the rear foot placement area 75A (referred to as the baby insole heel center Pa) on which the rear foot 75 is placed and below the apex of the baby transverse arch protrusion CAa. The shape of the rear foot placement area 75A (also referred to as the heel corresponding area) is approximately elliptical (referred to as 75a).

[0043] In FIG. 1, the insole is shown as a forefoot corresponding region 71A and a midfoot corresponding region 73A. The baby insole outer corner portion 100a gradually increases in height from the vicinity of the baby's hypothetical ball SA, reaches a maximum height around the leading edge of the rear foot placing area 75A, and reaches the rear end 100B of the baby insole.

[0044] Furthermore, the baby insole inner corner portion 100b gradually increases in height from the vicinity of the baby's temporary ball of the foot Ba, reaches a maximum height near the apex of the baby's transverse arch convex portion CAa, and reaches the baby insole rear end 100B.

[0045] The baby flexion induction groove portion Ra is a straight line (called the baby insole heel center line LAa) that passes through the baby insole rear end 100B and the baby insole heel center Pa to the baby insole tip 100F. Furthermore, the baby flexion induction groove portion Ra is engraved on the back surface at θa degrees (30 degrees to 38 degrees: preferably 34 degrees) with respect to a straight line LAb passing through the center of the baby's provisional little ball SA and the center of the baby's provisional thenar ball Ba.

[0046] This baby bending induction groove portion Ra has a width of 2 mm to 3 mm (preferably about 2.5 mm), a length of 30 mm to 40 mm (preferably 35 mm), and a depth of 0.3 mm to 0.6 mm (preferably about 0.4 mm). Specifically, one end of the baby flexion induction groove portion Ra is located near the area between the third proximal phalanx 47 and the head of the third metatarsal bone 21, and the other end passes near the bottom of the head of the first metatarsal bone 17 and reaches the inner edge.

[0047] Next, the detailed structure of the baby insole will be described with reference to Figures 5 and 6. However, the description of the same reference numerals as those in the above figures will be omitted. FIG. 5(a) is a back view of the baby insole 100, FIG. 5(b) is a side view of the baby insole 100 as viewed from the medial edge of the foot, and FIG. 5(c) is a cross-sectional view along A5-A5 (La line) in FIG. 5(a).

[0048] Fig. 6 is a cross-sectional view of the baby insole 100. Fig. 6(a) is a cross-sectional view taken along A1-A1 in Fig. 5(a), and Fig. 6(b) is a cross-sectional view taken along A2-A2 in Fig. 5(a). Fig. 6(c) is a cross-sectional view taken along A3-A3 in Fig. 5(a), and Fig. 6(d) is a cross-sectional view taken along A4-A4 in Fig. 5(a). Fig. 6(e) is a view seen from the Fa direction in Fig. 5(a).

[0049] As shown in Figures 5(b) and 5(c), the baby insole 100 is formed by pressing together a lower layer member (hereinafter referred to as baby lower layer member 110: urethane), an upper layer member (hereinafter referred to as baby upper layer member 120: urethane), and a surface layer member (hereinafter referred to as baby surface layer member 130: fabric, nonwoven fabric, gauze).

[0050] This baby lower layer member 110 is also called a height-adjustable sheet member because it allows the height of the insole to be adjusted according to the child's growth. The above-mentioned baby lower layer member 110 is attached to the entire back surface as shown in FIG. 5(a), and the baby upper layer member 120 can be peeled off.

[0051] The baby upper layer member 120 and the baby lower layer member 110 are bonded together by heat and pressure, so that the surface (front surface) of the baby lower layer member 110 which comes into contact with the baby upper layer member 120 sticks to the bottom surface (back surface) of the baby upper layer member 120, and when the shoes become too small due to growth, the baby lower layer member 110 is peeled off.

[0052] 5(a), a baby flexion guide groove portion Ra is formed in the baby lower layer member 110 (thickness: about 1 mm) and the baby upper layer member 120 (thickness: about 2 mm in the region corresponding to the front feet). The baby flexion guide groove portion Ra will be described in detail later, but it is composed of a "diagonal cut-out portion" having a width of 2 mm to 3 mm (preferably about 2.5 mm) and a length of 30 mm to 40 mm (preferably 35 mm) and an upper layer guide groove (depth: 0.3 mm to 0.6 mm (preferably about 0.4 mm), width: 0.6 mm to 1 mm (preferably about 0.6 mm), length: about 28 mm to 38 mm (preferably about 34 mm)) provided on the back of the baby upper layer member 120.

[0053] As shown in FIG. 5(b), the baby insole inner corner portion 100b gradually rises from the vicinity of the baby flexion-inducing groove portion Ra, and the height of the inner edge facing the vicinity of the baby transverse arch convex portion CAa is hb7 (11 mm to 13 mm: preferably 12 mm (including the surface layer and the baby lower layer member 110)).

[0054] In FIG. 5(b), the surface line (dotted line) of the baby underlayer member 110 in the A5-A5(La) cross section in FIG. 5(a) is indicated as "Lad". Also, the surface of the outer corner portion 100a of the baby insole seen in the A5-A5(La) cross section in FIG. 5(a) is indicated as "Lad". emphasis It is shown by a line. As shown in FIG. 5(c), the height of the forefoot corresponding area is ha1 (2.5 to 3.3 mm: preferably 3.0 mm), the height of the apex of the baby's transverse arch convex portion CAa is ha2 (5.0 to 6.0 mm: preferably 5.41 mm), and the height ha3 (thickness) of the heel corresponding area near the baby insole heel center Pa5 is 3.0 to 3.4 mm (preferably 3.26 mm).

[0055] The height of the baby insole rear end 100B is ha4 (3.8 to 4.8 mm: preferably 4.5 mm). Furthermore, in Figures 5(a), 5(b), and 5(c), lines Lm1, Lk1, and Lk2 are shown to explain that baby lower layer component 110 is embedded in baby upper layer component 120. However, while Figure 5(b) shows baby lower layer component 110 from the backside with diagonal lines, not all of this diagonal line is baby lower layer component 110. In reality, it is between lines Lm1 and Lk1. Details will be explained in Figure 13 below.

[0056] That is, as shown in Fig. 5(b), when viewed from the inside of the foot, the baby lower layer member 110 cannot be seen between Lm1 and Lk1 because it is embedded in the baby upper layer member 120. For this reason, in Fig. 5(b), the baby lower layer member 110 is shown by a dotted line, and the area between Lk1 and Lk2 (100B) is left white to indicate that it is the baby upper layer member 120. Also, in FIG. 5(b), the range in which the height drops sharply toward 100B is indicated as Lah (5 mm to 10 mm: preferably 8 mm).

