JP7226807B2 - inner sole - Google Patents

Description

The present invention relates to an inner sole worn as an insole for shoes.

2. Description of the Related Art Conventionally, as an inner sole (also referred to as a sole plate or a corrective insole) fitted inside a shoe, one having a special height at the center of the arch of the foot is well known. For example, in the technique of Patent Document 1, by providing a convex portion that supports the cuboid (arch) from the bottom of the foot, the anterior portion of the calcaneus is supported, and the entire tarsal bone including the calcaneus is stabilized in a natural state. I am trying to

Patent No. 5498631

Many conventional inner soles only vaguely support the arch of the sole of the foot. However, there is no insole shape specialized for suppressing movement (sway) in which the center of gravity of the body excessively swings outward during sports in general or walking.

The present invention has been made in view of the circumstances described above, and an object thereof is to provide an inner sole for suppressing excessive lateral displacement (lateral movement) of the center of gravity of the body from the soles of the feet.

In order to solve the above-mentioned problems, the present invention provides a method for adjusting an inner sole used as an insole for shoes and for intentionally guiding the COP so that the COP does not displace excessively outward during sports, comprising : The inner sole is divided into three regions, a forefoot portion, a middle foot portion, and a rearfoot portion, on a sole having a certain thickness that is shaped according to the internal shape of the shoe. Outer forefoot protrusion projecting upward from the upper surface of the inner sole or downward from the lower surface of the inner sole on the outer side of the area of any one of the foot and the rear foot or a combination of two or more , a lateral metatarsal protrusion, and a lateral hindfoot protrusion , wherein the protrusion height of the lateral forefoot protrusion, the lateral metatarsal protrusion, and the lateral hindfoot protrusion is 0.2 mm or more. , within the range of 15 mm or less, according to the user's physical condition, the lateral forefoot protrusion, the lateral metatarsal protrusion, and the lateral hindfoot protrusion are adhered to or scraped from the sole to provide an optimum height. It is characterized by being adjusted to each dimension.

Further, the height of the lateral forefoot protrusion is in the range of 1.5 mm to 7 mm, the height of the lateral metatarsal protrusion is in the range of 0.2 mm to 10 mm, and the height of the lateral hind foot protrusion is in the range of 1.5 mm to 10 mm. can be adjusted with .

In addition, the lateral forefoot protrusion extends from the vicinity of the bottom of the fifth and fourth metatarsal bones on the lateral side of the sole of the human foot to the vicinity of the fifth and fourth metatarsophalangeal joints. Only the area near the toes is pushed upward, and the lateral metatarsal protrusion is directly below the cuboid or slightly distal to the cuboid and is pushed upward above the arch height of the medial border of the navicular bone, The lateral hindfoot projection is adjusted so that the lateral side of the calcaneus is pushed up higher than the medial side of the calcaneus.

The inner sole according to the present invention includes any one of the forefoot portion, the middle foot portion, and the rearfoot portion, or any two of the three regions, or the outer side of all the three regions. In the part, a convex part with a height of 0.2 mm or more and 15 mm or less is projected upward from the upper surface of the inner sole or downward from the lower surface, so that the outer part of the sole of the user is projected upward. Being pushed up makes it difficult for the COP to shift outward, and at the same time guides it inward (toe side). Since the movement trajectory of the COP has a characteristic that reflects the movement trajectory of the body's center of gravity (located near the pelvis when a person is standing), the movement trajectory of the body's center of gravity can be corrected by intentionally guiding the movement trajectory of the COP. This makes it possible to induce efficient movement that suppresses excessive lateral displacement of the body's center of gravity.

FIG. 4 is a schematic diagram explaining a body center of gravity and a floor reaction force; FIG. 4 is a schematic diagram showing movement trajectories of the COP and the center of gravity of the body; BRIEF DESCRIPTION OF THE DRAWINGS It is a single figure of the inner sole which concerns on embodiment of this invention, Comprising: (A) is a top view, (B) is a right side view of (A). 4 is a cross-sectional view taken along the line XX of FIG. 3; FIG. 1 is a plan view of a human foot bone; FIG. It is a modification of this invention, Comprising: (A) is a top view of an inner sole, (B) is a right side view of (A). It is a modification of this invention, Comprising: It is a top view of an inner sole.

