JP7644507B2 - Children's insoles - Google Patents

Description

The present invention relates to insoles for children.

The basic structure of a child's feet is complete by the age of 10, so it is advisable to shape them properly at an early age.

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.

For example, Patent Document 1 divides the development of children's feet into four stages, and provides four different shapes (for ages 0-2, 3-5, 6-7, and 8-10) to support the development of children's feet, allowing it to adapt to the development of children's feet at each stage.

(For ages 0-2 only)
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.

The heel cup is approximately 6mm to 10mm wide and 6mm to 12mm deep.

(For ages 3-5 only)
For 3-5 year olds, the convex part for the inner longitudinal arch is 10-14 mm 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 3-7 mm to align the transverse arch.

The heel cup portion has a width of about 8 mm to 12 mm and a depth of about 8 mm to 14 mm.
Furthermore, the outer longitudinal arch portion is formed into a semi-elliptical shape of about 10 mm to 14 mm.

(For ages 6-7 only)
For 6-7 year olds only, the convex portion for the medial longitudinal arch is formed so that the height near the center is about 12 mm to 16 mm on the inner edge side and gradually becomes lower towards the ends.

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

(For ages 8-10 only)
For 8 to 10 year olds only, the convex portion for the medial longitudinal arch is formed so that the height is about 14 to 18 mm at the inner edge and gradually becomes lower toward the end.
The transverse arch projections are sized to a height of about 7 mm to 11 mm to adjust 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.

Patent No. 43076

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

It is said that the basic bone structure of a child's foot is completed around the age of 10, so at this time it is important to help children develop the habit of walking in a straight line along the running line and to get their bones in good shape.

On the other hand, the insoles for children in Patent Document 1, which are designed for ages 0-2, 3-5, 6-7, and 8-10, 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 insoles for children that are safer even during the active childhood years.

The present invention was made in consideration of the above problems, and aims to provide an insole for children that helps young children develop the habit of walking in a straight line along the running line without putting strain on the knees, ankles, and other parts of the body, and that prevents shoes from slipping off easily.

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 protrusion being not greater than the maximum height of the protrusion for the medial longitudinal arch of the foot and not greater 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 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.

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 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 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.

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 phalange 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.

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 phalange 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.

As described above, this invention allows young people to develop the habit of walking in a straight line along the running line without putting strain on the knees, ankles, and other parts of the body, and also prevents shoes from slipping off easily.

FIG. 2 is a top view of the baby insole. FIG. 2 is a top view of an insole for toddlers. FIG. 2 is a top view of a pre-junior insole. FIG. 2 is a top view of a junior insole. FIG. 1 is an explanatory diagram (1) of the detailed structure of a baby insole. FIG. 2 is an explanatory diagram (2) of the detailed structure of the baby insole. FIG. 1 is an explanatory diagram (1) of the detailed structure of an insole for toddlers. FIG. 2 is an explanatory diagram (2) of the detailed structure of the toddler insole. FIG. 1 is an explanatory diagram (1) of the detailed structure of a pre-junior insole. FIG. 2 is an explanatory diagram (2) of the detailed structure of a pre-junior insole. FIG. 1 is an explanatory diagram (1) of the detailed structure of a junior insole. FIG. 2 is an explanatory diagram (2) of the detailed structure of a junior insole. 3 is a detailed configuration diagram of a lower layer member and an upper layer member of the present embodiment. FIG. 1 is an explanatory diagram of an example of use of an insole for children according to an embodiment of the present invention. FIG.

The embodiments shown below are merely examples of devices and methods for embodying the technical ideas (structure, arrangement) of the invention, and the technical ideas of the present invention are not limited to those described below. The technical ideas of the present invention can be modified in various ways within the scope of the matters described in the claims.

In particular, it should be noted that the drawings are schematic and may differ from the actual product. Below, we will explain insoles for children for ages 1 to 2 (also called "baby"; may include age 0), ages 3 to 5 (also called "toddler"), ages 6 to 7 (also called "pre-junior"), and ages 8 to 10 (also called "junior").