[0057] Next, a detailed description will be given with reference to Fig. 6. As shown in Fig. 6(a), the height is da1 (3.8 to 4.5 mm: preferably 4.01 mm) in the A1-A1 cross section of Fig. 5(a). 6(b), the height da2 (5.0 to 5.5 mm: preferably 5.36 mm) is shown in the A2-A2 cross section of FIG. 5(a). The apex of the convex portion CAa for baby's transverse arch is located 3 to 5 mm forward from the area between the center of the second metatarsal bone 19 and the center of the third metatarsal bone 21.

[0058] Also, as shown in Fig. 6(c), the height is da3 (3.1 to 3.5 mm: preferably 3.28 mm) in the A3-A3 cross section of Fig. 6(a). As shown in Fig. 6(c), the A3-A3 cross section is the part corresponding to the heel, and since it is thin in height (thickness), the convex part CAa for the baby's transverse arch is visible.

[0059] As shown in Fig. 6(d), the A4-A4 cross section in Fig. 5(a) has a height da4 (3.9 to 4.3 mm: preferably 4.16 mm). As shown in Fig. 6(d), the A4-A4 cross section is a place where the baby insole heel corner 100c begins to be formed in the heel portion corresponding region, so it is slightly higher than the A3-A3 cross section.

[0060] Fig. 6(e) is a side view of the heel corner 100c of the baby insole from the Fa direction in Fig. 5(a), and compared to the height da4 (3.9-4.3mm: preferably 4.16mm) of the A4-A4 cross section, the height is ha4 (3.8-4.8mm: preferably 4.5mm), which is almost the same as the height of the heel corresponding area. In other words, the circumference of 100B is low. That is, when the baby insole 100 is placed in a baby shoe (not shown) and the baby's foot is put in, the heel portion comes into close contact with the rear upper.

[0061] Therefore, the foot will not slip forward, and the heel (rear foot) will not slip sideways either, since it is surrounded by the baby insole inner corner 100b and the baby insole outer corner 100a. In addition, the baby transverse arch convex portion CAa is low in height, so it does not affect the skeletal development of the infant. Furthermore, since the baby flexion induction groove portion Ra is formed, the infant can walk straight without affecting the skeletal development.

[0062] (For Toddlers) For toddlers, the foot skeleton, forefoot, midfoot, rear foot, forefoot corresponding area, midfoot corresponding area, and rear foot corresponding area will be explained using the same reference numerals as in the above figure.

[0063] As shown in FIG. 2, the foot for toddlers includes the foot skeleton consisting of the first distal phalange 53, the first proximal phalange 43, the second distal phalange 57, the second middle phalange 55, the second proximal phalange 45, the third distal phalange 61, the third middle phalange 59, the third proximal phalange 47, the fourth distal phalange 65, the fourth middle phalange 63, the fourth proximal phalange 49, the fifth distal phalange 69, the fifth middle phalange 67, the fifth proximal phalange 51, the first metatarsal 17, the second metatarsal 19, the third metatarsal 20, and the fourth distal phalange 21. 1, the fourth metatarsal 23, the fifth metatarsal 25, the first cuneiform bone 9, the cuboid bone 15, the talus 3, and the calcaneus 1. The bone ends of the bones constituting the forefoot 71 and the midfoot 73 are visible, and the head 77b of the second metatarsal 19, the head 77c of the third metatarsal 21, the head 77d of the fourth metatarsal 23, and the head 77e of the fifth metatarsal 25 are visible, but the second cuneiform, third cuneiform, and navicular bones are not visible.

[0064] However, compared to a baby's foot, although the bones have become slightly larger, the ball of the big toe and the ball of the little toe have not yet clearly appeared (the femoral head has not yet enlarged). In order to distinguish from the insole for babies described above, in this embodiment, they are called the toddler's provisional ball of the big toe Bb and the toddler's provisional ball of the little toe SB. Such insoles used for toddler feet are called toddler insoles 200.

[0065] The toddler insole 200 shown in FIG. 2 has a toddler transverse arch protrusion CBa, a toddler medial longitudinal arch protrusion CBb, and a toddler lateral longitudinal arch protrusion CBc.

[0066] The rear surface of the insole is formed with a toddler flexion guide groove Rb, which will be described later. In addition, the insole corner 200A is formed with the toddler insole inner corner 200b, the toddler insole heel corner 200c, and the toddler insole outer corner 200a, as shown in FIG.

[0067] The toddler insole heel corner 200c is very low in height at the toddler insole rear end 200B. For example, the height (height from the back surface) is above the center of the rear foot placement area 75A (referred to as the toddler insole heel center Pb) on which the rear foot 75 is placed and below the apex of the toddler transverse arch protrusion CBa. The rear foot placement area 75A (also referred to as the heel corresponding area) is substantially elliptical in shape.

[0068] In FIG. 2, the insole is shown as a forefoot corresponding region 71A and a midfoot corresponding region 73A. Additionally, the toddler insole outer corner portion 200a gradually increases in height from the vicinity of the toddler's provisional little toe ball SB, reaches a maximum height around the leading edge of the rear foot placing area portion 75A, and then reaches the toddler insole rear end 200B.

[0069] Furthermore, the toddler insole inner corner portion 200b gradually increases in height from the vicinity of the toddler's ball of the foot Bb, reaches a maximum height near the apex of the toddler's lateral arch convex portion CBa, and then reaches the toddler insole rear end 200B.

[0070] Further, toddler flexion induction groove portion Rb describes a straight line (called toddler insole heel center line LBa) that passes through toddler insole rear end 200B and toddler insole heel center Pb and reaches toddler insole tip 200F. Furthermore, the toddler's flexion induction groove portion Rb is engraved on the back surface at θb degrees (30 degrees to 38 degrees: preferably 34 degrees) with respect to a straight line LBb passing through the center of the toddler's provisional little ball SB and the center of the toddler's provisional ball Bb.

[0071] This toddler flexion induction groove portion Rb has a width of 2 mm to 3 mm (preferably about 2.5 mm), a length of 30 mm to 40 mm (preferably 35.5 mm), and a depth of 0.3 mm to 0.6 mm (preferably about 0.4 mm). Specifically, one end Rba of the toddler flexion-inducing groove portion Rb is located near the area between the head 77c of the third metatarsal bone 21 and the third proximal phalanx 47, and the other end Rbb passes diagonally near the bottom of the head of the first metatarsal bone 17 to reach the inner edge.