All movements that a person performs on a daily basis are movements that control the body's center of gravity 26 . A COP (Center of Pressure) is biomechanically important for controlling the body center of gravity 26 . First, the COP will be briefly explained.

As shown in FIG. 1, a force W1 acting from a person's center of gravity 26 in the direction of gravity is transmitted to the foot 25 via the simulated hip joint 22, the simulated knee joint 23, and the simulated ankle joint 24, and from the foot 25 to the floor. works. On the other hand, the entire sole of the foot 25 receives a reaction force from the floor (hereinafter referred to as floor reaction force W2).

The COP is the average point of the force distribution acting on the entire contact surface between the sole of the foot 25 and the floor, and the COP is widely used in scientific calculations as the starting point of the floor reaction force W2. The magnitude and direction of the floor reaction force W2 generated from this COP physically determines the motion of each joint of the whole body, including the motion of the center of gravity of the body. An ideal locus of movement of the COP during walking is indicated by a line Y drawn on the legs LF and LR in FIG. By optimizing the movement trajectory Y of the COP, which differs between individuals, it is physically possible not only to improve walking and reduce pain, but also to improve sports performance.

The movement trajectory Y of the COP has the characteristic of affecting the movement trajectory Z of the body center of gravity 26 . That is, a change in the movement trajectory Y of the COP causes a change in the movement trajectory Z of the center of gravity 26 of the body. Excessive lateral displacement (Sway) of the body center of gravity 26 is often taken as synonymous with excessive lateral displacement of the COP that affects it.

By using this physical characteristic and intentionally manipulating the COP of the foot 25 with the inner sole 30, excessive lateral displacement of the body's center of gravity 26 can be suppressed.

FIG. 3 shows an inner sole 30 according to an embodiment of the present invention, where (A) is a plan view and (B) is a right side view of (A). 4 is a cross-sectional view taken along the line XX of FIG. 3(A). Further, FIG. 5 is a plan view of the foot bone.

Note that the inner sole 30 shown in FIG. 3 is for the right foot, and the inner sole 30 for the left foot has a symmetrical configuration. Therefore, in the following description, the inner sole 30 for the right foot will be described, and the description for the left foot will be omitted. In a rigorous comparison, depending on the user, the shape of the left foot and the right foot may be asymmetrical. However, assuming that this is within the range of individual differences, the explanation will proceed assuming that the left and right feet are symmetrical.
In addition, the term "inner sole" as used in the present invention includes those that are separately attached by the user to the finished shoe, as well as those that are sewn into the shoe in advance during the manufacturing process of the shoe.

As shown in FIG. 3A, the inner sole 30 is formed in a shape close to the outer shape (insole shape) that matches the inside of the shoe, and is divided into six regions by region lines L1, L2, and L3 in top view. divided into The area lines L1, L2, L3 and the division of areas A to E are determined based on the structure of the human foot bone 1, as shown in FIG.

A human foot bone 1 can be divided into three regions A, B, and C in the front-rear direction. Specifically, in the forefoot A (5th metatarsal 18, 5th phalanx 19, 4th metatarsal 20, 4th phalanx (phalanx is a generic term for proximal phalanx, middle phalanx, and unphalanx) composed: distal to Lisfranc joint), metatarsal B (composed of cuneiform bones 11, 12, 13, cuboid 14, scaphoid 15: between Chopard and Lisfranc joints), posterior A foot portion C (consisting of the calcaneus 17 and the talus 16: proximal to the Chopard joint). Area lines L1 and L2 are lines that roughly divide these areas A, B, and C. FIG.

In addition, one region line L3 is drawn approximately perpendicular to the paper surface of FIG. ).
The positions of the area lines L1 to L3 shown in FIG. 5 correspond to the positions of the area lines L1 to L3 shown in FIG. 3(A).

