Footwear insoles and footwear

Abstract

First, it aims to support the medial arch, improve cushioning of the arch of the foot, and reduce impact on the foot; second, it aims to support the lateral arch, improving the symptom of floating toes, in which weight does not rest on the toes, thereby correcting poor walking posture. [Solution] The footwear insole 11 has an insole body 110 formed to fit the shape of the midsole of the footwear, a first convex portion 12 provided at a position corresponding to the point P1 where the bottom of the fifth metatarsal bone and the cuboid bone intersect in the Lisfranc joint, a second convex portion 13 provided at a position corresponding to the point P2 where the medial cuneiform bone and the navicular bone intersect, and a third convex portion 14 provided at a position corresponding to the point P3 between the upper part of the shaft of the second metatarsal bone and the upper part of the shaft of the third metatarsal bone, and the first convex portion 12 is formed to be the tallest.

Description

[Technical Field]

[0001] The present invention relates to insoles and footwear. [Background technology]

[0002] There are several causes of back and knee pain, one of which may be twisted toes. Because the little toe tends to twist outward, the ankle joint is anatomically prone to turning outward (inversion), and the human body places strain on the little toe side (outside). Meanwhile, the muscles on the sole of the foot are connected to the muscles attached to the head, so if the sole of the foot is not properly grounded, simply standing will place some strain on the muscles from the sole of the foot to the head. Conversely, correcting the sole of the foot will reduce strain on the body. In the days when tabi socks, zori sandals, and geta were the mainstream footwear, force was more likely to be applied to the big toe, so as mentioned above, there was less tendency for the foot to turn inwards. However, in modern times when shoes are the norm, the tendency for the foot to turn inwards has become stronger, and combined with a decrease in muscle strength, the fifth metatarsal bone is now under the greatest stress. In this way, the instability of the foot's contact with the ground due to an increased tendency for inversion and weakened trunk muscles can lead to growing pains and cartilage damage in children, and in adults can be a breeding ground for diseases such as osteoarthritis, herniated discs, and spinal stenosis.

[0003] Meanwhile, the soles of the feet contain sensory receptors called mechanoreceptors. As shown in Figure 10, mechanoreceptors are concentrated in areas S1, S2, and S3. The first area is the contact points of the five toes, particularly the big toe contact area S1. The second area is the contact area S2 in the midfoot (the area with the transverse arch) between the base of the toes and the arch. The third area is the contact area S3 in the heel, where weight is likely to be placed. These contact areas receive physical external stimuli (sensations) transmitted from the ground, and these sensations are transmitted to the brain as information about body posture and movement (somatosensation) and information about movement (proprioception). The brain adjusts body posture and controls body movement during exercise based on the information transmitted from the mechanoreceptors on the soles of the feet.

[0004] However, in modern times, due to various reasons such as changes in lifestyle and the use of ill-fitting footwear, mechanoreceptors often do not function normally due to collapse of the transverse arch and floating toes caused by collapse of the transverse arch, which is said to be one of the causes of the diseases mentioned above. Attempts are being made to improve these diseases and problems by reviewing them from the perspective of footwear. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 6601892 [Patent Document 2] Japanese Patent Application Laid-Open No. 2013-150797 Summary of the Invention [Problem to be solved by the invention]

[0006] Patent Document 1 discloses an insole and footwear with multiple protrusions for the purpose of improving stability in standing posture. One of its features is that the protrusions supporting the medial arch are taller than any other protrusions. However, based on the applicant's experience in providing treatment over the past 20 years, as mentioned above, modern people tend to have a lateral center of gravity (tendency toward inversion) in which the center of gravity is biased to the outside of the foot due to muscle weakness. Therefore, a structure that makes the medial arch the highest further exacerbates this tendency toward a lateral center of gravity, resulting in an unstable standing posture.