[0072] Next, the detailed structure of the toddler insole will be described with reference to Figures 7 and 8. However, explanations of the same reference numerals as in the above figures will be omitted. FIG. 7(a) is a back view of toddler insole 200, FIG. 7(b) is a side view of toddler insole 200 as viewed from the medial edge of the foot, and FIG. 7(c) is a cross-sectional view taken along B5-B5 (line Lb) in FIG. 7(a).

[0073] Fig. 8 is a cross-sectional view of the toddler insole 200. Fig. 8(a) is a cross-sectional view taken along B1-B1 in Fig. 7(a), and Fig. 8(b) is a cross-sectional view taken along B2-B2 in Fig. 7(a). Fig. 8(c) is a cross-sectional view taken along B3-B3 in Fig. 7(a), and Fig. 8(d) is a cross-sectional view taken along B4-B4 in Fig. 7(a). Fig. 8(e) is a view seen from the Fb direction in Fig. 7(a).

[0074] As shown in Figures 7(b) and 7(c), toddler insole 200 is formed by pressing together toddler lower layer member 210 (urethane), toddler upper layer member 220 (urethane), and toddler surface layer member 230 (fabric, nonwoven fabric, or gauze). The lower layer member 220 described above is attached to the entire back surface as shown in FIG. 7(a), and the upper layer member 220 can be peeled off.

[0075] Since upper layer 220 and toddler lower layer 210 are bonded together by thermocompression, the surface (front surface) of toddler lower layer 210 that comes into contact with toddler upper layer 220 (the thickness of the area corresponding to the forefoot is approximately 2.3 mm) adheres to the lower surface (rear surface) of toddler lower layer 210, and when the shoes become too small due to growth, toddler lower layer 210 is peeled off.

[0076] 7(a), a toddler bending induction groove portion Rb is formed in the toddler lower layer member 210. Details of this toddler bending induction groove portion Rb will be described later, but the toddler lower layer member 210 (about 1 mm thick) is provided with a "diagonal cut portion" having a width of 2 mm to 3 mm (preferably about 2.5 mm) and a length of 30 mm to 40 mm (preferably 35 mm), and the upper layer side induction groove provided in the upper layer member 220 (depth of 0.3 mm to 0.6 mm (preferably about 0.4 mm), width of 0.6 mm to 1 mm (preferably about 0.6 mm), length of about 28 mm to 38 mm (preferably about 36 mm)).

[0077] As shown in FIG. 7(b), the inner corner portion 200b of the upper layer member 210 of the toddler insole gradually rises from near the toddler flexion-inducing groove portion Rb, and reaches a height hb7 (12 mm to 14 mm: preferably 13 mm (including the surface layer and toddler lower layer member 210)) near the toddler lateral arch convex portion CBa.

[0078] In Fig. 7(b), the surface line (dotted line) of the toddler lower layer member 210 in the B5-B5(Lb) cross section in Fig. 7(a) is indicated as "Lbd." Also, the surface of the toddler insole outer corner portion 200a seen in the B5-B5(Lb) cross section in Fig. 7(a) is indicated by a twenty-dotted line.

[0079] Also, as shown in FIG. 7(c), the height of the forefoot corresponding area is hb1 (2.7 to 3.8 mm: preferably 3.6 mm), the height of the apex of the toddler's transverse arch convex portion CBa is hb2 (6.0 to 8.0 mm: preferably 7.53 mm), and the height hb3 (thickness) of the heel corresponding area near the toddler insole heel center Pb is 4.0 to 4.5 mm (preferably 4.47 mm).

[0080] The height of the toddler insole rear end 200B is hb4 (6.3 to 7.3 mm: preferably 6.8 mm). Furthermore, in Figures 7(a), 7(b), and 7(c), lines Lm2, Lk3, and Lk4 are shown to explain that toddler lower component 210 is embedded in toddler upper component 220. However, while Figure 7(b) shows toddler lower component 210 from the backside with diagonal lines, not all of this diagonal line is toddler lower component 210. In reality, it is between lines Lm2 and Lk2. Details will be explained in Figure 13, which will be described later.

[0081] That is, as shown in Fig. 7(b), when viewed from the inside of the foot, the toddler lower layer member 210 cannot be seen between Lm2 and Lk3 because it is embedded in the toddler upper layer member 220. For this reason, in Fig. 7(b), the toddler lower layer member 210 is shown by a dotted line, and the area between Lk3 and Lk4 (200B) is left white to indicate that it is the toddler upper layer member 220. Also, in FIG. 7(b), the portion where the height suddenly drops toward 200B is similar to Lah (5 mm to 10 mm: preferably 8 mm) in FIG. 5(b).

[0082] Next, a detailed description will be given with reference to Fig. 8. As shown in Fig. 8(a), the height is db1 (4.3 to 4.8 mm: preferably 4.48 mm) in the B1-B1 cross section of Fig. 7(a). As shown in FIG. 8(b), the height is db2 (6.8 to 7.3 mm: preferably 7.17 mm) in the cross section taken along line B2-B2 in FIG. 7(a).

[0083] Also, as shown in Fig. 8(c), the height db3 (4.1 to 4.6 mm: preferably 4.52 mm) is shown in the B3-B3 cross section of Fig. 7(a). As shown in Fig. 8(c), the B3-B3 cross section is the area corresponding to the heel, and since it is thin in height (thickness), the toddler lateral arch convex portion CBa is visible.

[0084] Also, as shown in Fig. 8(d), the height is db4 (4.8 to 5.3 mm: preferably 5.17 mm) in the B4-B4 cross section of Fig. 7(a). The B4-B4 cross section is slightly higher than the B3-B3 cross section.

[0085] 8(e) is a side view of toddler insole heel corner 200c seen from the Fc direction in FIG. 7(a), and compared to the B4-B4 cross section, the height is hb4 (5.8-6.8 mm: preferably 6.5 mm: 200B), which is slightly higher than the height of the heel corresponding area. In other words, when toddler insole 200 is placed in a toddler shoe (not shown) and the toddler's foot is placed in it, the heel part comes into close contact with the rear upper.

[0086] Therefore, the foot will not slip forward, and since the heel (rear foot) is surrounded by toddler insole inner corner portion 200b and toddler insole outer corner portion 200a, the foot will not slip sideways either. In addition, the toddler lateral arch convex portion CBa is low in height and does not affect the skeletal development of the toddler. Furthermore, the toddler flexion induction groove portion Rb is formed, allowing the toddler to walk straight.