The inner sole 30 is shaped according to the internal shape of the shoe and includes a sole 31 having a certain thickness, a lateral forefoot protrusion 32 and a lateral metatarsal protrusion 33 projecting upward from an upper surface 31b of the sole 31. , and lateral hindfoot projections 34 .

These lateral forefoot protrusions 32, lateral metatarsal protrusions 33, and lateral hindfoot protrusions 34 are integrally formed with the sole 31, and the height and shape of the protrusions 32, 33, and 34 can be adjusted by cutting the protrusions 32, 33, and 34. can be changed. The projections 32, 33, and 34 may be formed separately from the bottom lining 31, and may be attached to the bottom lining 31 or scraped to change the height and shape as appropriate.

As shown in FIG. 3(A), the outer forefoot projection 32 extends along the outer edge 31a of the sole 31 from slightly outside the intersection of the upper edge of the sole 31 and the area line L3. It is formed in such a manner that it extends continuously to the edge, and the width gradually widens.

The shape of the outer forefoot convex portion 32 described above is an example, and may be changed in various ways according to the user's physical condition. For example, in FIG. 3(A), the outer forefoot protrusion 32 and the outer edge 31a of the sole 31 are not spaced (gap), but there is no gap between the outer forefoot protrusion 32 and the outer edge 31a. may be formed with a space between them. In FIG. 3A, the lateral forefoot protrusion 32 is formed integrally and continuously in the front-rear direction. You may comprise the convex part equivalent to .

In addition, the lateral metatarsal projection 33 is integrally continuous from the area around the area line L1 to the area around the area line L2 toward the inside (toward the area line L3) with a gap from the outside edge 31a of the sole 31. extended.

Similarly, the shape of the lateral metatarsal projection 33 may also be changed variously according to the physical condition of the user. For example, in FIG. 3A, the lateral metatarsal projection 33 extends inward, but it may extend back and forth perpendicular to the paper surface. Also, as with the lateral forefoot protrusion 32 , a plurality of protrusions may constitute a group of masses, and this group of masses may constitute a protrusion equivalent to the lateral forefoot protrusion 33 .

Further, the lateral hindfoot convex portion 34 extends rearward from the vicinity of the region line L2 with a gap from the outer edge portion 31a of the sole 31, and is aligned with the shape of the rear end portion of the sole 31 to the inner side. It is formed continuously and integrally in a curved manner (toward the area line L3).

As for the shape of the lateral hindfoot portion 34, for example, in FIG. 3A, the lateral hindfoot convex portion 34 is formed integrally and continuously in the front-rear direction, but a group of projections constitutes a group. However, this group of lumps may constitute a convex portion equivalent to the outer front/rear foot convex portion 34 .

Thus, the shape of each of the protrusions 32, 33, and 34 in top view is an example, and varies depending on the purpose of use such as the shape of the shoe to be used, the user's foot shape, and the type of sport. However, in any case, it is formed within the range of the outer portion E of the bottom lining 31 .

Height from the upper surface 31b of the sole 31 (a surface on the front side of the paper surface in FIG. 3A and a base point defining the height of each of the protrusions 32, 33, and 34) to the outer forefoot protrusion 32 T1 is formed in the range of 0.2 mm or more and 15 mm or less. Since this height dimension also varies depending on the physical condition of the user and the purpose of use, the allowable range is set within a range of several millimeters.

The reason why the height T1 is set to 0.2 mm or more is that it is medically known that the sole of the human foot is generally a site with extremely excellent discrimination ability that can recognize a difference in height from 0.2 mm. there is The sole of the foot constantly exchanges information on the shape of the ground and the COP position with the cerebrum, and changes in the recognizable shape of the sole of the foot simultaneously change the COP position and COP movement speed, which in turn changes the movement of the body's center of gravity. It is possible as described above. In this way, 0.2 mm seems to be a slight height in daily life, but it is medically and physically significant from the viewpoint of changes from the soles of the feet to the whole body. It is defined as 0.2 mm or more. In particular, it is preferable to select the height from 0.2 mm when it is necessary to consider delicate changes in sensation, such as top athletes.