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

Figure 2 is a top view of the toddler insole for the left foot (hereafter referred to as the toddler left-foot insole 200). However, this is a view from above with the left foot placed on it, and shows that the toddler flexion-inducing grooves Rb, which will be described later, are engraved on the underside.

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.

At birth, i.e., between 0 and 2 years of age, not all bones are present as shown in Figure 1, but between 3 and 5 years of age, they grow as shown in Figure 2, between 6 and 7 years of age, they grow as shown in Figure 3, and between 8 and 10 years of age, they grow as shown in Figure 4, and the number of bones is roughly the same as in an adult.

However, these bones are immature, and a characteristic of bone growth is that, for example, in the growth of long bones (long, slender, 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 this 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.

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.

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.

Simply imitating the shape of foot insoles, which are medical devices used in foot insoles for adults, miniaturizing them, and manufacturing and selling them for children without any consideration of human development or anatomy is extremely dangerous to the healthy development of children's feet.

The reason why a steep arch structure like that of an adult shoe is not necessary is that the tissues in an adult's foot that support the foot skeleton, such as muscles and ligaments, are fully developed, and so basically there is no need for support or correction from an insole on the sole of the foot. However, in order to cope with standing or walking for long periods of time, or with 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.

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, but children's feet have a thick fat layer on the sole that acts to some extent as an arch cushion and compensates for the muscles and ligaments that hold the foot skeleton in place.

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

On the other hand, when you think about when you reach adolescence, it is important to develop the habit of being able to step straight in relation to the running line.

In consideration of the above-mentioned human development, anatomical knowledge about stability in running, and the need to develop the habit of walking in a straight line relative to the running line, we will provide footwear insoles that are suited to the developmental stages of children's feet, and footwear that uses such insoles. The following describes the characteristics of the children's insoles shown in Figures 1 to 4 that correspond to each developmental stage of the foot.

(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. The bones 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 epiphyses of each bone have 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.

In addition, the ball of the foot, which is the connection between the first proximal phalange 43 and the first metatarsal 17, and the ball of the little toe, which is the connection between the fifth metatarsal 25 and the fifth proximal phalange 51, are not clearly visible (the heads are not enlarged). For this reason, in this embodiment, they are referred to as the baby provisional ball of the foot Ba and the baby provisional ball of the little toe SA.

Such an insole (also called an inner sole) 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 portion CAa for the baby's transverse arch and a convex portion CAb for the baby's inner longitudinal arch. There is no convex portion for the outer longitudinal arch, but it may be included.

The back surface is also formed with a baby bend induction groove portion Ra, which will be described later. In addition, a baby insole corner portion 100A is formed. As shown in FIG. 1, this baby insole corner portion 100A is made up of a baby insole inner corner portion 100b, a baby insole heel corner 100c, and a baby insole outer corner portion 100a.

The height of the rear end 100B of the baby insole heel corner 100c described above is very low (the surrounding area 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 convex portion 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).

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 provisional little toe 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.

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 its maximum height near the apex of the baby's transverse arch protrusion portion CAa, and reaches the rear end of the baby insole 100B.

The baby bend 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 toe ball SA and the center of the baby's provisional thenar ball Ba.

This baby flexion 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.

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 taken along A5-A5 (La line) of FIG. 5(a).

Figure 6 is a cross-sectional view of the baby insole 100. Figure 6(a) is the A1-A1 cross section of Figure 5(a), and Figure 6(b) is the A2-A2 cross section of Figure 5(a). Figure 6(c) is the A3-A3 cross section of Figure 5(a), and Figure 6(d) is the A4-A4 cross section of Figure 5(a). Figure 6(e) is a view from the Fa direction of Figure 5(a).

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

This baby lower 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.