[0087] (Pre-Junior) As shown in FIG. 3, the foot for pre-juniors basically has the same foot skeleton as that of an adult, but the bones are still developing, particularly the first distal phalange 53, the first proximal phalange 43, the second distal phalange 57, the second middle phalange 55, the second proximal phalange 45, the third distal phalange 61, the third middle phalange 59, the third proximal phalange 47, the fourth distal phalange 65, the fourth middle phalange 63, the fourth proximal phalange 49, the fifth distal phalange 69, the fifth middle phalange 67, the fifth proximal phalange 51, the first metatarsal 17, the second metatarsal 19, the third In the metatarsal bone 21, the fourth metatarsal bone 23, and the fifth metatarsal bone 25, the epiphyseal portion appears, but the connection to the diaphysis is weak due to the cartilaginous connection by the epiphyseal cartilage. The first cuneiform bone 9, the second cuneiform bone 11, the third cuneiform bone 13, the cuboid bone 15, the navicular bone 7, the calcaneus 1, and the talus 3 appear, but the bone shapes are round and are not yet strong enough to form a strong joint.

[0088] Therefore, as shown in Figure 3, all of the bones that make up the foot have appeared, and this state will be the basic state for growth. From this period, it is important to gradually maintain the three arches, which are the basic structure of the foot skeleton, in the correct position. In adults, in order to maintain the medial longitudinal arch, the apex of the medial longitudinal arch is located directly below the navicular bone 7 which constitutes its apex. However, since the shape of bones that are still developing does not form a strong joint, the apex is located near the center of the medial longitudinal arch, and the medial longitudinal arch is maintained as a whole, and the function of preventing the foot from falling inward is required.

[0089] In addition, with regard to the transverse arch, the ligaments and muscles connecting the first metatarsal bone 17 to the fifth metatarsal bone 25 are still developing, and the bone ends are also emerging and showing the basic bone structure, so it is important to apply pressure to the transverse arch portion to promote the correct formation of the transverse arch. On the other hand, as the cuboid bone 15 that constitutes the lateral longitudinal arch is growing, the lateral longitudinal arch is required to have a function that prevents the foot from falling outward due to pressure from the lateral longitudinal arch portion in order to maintain the bone alignment, and it is necessary to increase stability by having the medial longitudinal arch portion and the lateral longitudinal arch portion sandwich the foot from both sides.

[0090] The heel, or calcaneus 1, which is important when standing and walking, has developed considerably but is still unstable and does not provide sufficient support for the entire foot. Therefore, it is necessary to support the calcaneus 1 vertically by the corners and to support the rear foot 75. Additionally, the thenar eminence, which is the connection between the first proximal phalange 43 and the first metatarsal 17, and the hypothenar eminence, which is the connection between the fifth metatarsal 25 and the fifth proximal phalange 51, are also incomplete (the femoral head has not fully enlarged). For this reason, in this embodiment, they are referred to as pre-junior thenar eminence Bc and pre-junior hypothenar eminence SC.

[0091] Such an insole (also called an inner sole) on which a pre-junior's foot can be placed is shown in Fig. 3. The pre-junior insole 300 shown in Fig. 3 is formed with a convex portion CCa for a pre-junior's transverse arch, a convex portion CCb for a pre-junior's medial longitudinal arch, and a convex portion CCc for a pre-junior's lateral longitudinal arch.

[0092] Also, the back surface is formed with a pre-junior flexion induction groove portion Rc, which will be described later. Furthermore, a pre-junior insole corner portion 300A is formed. As shown in Fig. 3, this pre-junior insole corner portion 300A is composed of a pre-junior insole inner corner portion 300b, a pre-junior insole heel corner 300c, and a pre-junior insole outer corner portion 300a. In other words, 300B is low.

[0093] The height of the pre-junior insole rear end 300B is very low at the outer corner 300a of the pre-junior insole. For example, the height (height from the back surface) is above the center of the rear foot placement area 75A (referred to as the pre-junior insole heel center Pc) on which the rear foot 75 is placed and below the apex of the pre-junior transverse arch protrusion CCa. The shape of the rear foot placement area 75A (also referred to as the heel corresponding area) is approximately elliptical. In FIG. 3, the insole is shown as a forefoot corresponding region 71A and a midfoot corresponding region 73A.

[0094] Additionally, pre-junior insole outer corner portion 300a gradually increases in height from the vicinity of pre-junior little toe SC, reaches a maximum height around the leading edge of rear foot placing area portion 75A, and reaches pre-junior insole rear end 300B. On the other hand, the pre-junior insole inner corner portion 300b gradually increases in height from the vicinity of the pre-junior ball of the foot BC, reaches a maximum height near the apex of the pre-junior transverse arch convex portion CCa, and reaches the pre-junior insole rear end 300B.

[0095] Also, pre-junior flexion induction groove portion Rc describes a straight line (referred to as pre-junior insole heel center line LCa) that passes through pre-junior insole rear end 300B and pre-junior insole heel center Pc to pre-junior insole tip 300F. Furthermore, the pre-junior flexion induction groove portion Rc is engraved on the back surface at θc degrees (25 degrees to 35 degrees: preferably 32 degrees) with respect to a straight line LCb passing through the center of the pre-junior little ball SC and the center of the pre-junior big toe BC.

[0096] Specifically, one end Rca of the pre-junior flexion-inducing groove portion Rc is located near the area between the third proximal phalanx 47 and the head of the third metatarsal bone 21, and the other end Rcb passes diagonally near the bottom of the head of the first metatarsal bone 17 to reach the inner edge.

[0097] Next, the detailed structure of the pre-junior insole will be described with reference to Figures 9 and 10. However, explanations of the same reference numerals as in the above figures will be omitted. Figure 9(a) is a back view of pre-junior insole 300, Figure 9(b) is a side view of pre-junior insole 300 as viewed from the medial edge of the foot, and Figure 9(c) is a cross-sectional view along C5-C5 (line Lc) in Figure 9(a).

[0098] Figure 10 is a cross-sectional view of the pre-junior insole 300. Figure 10(a) is a cross-sectional view taken along C1-C1 in Figure 9(a), and Figure 10(b) is a cross-sectional view taken along C2-C2 in Figure 9(a). Figure 10(c) is a cross-sectional view taken along C3-C3 in Figure 9(a), and Figure 10(d) is a cross-sectional view taken along C4-C4 in Figure 9(a). Figure 10(e) is a view taken from the Fc direction in Figure 9(a).