Also, at a height of 0.6 mm, the change in the motion of the center of gravity of the body becomes more pronounced. When the height is 1 mm or more, the rate at which the user can subjectively perceive the change in movement increases. Even if the change in motion cannot be perceived subjectively, it is a general phenomenon that the change in motion occurs objectively.

The reason why the height T1 is set to 15 mm or less is that the skeleton of the human foot is known to fit within a certain range even though there are variations. . Therefore, when setting the upper limit of the height of the convex portion, it is necessary to determine it in consideration of the human skeleton and its variation. In the present invention, based on data collected independently from over 2,500 cases, we concluded that the maximum T1 height that can be used for the sole of the foot is 15 mm.

Also, if the height T1 is too high, a load may be applied to the knee joints and the soles of the feet due to long-term use. Approximately 15% of users complained of discomfort within one week of use when using a T1 greater than 15 mm. Therefore, by setting T1 to 11 mm or less, complaints of discomfort during the same period decreased to about 4%. Therefore, it is more preferable to set the height T1 to 11 mm or less in order to reduce the occurrence rate of discomfort to 5% or less.

Furthermore, since the complaints of discomfort decreased to 1% or less by setting the height T1 to 7 mm or less, it can be said that the height T1 is 7 mm or less at which it is possible to suppress complaints of discomfort and at the same time maintain the effect. . Which height of 15 mm or less is selected is determined in consideration of the user's physical condition, type of footwear, and the like.

In addition, for the same reason as for the lateral forefoot protrusion 32, the heights T2 and T3 of the lateral metatarsal protrusion 33 and the lateral hindfoot protrusion 34 are also in the range of 0.2 mm or more and 15 mm or less, preferably 0.2 mm. It is formed in the range of 0.2 mm to 7 mm, more preferably 0.2 mm to 7 mm.

The lateral forefoot protrusion 32 begins near the bottom (base) of the fifth and fourth metatarsal bones 18 and 20 on the lateral side (little toe side) of the human sole, and near the fifth and fourth metatarsophalangeal joints. (near the ball of the little toe), and functions to push up the area up to the vicinity of the fifth and fourth toes 19 and 21 in accordance with the height of the convex portion 32 upward or obliquely inward.
In addition, the lateral metatarsal protrusion 33 is located directly below the cuboid bone 14, slightly distal to the cuboid bone 14 (near the base of the third and fourth metatarsals), or directly below the cuneiform joint (between the lateral cuneiform bone and the cuboid bone). It functions to push the articular surface of the navicular bone upward or obliquely upward and medially above the arch height of the medial margin of the navicular bone.
Furthermore, the lateral hindfoot projection 34 functions to push the lateral side of the calcaneus 17 higher than the medial side of the calcaneus 17 upward or obliquely upward and medially.

That is, each of these convex portions 32, 33, and 34 lifts the outer side of the arch higher than the inner side of the arch structure of the foot formed by the forefoot portion A, the middle foot portion B, and the rear foot portion C, respectively. It acts to prevent the COP indicated by 2 from excessively outwardly displacing. As a result, by correcting the body center of gravity 26 so that it does not move excessively outward, the movement of the body center of gravity 26 can be intentionally optimized, leading to efficient movement.

The heights T1, T2 and T3 of the projections 32, 33 and 34 may be the same or different depending on the foot shape of the user. For example, in general human feet, it is preferable to raise the forefoot part A by 1.5 mm to 7 mm, the middle foot part B by 0.1 mm to 10 mm, and the rear foot part C by 1.5 mm to 10 mm. It is obtained by Since the relationship between a person's COP and the body center of gravity 26 varies from person to person, these heights T1, T2, and T3 are adjusted according to each user.