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

As shown in FIG. 5(a), the baby lower layer 110 (thickness: about 1 mm) and the baby upper layer 120 (thickness: about 2 mm in the area corresponding to the front feet) are provided with a baby flexion induction groove section Ra. Details of this baby flexion induction groove section Ra will be described later, but it is made up of a "diagonal cut-out section" with 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 120.

As shown in FIG. 5(b), the baby insole inner corner portion 100b gradually rises from the vicinity of the baby flexion induction 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)).

In Fig. 5(b), the surface line (dotted line) of the baby lower layer member 110 in the A5-A5(La) cross section in Fig. 5(a) is indicated as "Lad." Also, the surface of the baby insole outer corner portion 100a seen in the A5-A5(La) cross section in Fig. 5(a) is indicated by a double dotted 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 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).

The height of the rear end 100B of the baby insole 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 the baby lower layer member 110 is embedded in the baby upper layer member 120. However, while Figure 5(b) shows the baby lower layer member 110 from the back side with diagonal lines, not all of the diagonal lines are the baby lower layer member 110. In reality, it is between lines Lm1 and Lk1. Details will be explained in Figure 13 below.

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 in the range 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. 5B, the range in which the height drops sharply toward 100B is indicated as Lah (5 mm to 10 mm: preferably 8 mm).

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 is da2 (5.0 to 5.5 mm: preferably 5.36 mm) 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.

As shown in FIG. 6(c), the A3-A3 cross section in FIG. 6(a) has a height da3 (3.1 to 3.5 mm: preferably 3.28 mm). As shown in FIG. 6(c), the A3-A3 cross section is the area corresponding to the heel, and since it is thin in height (thickness), the baby lateral arch protrusion CAa is visible.

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 the area corresponding to the heel, where the baby insole heel corner 100c begins to be formed, so it is slightly higher than the A3-A3 cross section.

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 (3.9-4.3 mm: preferably 4.16 mm) of the A4-A4 cross section, the height is ha4 (3.8-4.8 mm: preferably 4.5 mm), 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.

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 lateral arch convex portion CAa is low in height and does not affect the skeletal development of the infant. Furthermore, the baby flexion induction groove portion Ra is formed, so the infant can walk straight without affecting the skeletal development.

(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.

As shown in FIG. 2, the foot skeleton for a toddler is made up 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 2 1, 4th metatarsal 23, 5th metatarsal 25, 1st cuneiform 9, cuboid 15, talus 3, and calcaneus 1. The bone ends of the bones that make up the forefoot 71 and midfoot 73 are visible, the head 77b of the 2nd metatarsal 19, the head 77c of the 3rd metatarsal 21, the head 77d of the 4th metatarsal 23, and the head 77e of the 5th metatarsal 25 are visible, and the 2nd cuneiform, 3rd cuneiform, and navicular bones are not visible.

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 become larger).
In order to distinguish from the insole for babies described above, in this embodiment, they are called the toddler's temporary ball of the foot Bb and the toddler's temporary ball of the foot SB. Such insoles used for toddler feet are called toddler insoles 200.

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.

The toddler insole has a flexion-inducing groove Rb on the back surface, which will be described later. In addition, the toddler insole corner 200A is formed. As shown in FIG. 2, the toddler insole corner 200A is made up of a toddler insole inner corner 200b, a toddler insole heel corner 200c, and a toddler insole outer corner 200a.

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

In FIG. 2, the insole is shown as a forefoot corresponding region 71A and a midfoot corresponding region 73A.
Additionally, outer corner portion 200a of the toddler insole 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 rear foot placing area 75A, and then reaches rear end 200B of the toddler insole.

Furthermore, the toddler insole inner corner portion 200b gradually increases in height from the vicinity of the toddler's pseudoballoon Bb, reaches its maximum height near the apex of the toddler's lateral arch protrusion portion CBa, and reaches the toddler insole rear end 200B.

The toddler flexion induction groove portion Rb is a straight line (called the toddler insole heel center line LBa) that passes through the toddler insole rear end 200B and the toddler insole heel center Pb and reaches the 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.