[0099] As shown in Figures 9(b) and 9(c), the pre-junior insole 300 is formed by pressing a pre-junior lower layer member 310 (urethane), a pre-junior upper layer member 320 (urethane), and a pre-junior surface layer member 330 (fabric, nonwoven fabric, gauze). As shown in Figure 9(a), the pre-junior lower layer member 310 is attached to the entire back surface, and the pre-junior upper layer member 320 can be peeled off.

[0100] The pre-junior upper layer member 320 and the pre-junior lower layer member 310 are bonded by heat compression, so that the surface (front surface) of the pre-junior lower layer member 310 which comes into contact with the pre-junior upper layer member 320 sticks to the bottom surface (back surface) of the pre-junior lower layer member 310, and when the shoes become too small due to growth, the pre-junior lower layer member 310 is peeled off.

[0101] 9(a), a pre-junior bend guiding groove portion Rc is formed in the pre-junior lower layer member 310. Details of this pre-junior bend guiding groove portion Rc will be described later, but it is made up of a "diagonal cut portion" having a width of 3.5mm to 4mm (preferably about 3.2mm) and a length of 35mm to 43mm (preferably 40mm) provided in the pre-junior lower layer member 310 (thickness is about 1mm to 2mm: preferably 1.5mm), and an upper layer guide groove [(depth is 0.8mm to 1.0mm (preferably about 0.8mm), width is 0.7mm to 1.2mm (preferably about 0.8mm), and length is about 30mm to 40mm (preferably about 38mm)) provided in the pre-junior upper layer member 320.

[0102] As shown in FIG. 9(b), the pre-junior insole inner corner portion 300b of the pre-junior upper layer member 320 gradually rises from the vicinity of the pre-junior flexion-inducing groove portion Rc, and reaches a height hc7 (14 mm to 17 mm: preferably 15.5 mm (including the surface layer and pre-junior lower layer member 310)) near the pre-junior lateral arch convex portion CCa.

[0103] In addition, in FIG. 9(b), the surface line (dotted line) of the pre-junior lower layer member 310 in the C5-C5(Lc) cross section in FIG. 9(a) is indicated as "Lcd". Also, the surface of the outer corner portion 300a of the pre-junior insole seen in the C5-C5(Lc) cross section in FIG. 9(a) is indicated as "Lcd". emphasis It is shown by a line.

[0104] Also, as shown in FIG. 9(c), the height of the forefoot corresponding area is hc1 (3.5 to 4.5 mm: preferably 4.08 mm), the height of the apex of the pre-junior transverse arch convex portion CCa is hc2 (6.5 to 7.5 mm: preferably 6.88 mm), and the height hc3 (thickness) of the heel corresponding area near the pre-junior insole heel center Pc is 2.5 to 3.4 mm (preferably 2.75 mm).

[0105] The height of the pre-junior insole rear end 300B is hc4 (3.4 to 4.2 mm: preferably 3.8 mm). Furthermore, in Figures 9(a), 9(b), and 9(c), lines Lm3, Lk5, and Lk6 are shown to explain that pre-junior lower layer member 310 is embedded in pre-junior upper layer member 320. However, while Figure 9(b) shows pre-junior lower layer member 310 from the back side with diagonal lines, not all of these diagonal lines are pre-junior lower layer member 310. In reality, it is between lines Lm3 and Lk5. Details will be explained in Figure 13, which will be described later.

[0106] That is, as shown in Fig. 9(b), when viewed from the inside of the foot, the range between Lm3 and Lk5 of pre-junior lower layer member 310 is not visible because it is embedded in pre-junior upper layer member 320. For this reason, in Fig. 9(b), pre-junior lower layer member 310 is shown by a dotted line, and the area between Lk5 and Lk6 (300B) is left white to indicate that it is pre-junior upper layer member 320.

[0107] Also, in FIG. 9(b), the point where the height begins to drop sharply toward 300B is around hc8. Next, a detailed description will be given with reference to Fig. 10. As shown in Fig. 10(a), in the C1-C1 cross section of Fig. 9(a), the height is dc1 (3.8 to 4.5 mm: preferably 4.08 mm). As shown in FIG. 10(b), the height in the C2-C2 cross section of FIG. 9(a) is dh2 (6.5 to 7.0 mm: preferably 6.97 mm).

[0108] Also, as shown in Fig. 10(c), the height is dc3 (2.8 to 3.5 mm: preferably 3.13 mm) in the C3-C3 cross section of Fig. 10(a). As shown in Fig. 10(c), the C3-C3 cross section is the part corresponding to the heel part, and since it is thin in height (thickness), the convex part CCa for the pre-junior transverse arch is visible.

[0109] As shown in Fig. 10(d), the A4-A4 cross section in Fig. 5(a) has a height da4 (3.9 to 4.3 mm: preferably 4.16 mm). As shown in Fig. 6(d), the A4-A4 cross section is a place where the baby insole heel corner 100c begins to be formed in the heel portion corresponding region, so it is slightly higher than the A3-A3 cross section.

[0110] Also, Figure 10(e) is a side view of the pre-junior insole heel corner 300c viewed from the Fc direction of Figure 9(a). Compared to the height dc4 (3.9 to 4.3 mm: preferably 4.16 mm) of the C4-C4 cross section, the height is hc4 (3.8 to 4.8 mm: preferably 4.5 mm), which is approximately the same as the height of the heel corresponding area.

[0111] That is, when the pre-junior insole 300 is placed in a pre-junior shoe (not shown) and the foot is put in, the heel is in close contact with the rear upper. Therefore, the foot does not slip forward, and the heel (rear foot part) is surrounded by the pre-junior insole inner corner 300b and the pre-junior insole outer corner 300a, so the foot does not slip sideways.

[0112] In addition, the height of the transverse arch convex part CCa for pre-juniors is only slightly higher than that of toddlers, so it does not affect the skeletal formation of pre-juniors. Furthermore, the bending induction groove part Rc for pre-juniors is formed, so that the child can walk straight.