On the other hand, the cross-sectional shape of each projection 32, 33, 34 in the XX direction in FIG. It is formed in a shape that draws a gradually gentle curved surface toward the inner obliquely lower side as it goes inward from the vertex of 34 . Note that this shape is intended to fit the user's foot, and is not an essential shape to prevent the COP from excessively moving outward.

For example, as shown in FIG. 4B, it can be formed in a substantially circular arc shape without corners, or as shown in FIG. It may be. Furthermore, as shown in FIG. 4(D), the effect of the present invention can be obtained even if the outer upper portion is formed into a rectangular shape. That is, the shape can be determined in consideration of ease of manufacture (processing), manufacturing cost, and the like.

FIG. 4 is a cross-sectional view of the lateral forefoot protrusion 32 taken along line XX, and is not a cross-sectional view of the lateral metatarsal protrusion 33 and the lateral rearfoot protrusion 34. The foot protrusion 34 can also be formed in a similar shape. The positional relationship between the outer edge 31a and the projections 33, 34, and 35 in the medial-lateral direction may be formed so that there is no interval (gap) as shown in FIG. 4(B) and as shown in FIG. 4(C), they may be formed to be separated (spaced).

According to the inner sole 30 according to the embodiment of the present invention, the upper surface 31b of the inner sole 30 is divided into three regions of the forefoot portion A, the middle foot portion B, and the rear foot portion C, and the front foot portion A, the middle foot portion A lateral forefoot protrusion 32 and a lateral metatarsal protrusion having a height of 0.2 mm or more and 15 mm or less from the upper surface 31b of the inner sole 30 are provided on all the lateral portions E of the three regions of the foot portion B and the hindfoot portion C. The provision of the portion 33 and the lateral rear leg convex portion 34 mainly has the following three effects.

(1) Effect of Suppressing Outer Displacement of COP For example, in the case of golf, if the outer displacement of the COP occurs during the swing, it becomes difficult to convert the translational force generated during the swing into rotational force. Suppression and reduction increase rotational force and improve performance.

In the case of running, if the final point of the COP trajectory Y in the foot is between the big toe and the toe, a strong kick in the direction of movement is possible. The inside, etc.) is the final point, not only can you not make an ideal start, but it often leads to injury. The present invention can prevent this.

In the case of soccer, since it is a sport that often switches between left and right, excessive lateral displacement of the COP immediately causes a sprain, which not only reduces performance but also threatens the life of the player. The present invention can prevent this.

In the case of walking, the final point of the COP trajectory Y is ideally between the big toe and the toe, as in running, but the forward propulsion at lower speeds is lower than in running, so excessive lateral displacement of the COP is possible. is likely to occur. In addition, since it is an action performed every day, even a slight burden on joints accumulates and develops into serious arthritis in many cases, but the present invention can prevent this.

(2) Physical effect (edge effect)
Since the lateral portion E is designed to be higher than the medial portion D, the user can easily obtain the power to quickly turn inward using the edge of the lateral portion of the shoe. As a result, in sports such as soccer where there are many switchings, the instantaneousness is improved, and in golf, the edge effect appropriately guides the movement of the foot and realizes a stable swing centered on rotational movement (with suppressed sway).

(3) Effect of activating foot function Today, there are a large proportion of people whose little toes do not touch the ground. By raising the outer forefoot part A by 15 mm at the maximum, the grounding property of the four toes and the small toes is improved, and the outer part E can be stepped on further. Furthermore, the activity is improved by pressing the flexor digitorum brevis and abductor digitorum brevis. This also activates the little toes in terms of muscle activity. As a result of these two points, the functionality of the lateral portion E of the foot is improved, and it becomes possible to induce efficient movement while suppressing excessive lateral displacement of the body center of gravity 26 during walking.