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 induction 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.

Next, the detailed structure of the toddler insole will be described with reference to Figures 7 and 8. However, the description of the same reference numerals as those 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 (Lb line) of FIG. 7(a).

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

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.

The upper layer 220 and the toddler lower layer 210 are bonded together by heat compression, so that the surface (front side) of the toddler lower layer 210 that comes into contact with the toddler upper layer 220 (the thickness of the area corresponding to the forefoot is approximately 2.3 mm) sticks to the bottom surface (back side) of the toddler lower layer 210, and if the shoes become too small due to growth, the toddler lower layer 210 can be peeled off.

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

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

In addition, in Figure 7(b), the surface line (dotted line) of the toddler lower layer member 210 in the B5-B5(Lb) cross section in Figure 7(a) is written as "Lbd." Also, the surface of the toddler insole outer corner portion 200a seen in the B5-B5(Lb) cross section in Figure 7(a) is shown by a 20-dotted line.

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

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 layer component 210 is embedded in toddler upper layer component 220. However, although Figure 7(b) shows toddler lower layer component 210 from the backside with diagonal lines, not all of this diagonal line is toddler lower layer component 210. In reality, it is between lines Lm2 and Lk2. Details will be explained in Figure 13 below.

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 in the range 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. 7B, the portion where the height suddenly drops toward 200B is similar to Lah (5 mm to 10 mm: preferably 8 mm) in FIG. 5B.

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. 8B, 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. 7A.

As shown in FIG. 8(c), the height is db3 (4.1 to 4.6 mm: preferably 4.52 mm) 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 protrusion CBa is visible.

As shown in FIG. 8(d), the height of the B4-B4 cross section in FIG. 7(a) is db4 (4.8 to 5.3 mm: preferably 5.17 mm). The B4-B4 cross section is slightly higher than the B3-B3 cross section.

Figure 8(e) is a side view of toddler insole heel corner 200c seen from the Fc direction in Figure 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 will be in close contact with the rear upper.

Therefore, the foot will not slip forward, and since the heel (rear foot) is surrounded by toddler insole inner corner 200b and toddler insole outer corner 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, so the toddler can walk straight.

(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, and 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, 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 formed 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.

Therefore, as shown in Figure 3, all of the bones that make up the foot have appeared, and this state will be the basis for growth. From this stage, 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 in the developing stage 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.

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 taking on 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, the lateral longitudinal arch requires a function that prevents the foot from falling outward due to pressure from the lateral longitudinal arch portion, which is required for maintaining the bone alignment, since the cuboid bone 15 that constitutes it is growing. Therefore, 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.

The heel, i.e., calcaneus 1, which is important when standing and walking, is considerably developed but is still unstable and does not provide sufficient support for the entire foot, so it is necessary to support the calcaneus 1 vertically by the corners and to support the rear foot 75.
In addition, 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 the pre-junior thenar eminence Bc and the pre-junior hypothenar eminence SC.

Such an insole (also called a midsole) on which a pre-junior's foot can be placed is shown in Figure 3. The pre-junior insole 300 shown in Figure 3 forms a convex portion CCa for the pre-junior's transverse arch, a convex portion CCb for the pre-junior's medial longitudinal arch, and a convex portion CCc for the pre-junior's lateral longitudinal arch.

Also, a pre-junior flexion induction groove portion Rc, which will be described later, is formed on the back surface. 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.

The height of the outer corner portion 300a of the pre-junior insole at the rear end 300B of the pre-junior insole 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 pre-junior insole heel center Pc) on which the rear foot 75 is placed and below the apex of the pre-junior transverse arch convex portion 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.

Additionally, the pre-junior insole outer corner portion 300a gradually increases in height from the vicinity of the pre-junior little toe SC, reaches a maximum height around the leading edge of the rear foot placing area portion 75A, and reaches the 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.