[0113] (Junior) As shown in FIG. 4, the foot of a junior is basically similar to that of an adult in terms of the foot skeleton, but the bones are still developing and already have the small shape of an adult. In particular, the first distal phalange 53, the first proximal phalange 43, the second distal phalange 57, the second middle phalange 55, the second proximal phalange 45, the third distal phalange 61, the third middle phalange 59, the third proximal phalange 47, the fourth distal phalange 65, the fourth middle phalange 63, the fourth proximal phalange 49, the fifth distal phalange 69, the fifth middle phalange 67, and the fifth proximal phalange In the case of bone 51, first metatarsal 17, second metatarsal 19, third metatarsal 21, fourth metatarsal 23, and fifth metatarsal 25, the epiphysis is developed and is connected to the diaphysis by a cartilaginous connection via epiphyseal cartilage, but has a certain degree of strength. In the case of first cuneiform bone 9, second cuneiform bone 11, third cuneiform bone 13, cuboid bone 15, navicular bone 7, calcaneus 1, and calcaneus 3, although they have not yet reached the point of forming a strong joint, they have a certain degree of strength and are in a state similar to that of an adult.

[0114] For this reason, in this embodiment, the ball of the big toe is referred to as junior ball of the big toe Bd, and the ball of the little toe is referred to as junior ball of the little toe SD. Such an insole (also called a midsole) on which a junior's foot can be placed is shown in Fig. 4. The junior insole 400 shown in Fig. 4 is formed with a junior's transverse arch convex portion CDa, a junior's medial longitudinal arch convex portion CDb, and a junior's lateral longitudinal arch convex portion CDc.

[0115] In addition, a baby flexion induction groove portion Rd, which will be described later, is formed on the back surface. Furthermore, a junior insole corner portion 400A is formed. As shown in Fig. 4, this junior insole corner portion 400A is composed of a junior insole inner corner portion 400b, a junior insole heel corner 400c, and a junior insole outer corner portion 400a.

[0116] The height of the junior insole rear end 400B of the aforementioned junior insole outer corner 400a is very low. For example, the height (height from the back surface) is above the center of the rear foot placement area 75A (referred to as the junior insole heel center Pd) on which the rear foot 75 is placed and below the apex of the junior transverse arch convex part CCa. The shape of the rear foot placement area 75A (also referred to as the heel corresponding area) is approximately elliptical.

[0117] In FIG. 4, the insole is shown as a forefoot corresponding region 71A and a midfoot corresponding region 73A. The junior insole outer corner portion 400a gradually increases in height from the vicinity of the junior little toe SD, reaches a maximum height around the leading edge of the rear foot placing area 75A, and reaches the junior insole rear end 400B.

[0118] Furthermore, the junior insole inner corner portion 400b gradually increases in height from the vicinity of the junior ball Bd, reaches a maximum height near the apex of the junior transverse arch convex portion CCa, and reaches the junior insole rear end 400B. The junior flexion induction groove portion Rd is a straight line (called the junior insole heel center line LDa) that passes through the junior insole rear end 400B and the junior insole heel center Pd to the junior insole tip 400F.

[0119] Furthermore, the junior flexion induction groove portion Rd is engraved on the back surface at θd degrees (25 degrees to 36 degrees: preferably 35 degrees) with respect to a straight line LDb passing through the center of the junior little toe ball SD and the center of the junior big toe ball BD. This junior flexion induction groove portion Rd has a width of 3.5 mm to 5 mm (preferably about 4.5 mm), a length of 35 mm to 50 mm (preferably 40 mm), and a depth of 0.5 mm to 1 mm (preferably about 0.8 mm).

[0120] Specifically, one end Rda of the junior flexion-inducing groove portion Rd is located near the area between the third proximal phalanx 47 and the head of the third metatarsal bone 21, and the other end Rdb passes diagonally near the bottom of the head of the first metatarsal bone 17 to reach the inner edge. Next, the detailed structure of the junior insole will be described with reference to Figures 11 and 12. However, the description of the same reference numerals as in the above figures will be omitted.

[0121] FIG. 11(a) is a back view of a junior insole 400, FIG. 11(b) is a side view of the junior insole 400 as viewed from the medial edge of the foot, and FIG. 11(c) is a cross-sectional view of D5-D5 (Ld line) in FIG. 11(a). Figure 12 is a cross-sectional view of a cut piece of junior insole 400. Figure 12(a) is a cross-sectional view taken along D1-D1 in Figure 11(a), and Figure 12(b) is a cross-sectional view taken along D2-D2 in Figure 11(a). Fig. 12(c) is a cross section taken along line D3-D3 in Fig. 6(a), Fig. 12(d) is a cross section taken along line D4-D4 in Fig. 12(a), and Fig. 12(e) is a view seen from the Fd direction in Fig. 11(a).

[0122] As shown in Figures 11(b) and 11(c), the junior insole 400 is formed by pressing together a junior lower layer member 410 (urethane), a junior upper layer member 420 (urethane), and a junior surface layer member 430 (fabric, nonwoven fabric, gauze). As shown in Figure 11(a), the aforementioned junior lower layer member 410 is attached to the entire back surface, and the junior upper layer member 420 can be peeled off.

[0123] The junior upper layer member 420 and the junior lower layer member 410 are bonded together by heat bonding, so that the surface (front surface) of the junior lower layer member 410 which comes into contact with the junior upper layer member 420 sticks to the bottom surface (back surface) of the junior upper layer member 420, and when the shoes become too small due to growth, the junior lower layer member 410 is peeled off.

[0124] 11(a), a junior flexion induction groove portion Rd is formed in the junior lower layer member 410 (thickness: about 1 mm to 2 mm, preferably 1.5 mm) and the junior upper layer member 420 (forefoot corresponding region thickness: about 3 mm). The junior flexion induction groove portion Rd will be described in detail later, but it is composed of a "diagonal cut portion" having a width of 4 mm to 6 mm (preferably about 4.5 mm) and a length of 40 mm to 46 mm (preferably 43 mm), and a junior upper layer guide groove [(depth: 0.5 mm to 1.3 mm (preferably about 1.0 mm), width: 2.3 mm to 3.5 mm (preferably about 3.0 mm), length: about 40 mm to 43 mm (preferably about 41 mm)] provided in the junior upper layer member 420.

[0125] As shown in FIG. 11(b), the inner corner portion 400b of the junior insole gradually rises from the vicinity of the junior flexion-inducing groove portion Rd, and reaches a height hd7 (12 mm to 14 mm: including the surface layer and the junior lower layer member 410) near the junior transverse arch convex portion CCa. In FIG. 11(b), the surface line (dotted line) of the junior lower layer member 410 in the D5-D5(Ld) cross section in FIG. 11(a) is indicated as "Ldd". Also, the surface of the outer corner portion 400a of the junior insole seen in the D5-D5(Ld) cross section in FIG. 11(a) is indicated as "Ldd". emphasis It is shown by a line.