In addition, the lateral metatarsal region B is an important region where the peroneus longus muscle is a pulley and changes direction. Compression of this part increases the activity of the peroneus longus muscle in addition to the above muscles. The peroneus longus muscle is known as a muscle that is active when the ball of the big toe is pressed against the ground, and is a very important muscle in various sports and exercises such as walking. In addition, the peroneal muscle is the only muscle among the muscles originating in the lower leg that can move the COP to the inside of the foot (toe side), so it is necessary for ideal COP control and body center of gravity control. can be said to be essential. Therefore, the activation of this muscle improves the stepping force on the medial part D (the big toe side) of the foot, thereby suppressing excessive lateral displacement of the COP. It is possible to induce efficient movement with suppressed lateral displacement.

In addition, the height of the lateral forefoot protrusion 32, the lateral metatarsal protrusion 33, and the lateral hindfoot protrusion 34 is set to 0.2 mm or more and 11 mm or less, or 0.2 mm or more and 7 mm or less. At heights 33 and 34, the probability that the user complains of discomfort can be reduced.

Although the inner sole 30 according to the embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and various modifications and changes are possible based on the technical concept of the present invention. be.

For example, in the present embodiment, the three convex portions of the lateral forefoot convex portion 32, the lateral metatarsal convex portion 33, and the lateral hindfoot convex portion 34 are respectively formed. Alternatively, even if two of the three are provided in combination, the effect of suppressing excessive outward movement of the COP can be obtained. Examples of combinations include the combination of the lateral forefoot convex portion 32 and the lateral hindfoot convex portion 34, the combination of the lateral forefoot convex portion 32 and the lateral metatarsal convex portion 33, and the like. These three projections are provided for the common purpose of suppressing excessive lateral displacement of the COP, but each projection has a different effect on the body. The lateral forefoot convex portion 32 guides the direction of kicking of the toes to be appropriately turned inward. The lateral metatarsal protrusion 33 appropriately guides the COP position in the medial direction when a load is applied to the entire sole. The lateral hindfoot projection 34 guides the direction of movement of the COP not excessively outward when the heel touches the ground. The present invention is a shape that is adjusted to obtain an optimum effect for each individual by individually or in combination of the respective actions produced by these three projections. The provision of all of the three projections 32, 33, and 34 is the shape that is most effective in suppressing excessive outward displacement of the COP.

Further, in the present embodiment, the three convex portions 32, 33, and 34 are provided in an independent manner,
The metatarsal bone 18, the cuboid bone 14, and the like are individually pushed up, but as shown in FIG. good. According to this configuration, complicated molding and processing of the inner sole 40 are reduced, and productivity can be further improved.

Even in the case of the integrated convex portion 42, the heights T1, T2, and T3 of the forefoot portion A, middle foot portion B, and rearfoot portion C are 0.2 mm or more, and The best inner sole 40 can be provided to the user by adjusting the height to the optimum.

Furthermore, in addition to the present embodiment, as shown in FIG. 7, a medial forefoot convexity that protrudes upward from the upper surface 31b on the medial edge 31c of the sole 31 in the region of the medial side D of the forefoot A. A portion (second convex portion) 51 may be provided. Further, as in the modified example described above, the inner forefoot convex portion 51 may be provided on the insole 40 provided with each convex portion alone, or two of the three in combination. Further, as shown in FIG. 6 described above, even when the integrated convex portion 42 is provided, the inner forefoot convex portion 51 may be provided on the inner edge portion 41c. The height of the inner forefoot projection 51 is also set to 0.2 mm or more and 15 mm or less, preferably 0.2 mm or more and 11 mm or less, more preferably 0.2 mm or more and 7 mm or less.

The inner forefoot projection 51 is formed to extend from the front tip of the sole 31 to the region line L1 along the inner edge 31c. Also, the cross-sectional shape of the inner forefoot projection 51 is the same as the shape shown in FIG. The inner forefoot projection 51 does not have the function of lifting the human foot bone upward, but is intended to improve the kicking force of the big toe by fixing the big toe at a predetermined position so that it does not shift. That is, the three protrusions 32, 33, and 34 perform passive control to prevent the COP from moving outward, and the medial forefoot protrusion 51 regulates the position of the medial side D of the forefoot portion A to allow the kicking of the big toe. By combining active control that improves force, the effect of suppressing excessive outward displacement of the COP can be further enhanced.