Also, the pre-junior flexion induction groove portion Rc describes a straight line (called a pre-junior insole heel center line LCa) that passes through the pre-junior insole rear end 300B and the pre-junior insole heel center Pc to the 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) relative to a straight line LCb passing through the center of the pre-junior little finger ball SC and the center of the pre-junior big toe ball BC.

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

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).

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

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

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

As shown in Figure 9(a), the pre-junior lower layer member 310 is formed with a pre-junior flexion induction groove portion Rc. Details of this pre-junior flexion induction groove portion Rc will be described later, but the pre-junior lower layer member 310 (thickness is about 1mm to 2mm: preferably 1.5mm) is provided with a "diagonal cut portion" with a width of 3.5mm to 4mm (preferably about 3.2mm) and a length of 35mm to 43mm (preferably 40mm), and the pre-junior upper layer member 320 is provided with an upper layer side induction groove [(depth is 0.8mm to 1.0mm (preferably about 0.8mm), width is 0.7mm to 1.2mm (preferably about 0.8mm), length is about 30mm to 40mm (preferably about 38mm)).

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 induction groove portion Rc, and reaches a height of 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 transverse arch convex portion CCa.

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 insole for pre-junior seen in the C5-C5(Lc) cross section in Fig. 9(a) is indicated by a double dotted line.

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

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 the pre-junior lower layer member 310 is embedded in the pre-junior upper layer member 320. However, although Figure 9(b) shows the pre-junior lower layer member 310 from the back side with diagonal lines, not all of the diagonal lines are the pre-junior lower layer member 310. In reality, it is between lines Lm3 and Lk5. Details will be explained in Figure 13 below.

That is, as shown in FIG. 9(b), when viewed from the inside of the foot, the pre-junior lower layer member 310 is not visible between Lm3 and Lk5 because it is embedded in the pre-junior upper layer member 320. For this reason, in FIG. 9(b), the 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 the pre-junior upper layer member 320.

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

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

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

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

In other words, when the pre-junior insole 300 is placed in a pre-junior shoe (not shown) and the foot is put on, the heel is in close contact with the rear upper. This prevents the foot from slipping 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 it does not slip sideways.

The transverse arch convex portion CCa for pre-juniors is only slightly higher than that for toddlers, so it does not affect the skeletal development of the pre-juniors. Furthermore, the pre-junior flexion-inducing groove portion Rc is formed, so the child can walk in a straight line.

(Junior)
As shown in FIG. 4, the foot of a junior basically has the same foot skeleton as that of an adult, 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, 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 epiphyseal portion 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.

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 middle sole) 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.

The back surface is also formed with a baby flexion induction groove portion Rd, which will be described later. In addition, a junior insole corner portion 400A is formed. As shown in FIG. 4, this junior insole corner portion 400A is made up of a junior insole inner corner portion 400b, a junior insole heel corner 400c, and a junior insole outer corner portion 400a.

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

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 ball SD, reaches a maximum height around the leading edge of the rear foot placing area 75A, and reaches the junior insole rear end 400B.

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 (referred to as 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.

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 bend 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).

Specifically, one end Rda of the junior flexion induction 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.

11(a) is a back view of the 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 taken along D5-D5 (Ld line) of FIG. 11(a).
Figure 12 is a cross-sectional view of a cut piece of junior insole 400. Figure 12(a) is a cross-section taken along D1-D1 in Figure 11(a), and Figure 12(b) is a cross-section 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 direction Fd in Fig. 11(a).

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

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

As shown in FIG. 11(a), a junior flexion induction groove portion Rd is formed in the junior lower layer member 410 (thickness 1 mm to 2 mm: preferably 1.5 mm) and the junior upper layer member 420 (thickness of the forefoot corresponding area 3 mm). The details of this junior flexion induction groove portion Rd will be described later, but it consists of a "diagonal cut portion" with 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 side induction 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 40 mm to 43 mm (preferably about 41 mm)] provided in the junior upper layer member 420.