[0126] As shown in FIG. 11(c), the height of the forefoot corresponding area is hd1 (2.5 to 3.3 mm: preferably 3.0 mm), the height of the apex of the junior transverse arch convex portion CCa is hd2 (7.0 to 8.0 mm: preferably 7.56 mm), and the height hd3 (thickness) of the heel corresponding area near the junior insole heel center Pd is 3.2 mm to 3.6 mm (preferably 3.46 mm).

[0127] The height of the junior insole rear end 400B is hd4 (3.8 to 4.8 mm: preferably 4.5 mm). Furthermore, in Figures 11(a), 11(b), and 11(c), lines Lm5, Lk7, and Lk8 are shown to explain that junior lower layer component 410 is embedded in junior upper layer component 420. However, while Figure 11(b) shows junior lower layer component 410 from the back side with diagonal lines, not all of these diagonal lines are junior lower layer component 410. In reality, they are between lines Lm5 and Lk7. Details will be explained in Figure 13, which will be described later.

[0128] That is, as shown in Fig. 11(b), when viewed from the inside of the foot, the junior lower layer member 410 is not visible between Lm5 and Lk7 because it is embedded in the junior upper layer member 420. For this reason, in Fig. 11(b), the junior lower layer member 410 is shown by a dotted line, and the area between Lk7 and Lk8 (400B) is left white to indicate that it is the junior upper layer member 420.

[0129] 11(b), the portion where the height suddenly drops toward 400B is indicated as hd9 (5 mm to 10 mm: preferably 8 mm). Note that Ldd indicates the surface of junior upper layer member 420 in the D5-D5(Ld) cross section. Next, a detailed description will be given with reference to Fig. 12. As shown in Fig. 12(a), in the D1-D1 cross section of Fig. 11(a), the height is dd1 (3.8 to 4.5 mm: preferably 4.01 mm). As shown in FIG. 12(b), the height is dd2 (5.8 to 6.2 mm: preferably 6.02 mm) in the cross section taken along line D2-D2 of FIG. 11(a).

[0130] Also, as shown in Fig. 12(c), the height is dd3 (3.0 to 3.6 mm: preferably 3.47 mm) in the D3-D3 cross section of Fig. 11(b). As shown in Fig. 12(c), the D3-D3 cross section is the part corresponding to the heel, and since it is thin in height (thickness), the junior transverse arch convex portion CCa is visible.

[0131] As shown in Fig. 12(d), the height in the D4-D4 cross section in Fig. 11(a) is dh4 (3.0 to 3.6 mm: preferably 3.47 mm). As shown in Fig. 12(d), the D4-D4 cross section is a place where the junior insole heel corner 400c starts to be formed in the heel portion corresponding region, so it is slightly higher than the D3-D3 cross section.

[0132] Also, Figure 12(e) is a side view of the junior insole heel corner 400c when viewed from the Fd direction of Figure 6(a). Compared to the height dd4 (3.5 mm) of the D4-D4 cross section, the height is hd4 (3.8 to 4.8 mm: preferably 4.5 mm), which is slightly smaller but is approximately the same as the height of the heel corresponding area.

[0133] That is, when the junior insole 400 is placed in a baby shoe (not shown) and a junior puts his / her foot in it, the heel part comes into close contact with the rear upper part. Therefore, the foot does not slip forward, and the heel part (rear foot part) is surrounded by the junior insole inner corner part 400b and the junior insole outer corner part 400a, so the foot does not slip sideways.

[0134] In addition, the height of each convexity is not much different from that of an adult, so the three arches can be maintained properly. Furthermore, the junior bending induction groove portion Rd is formed, so that the child can walk in a straight line.

[0135] (Detailed explanation of lower and upper layer components) Fig. 13 is a detailed configuration diagram of the lower layer member and the upper layer member of this embodiment. In this embodiment, a junior insole will be described as an example. Fig. 13(a) shows a junior lower layer member 410, Fig. 13(b) shows a junior upper layer member 420, and Fig. 13(c) shows the back surface of a junior insole 400 formed by thermocompression bonding the junior lower layer member 410 to the junior upper layer member 420. Furthermore, FIG. 13(d) shows a mm cross section of FIG. 13(b).

[0136] 13(a), a "diagonal cut" portion Rd1 for forming the junior bending induction groove portion Rd is formed in the junior lower layer member 410. This "diagonal cut" portion Rd1 has a width of 4.0 mm to 6 mm (preferably about 4.5 mm) and a length of 40 mm to 46 mm (preferably 43 mm).

[0137] 13(b), a diagonal groove Rd2 for forming a junior bending induction groove portion Rd is formed on the back side of the junior upper layer member 420. This diagonal groove Rd2 has a width of 3.0 mm to 3.5 mm (preferably about 3 mm) and a length of 40 mm to 43 mm (preferably 41 mm).

[0138] Further, a substantially U-shaped wall 420L is formed on the back side of the junior upper layer member 420. The portion surrounded by the substantially U-shaped wall 420L is concave (see FIG. 13(d)). However, the height of the outer substantially U-shaped wall 420L decreases toward the front side. Therefore, when junior lower layer member 410 is fitted into approximately U-shaped wall 420L of junior upper layer member 420 and bonded by thermocompression, they are integrated as shown in FIG. 13(c).

[0139] (Example of use) In addition, the rear end of the children's insole of this embodiment is low. Therefore, when a child puts the children's insole into a shoe and wears it, as shown in Fig. 14, the heel of the foot rests almost parallel and the heel end is in close contact with the upper. Therefore, even if the child runs energetically, the shoe is unlikely to come off, which is safe. Furthermore, the heel bone is almost enclosed by the corners (inner and outer), making it even safer.

[0140] In addition, FIG. 14 shows an upper 500, a junior insole 400, a midsole 520, and an outsole 540. In other words, by having a flexion-inducing groove portion of a specified angle (θa, θb, θc, θd) on the back surface of the children's insole, when the foot lands while walking or running, it will face more inward than the conventional angle relative to the walking line.

[0141] Specifically, the load direction that passes through the ball of the foot also passes through the load path slightly toward the walking line. In other words, when pushing off, the walking line and the knee's moving direction are approximately parallel, so the user can push off without putting strain on the knees, ankles, and other parts of the body, and therefore can walk without losing posture.

[0142] (Other embodiments) The surface layer may be a fabric such as a woven fabric, a knitted fabric, or a nonwoven fabric, or may be synthetic leather or natural leather, and the lower layer may be an elastic body (sponge, elastomer) or cork.