On the other hand, in the present embodiment, the three protrusions 32, 33, and 34 project upward from the top surface 31b of the bottom lining 31, but the bottom surface 31d of the bottom lining 31 (on the far side of the paper surface in FIG. 3A) The three protrusions 32, 33, and 34 may protrude downward from the surface that serves as a base point for defining the height of each protrusion when protruding downward. Similarly to the present embodiment, the height of these three protrusions to the lower side is 0.2 mm or more and 15 mm or less, preferably 0.2 mm or more and 11 mm or less, more preferably 0.2 mm or more and 7 mm or less. to That is, any configuration may be used as long as the bones such as the metatarsal bone 18 can be lifted upward by the function of the three protrusions 32 , 33 , and 34 . Note that the inner forefoot convex portion 51 described above may also protrude downward from the lower surface 41d.

1 foot bone 11, 12, 13 cuneiform bone 14 cuboid bone 15 scaphoid bone 16 talus bone 17 calcaneus bone 18 fifth metatarsal bone 19 fifth toe bone 20 fourth metatarsal bone 21 fourth toe bone 22 simulated hip joint 23 simulated knee joint 24 Simulated ankle joint 25 Foot 26 Body center of gravity 30, 40, 50 Inner sole 31, 41 Insole 31a Outer edge 31b Upper surface 31c, 41c Inner edge 31d, 41d Lower surface 32 Outer forefoot protrusion (protrusion)
33 lateral metatarsal convexity (convexity)
34 Lateral Hind Foot Convex (Convex)
42 integrated convex portion 51 medial forefoot convex portion (second convex portion)
A Forefoot B Middle foot C Rear foot D Medial part E Lateral part L1, L2, L3 Area line LF Left foot RF Right foot T1, T2, T3 Height dimension W1 Load W2 Ground reaction force Y COP movement trajectory Z Body center of gravity trajectory of

Claims (3)

A method for adjusting an inner sole used as an insole of a shoe to intentionally guide the COP so that the COP does not displace excessively outward during sports, comprising :
The inner sole is divided into three regions, a forefoot portion, a middle foot portion, and a rearfoot portion, on a sole having a certain thickness that is shaped according to the internal shape of the shoe. Outer forefoot protrusion projecting upward from the upper surface of the inner sole or downward from the lower surface of the inner sole on the outer side of the area of any one of the foot and the rear foot or a combination of two or more , a lateral metatarsal protrusion, and a lateral hindfoot protrusion ,
The lateral forefoot protrusion, the lateral metatarsal protrusion, and the lateral hindfoot protrusion are adjusted to a height of 0.2 mm or more and 15 mm or less according to the user's physical condition. A method for adjusting an inner sole, wherein the inner sole is adjusted to an optimum height dimension by adhering or scraping the portion, the lateral metatarsal protrusion, and the lateral hindfoot protrusion to the sole . The height of the lateral forefoot protrusion is adjusted within the range of 1.5 mm to 7 mm, the height of the lateral metatarsal protrusion is adjusted within the range of 0.2 mm to 10 mm, and the height of the lateral hind leg protrusion is adjusted within the range of 1.5 mm to 10 mm. 2. The method for adjusting an inner sole according to claim 1, wherein the inner sole is adjusted. The lateral forefoot protrusion extends from near the bottom of the fifth and fourth metatarsal bones on the lateral side of the sole of the human foot to near the fifth and fourth metatarsophalangeal joints and near the fifth and fourth toes. The lateral metatarsal protrusion pushes up directly below the cuboid bone or slightly distal to the cuboid bone higher than the arch height of the medial edge of the navicular bone, and the lateral posterior 3. The method of adjusting an inner sole according to claim 1, wherein the foot protrusion is adjusted to push up the outer side of the calcaneus higher than the inner side of the calcaneus.
adjustment method.

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