As shown in FIG. 11(b), the junior insole inner corner portion 400b gradually rises from the vicinity of the junior flexion induction 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 junior insole outer corner portion 400a seen in the D5-D5(Ld) cross section in Fig. 11(a) is indicated by a double dotted line.

As shown in FIG. 11(c), the height of the forefoot corresponding area is hd1 (2.5-3.3 mm: preferably 3.0 mm), the height of the apex of the junior transverse arch convex portion CCa is hd2 (7.0-8.0 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-3.6 mm (preferably 3.46 mm).

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 backside with diagonal lines, not all of these diagonal lines are junior lower layer component 410. In reality, it is between lines Lm5 and Lk7. Details will be explained in Figure 13 below.

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 in the range 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.

11B, 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), the height is dd1 (3.8 to 4.5 mm: preferably 4.01 mm) in the D1-D1 cross section of Fig. 11(a).
As shown in FIG. 12B, 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. 11A.

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 area corresponding to the heel, and since it is thin in height (thickness), the junior transverse arch convex portion CCa is visible.

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 the area corresponding to the heel where the junior insole heel corner 400c begins to be formed, so it is slightly higher than the D3-D3 cross section.

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

In other words, when the junior insole 400 is placed in a baby shoe (not shown) and the junior puts his or her foot in it, the heel is in close contact with the rear upper. This prevents the foot from slipping forward, and the heel (rear foot) is surrounded by the junior insole inner corner 400b and the junior insole outer corner 400a, so it does not slip sideways.

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

(Detailed explanation of lower and upper layer members)
Fig. 13 is a detailed structural 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 cross section taken along line mm in FIG. 13(b).

As shown in FIG. 13(a), the junior lower layer member 410 has a "diagonal cut" portion Rd1 formed therein for forming the junior flexion induction groove portion Rd. 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).

On the other hand, as shown in FIG. 13(b), a diagonal groove Rd2 is formed on the back of the junior upper layer member 420 to form the junior flexion induction groove portion Rd. 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).

In addition, a substantially U-shaped wall 420L is formed on the back 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.
Therefore, when the junior lower layer member 410 is fitted into the approximately U-shaped wall 420L of the junior upper layer member 420 and heat-pressed, they are integrated together as shown in FIG. 13(c).

(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. Therefore, it is safe. Furthermore, the heel bone is almost wrapped by the corners (inner and outer), making it even safer.

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.

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 direction of knee movement are approximately parallel, so the user can push off without putting strain on the knees, ankles, and other parts of the body, and can walk without losing posture.

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 or natural leather, and the lower layer may be an elastic body (sponge, elastomer) or cork.

Most commercially available children's footwear sizes are in 1 cm increments, so if it were possible to fine-tune intermediate sizes in 0.5 cm increments, such as 16.5 cm between 16 cm and 17 cm, children could use shoes, for example, as footwear that better fits their growing feet.

In other words, if used for children's footwear, when the child grows and the shoes become too tight, the lower layer, which acts as a size adjustment sheet, can be peeled off to allow fine adjustments, for example in 0.5 cm increments.

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.

1 Calcaneus 3 Talus 7 Navicular 15 Cuboid 17 First metatarsal
19 2nd metatarsal 21 3rd metatarsal 23 4th metatarsal 25 5th metatarsal 27 5th metatarsal base
29 1st metatarsal bone head 31 2nd metatarsal bone head 33 3rd metatarsal bone head 35 4th metatarsal bone head 37 5th metatarsal bone head 71 forefoot 73 midfoot 75 hindfoot
100 Baby insoles 200 Toddler insoles 300 Pre-junior insoles 400 Junior insoles

Claims (6)

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 protrusion being not greater than the maximum height of the protrusion for the medial longitudinal arch of the foot and not greater 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 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 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. 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. 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 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. 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 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. 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 insole for children according to claim 1, which is removable . 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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