[0143] Most commercially available sizes of children's footwear are in 1 cm increments, so if it were possible to make fine adjustments in 0.5 cm increments to intermediate sizes, such as 16.5 cm between 16 cm and 17 cm, it would be possible to use shoes as footwear that better fits children's growing feet.

[0144] In other words, when used in children's footwear, when the child grows and the shoes become too tight, the lower layer serving as the size adjustment sheet can be peeled off, allowing fine adjustments in increments of, for example, 0.5 cm.

[0145] In addition, in the above embodiment, the lower layer member is embedded in the upper layer member (the back surface having the approximately U-shaped wall 420L is concave), but the entire back surface of the upper layer member may be flattened and the lower layer member described above may simply be thermocompressed thereto. [Explanation of symbols]

[0146] 1 calcaneus 3 Talus 7 Scaphoid bone 15 cubic bones 17 First metatarsal 19 Second metatarsal 21 Third metatarsal 23 Fourth metatarsal 25 5th metatarsal 27 5th metatarsal base 29 First metatarsal head 31 Second metatarsal head 33 Third metatarsal head 35 Fourth metatarsal head 37 5th metatarsal head 71 Forefoot 73 Midfoot 75 Rear foot 100 Baby Insoles 200 Toddler Insoles 300 Pre-junior insoles 400 Junior Insoles

Claims

1. A baby insole formed by thermocompression bonding a cover member, an upper layer member, and a height-adjustable sheet member, The upper layer member is A convex portion for the medial longitudinal arch and a convex portion for the transverse arch are formed, This lateral arch protrusion is The apex is a gentle shape connected to the protrusion for the medial longitudinal arch of the foot, the apex being equal to or less than the maximum height of the protrusion for the medial longitudinal arch of the foot and equal to or less than the maximum height of the lateral corner of the foot, so as not to correct the transverse arch of the foot skeleton, Furthermore, the height of the rear end of the heel corner of the upper layer member is The height is equal to or greater than the thickness of the heel portion corresponding area below the apex of the transverse arch convex portion, and The back surface of the upper layer member is A diagonal groove is formed that runs diagonally from the area between the third metatarsal and the third proximal phalange to the immediate posterior part of the head of the first metatarsal and to the medial edge. The height adjustment sheet member is This child's insole is characterized in that a "diagonal cut" having a width and length approximately corresponding to the diagonal groove is formed at a location corresponding to the diagonal groove on the back surface of the upper layer member and is heat-pressed to the back surface of the upper layer member.

2. A toddler insole formed by thermocompression bonding a cover member, an upper layer member, and a height-adjustable sheet member, The upper layer member is A convex portion for the medial longitudinal arch of the foot, a convex portion for the lateral arch of the foot, and a convex portion for the lateral longitudinal arch of the foot are formed, The transverse arch protrusion is The apex of the protrusion is equal to or lower than the maximum height of the protrusion for the medial longitudinal arch of the foot and equal to or lower than the maximum height of the lateral corner of the foot, and is connected to the protrusion for the medial longitudinal arch of the foot in a gentle slope. Furthermore, the height of the rear end of the heel corner of the upper layer member is The height of the transverse arch is set to a level equal to or greater than the thickness of the heel-corresponding region below the apex of the transverse arch protrusion, and The back surface of the upper layer member is A diagonal groove is formed that runs diagonally from the area between the third metatarsal and the third proximal phalange to the immediate posterior of the head of the first metatarsal and to the medial edge. The height adjustment sheet member is This child insole is characterized in that a "diagonal cut" having a width and length approximately corresponding to the diagonal groove is formed at a location on the back surface of the upper layer member that corresponds to the diagonal groove, and is heat-pressed to the back surface of the upper layer member.

3. A pre-junior child insole formed by thermocompression bonding a cover member, an upper layer member, and a height-adjustable sheet member, The upper layer member is A convex portion for the medial longitudinal arch of the foot, a convex portion for the lateral arch of the foot, and a convex portion for the lateral longitudinal arch of the foot are formed, The transverse arch protrusion is The apex is connected to the protrusion for the medial longitudinal arch of the foot at a height equal to or lower than the maximum height of the protrusion for the medial longitudinal arch of the foot and equal to or lower than the maximum height of the lateral corner of the foot, Furthermore, the height of the rear end of the heel corner of the upper layer member is The height of the transverse arch is set to a level equal to or greater than the thickness of the heel-corresponding region below the apex of the transverse arch protrusion, and The back surface of the upper layer member is A diagonal groove is formed that runs diagonally from the area between the third metatarsal and the third proximal phalange to the immediate posterior of the head of the first metatarsal and to the medial edge. The height adjustment sheet member is This child's insole is characterized in that a "diagonal cut" having a width and length approximately corresponding to the diagonal groove is formed at a location corresponding to the diagonal groove on the back surface of the upper layer member and is heat-pressed to the back surface of the upper layer member.

4. A junior insole for children formed by thermocompression bonding a cover member, an upper layer member, and a height-adjustable sheet member, The upper layer member is A convex portion for the medial longitudinal arch of the foot, a convex portion for the lateral arch of the foot, and a convex portion for the lateral longitudinal arch of the foot are formed, The transverse arch protrusion is The apex is connected to the protrusion for the medial longitudinal arch of the foot at a height equal to or lower than the maximum height of the protrusion for the medial longitudinal arch of the foot and equal to or lower than the maximum height of the lateral corner of the foot, Furthermore, the height of the rear end of the heel corner of the upper layer member is The transverse arch is adjusted to a height equal to or greater than the thickness of the heel-corresponding region below the apex of the transverse arch protrusion, so as to be close to that of an adult. The back surface of the upper layer member is A diagonal groove is formed that runs diagonally from the area between the third metatarsal and the third proximal phalange to the immediate posterior of the head of the first metatarsal and to the medial edge. The height adjustment sheet member is This child's insole is characterized in that a "diagonal cut" having a width and length approximately corresponding to the diagonal groove is formed at a location corresponding to the diagonal groove on the back surface of the upper layer member and is heat-pressed to the back surface of the upper layer member.

5. The height adjustment sheet member is The upper layer member has a flat plate shape except for the back surface of the corner portion for wrapping the midfoot portion and the rearfoot portion, 5. The children's insole according to claim 1, wherein the insole is removable.

6. 5. The child insole according to claim 1, wherein the upper layer and the height adjustment sheet are made of urethane material.

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