[0007] Patent Document 2 discloses an insole with multiple protrusions to allow for moderate movement and stable balance. These protrusions are located on the first metatarsal sesamoid, the fifth metatarsal tuberosity, and the calcaneal eminence. However, this structure does not include any protrusions to support the medial arch and transverse arch. Therefore, the following two issues remain with this insole. Furthermore, the protrusions are located in areas such as the heel where mechanoreceptors are concentrated, which can impair mechanoreceptor function. The first problem is that the lack of support for the medial arch means that the cushioning of the arch of the foot cannot be improved, and shock to the foot cannot be alleviated. The second problem is that the lack of support for the transverse arch means that the symptom of floating toes, in which weight is not placed on the toes, cannot be improved, making walking posture more likely to be disrupted. The present invention has been made to solve the above problems. [Means for solving the problem]

[0008] The present invention, which solves the above-mentioned problems, has the following configuration. The footwear insole of the present invention comprises: An insole to be attached to footwear, A plate-shaped body, When worn on the foot, it is positioned at the point where the bottom of the fifth metatarsal bone and the cuboid bone meet in the Lisfranc joint of the sole of the foot. Place a first protrusion having an apex portion, The first convex portion is provided at a position outside the ground contact area of ​​the big toe, the ground contact area of ​​the midfoot between the base of the toes and the arch, and the ground contact area of ​​the heel. According to such a footwear insole of the present invention, the first convex portion pushes up from below the area where the bottom of the fifth metatarsal bone and the cuboid bone of the Lisfranc joint intersect.

[0009] The footwear insole of the present invention further comprises: When worn on the foot, The location where the medial cuneiform and navicular bones intersect A second vertex having a vertex in the vicinity of having a convex portion, The second protrusion is provided at a position outside the ground contact area of ​​the big toe, the ground contact area of ​​the midfoot between the base of the toes and the arch, and the ground contact area of ​​the heel, The height of the apex of the first protrusion is higher than the height of the apex of the second protrusion. According to the insole for footwear of the present invention, the area where the medial cuneiform bone and the navicular bone intersect is pushed up from below. This pushes up from below the area where the base of the fifth metatarsal and the cuboid bone meet at the Lisfranc joint on the outside of the foot, placing weight on the medial arch and creating a comfortable posture.

[0010] The insole for footwear of the present invention further has a structure in which, when worn on the foot, a portion of the sole of the foot corresponds to a region between an upper portion of the shaft of the second metatarsal bone and an upper portion of the shaft of the third metatarsal bone. A third having a vertex According to the insole for footwear of the present invention, the area between the upper part of the shaft of the second metatarsal bone and the upper part of the shaft of the third metatarsal bone is pushed up from below.

[0013] The footwear insole of the present invention is characterized in that the main body is made of a compressible and deformable material, The aforementioned 1st The convex portion is made of a material that has a smaller amount of compressive deformation than the portion other than the convex portion, When compression pressure is applied by the wearer's weight, The firstThe insole body of the present invention is configured to deform in accordance with the shape of the sole of the foot, thereby improving the function of supporting the foot from below.

[0015] The footwear of the present invention comprises: When wearing footwear, the insole facing the sole of the foot is When worn on the foot, it is placed at the point where the bottom of the fifth metatarsal bone and the cuboid bone meet in the Lisfranc joint of the sole of the foot. A first one having a vertex A protrusion is provided. The first convex portion is provided at a position outside the ground contact area of ​​the big toe, the ground contact area of ​​the midfoot between the base of the toes and the arch, and the ground contact area of ​​the heel. According to the footwear of the present invention, the convex portion pushes up from below the area where the bottom of the fifth metatarsal bone and the cuboid bone intersect in the Lisfranc joint. This pushes up from below the area where the base of the fifth metatarsal and the cuboid bone meet at the Lisfranc joint on the outside of the foot, placing weight on the medial arch and creating a comfortable posture.

[0016] The footwear of the present invention comprises: Furthermore, When worn on the foot, The location where the medial cuneiform and navicular bones intersect A second vertex having a vertex in the vicinity of Convex part and The second protrusion is provided at a position outside the ground contact area of ​​the big toe, the ground contact area of ​​the midfoot between the base of the toes and the arch, and the ground contact area of ​​the heel, The height of the apex of the first protrusion is higher than the height of the apex of the second protrusion. According to the footwear of the present invention, the area where the medial cuneiform bone and the navicular bone intersect is pushed up from below. This pushes up from below the area where the base of the fifth metatarsal and the cuboid bone meet at the Lisfranc joint on the outside of the foot, placing weight on the medial arch and creating a comfortable posture.

[0017] The footwear of the present invention comprises: Furthermore, at a position corresponding to the area between the upper part of the shaft of the second metatarsal bone and the upper part of the shaft of the third metatarsal bone A third having a vertex According to the footwear of the present invention, the area between the upper part of the shaft of the second metatarsal bone and the upper part of the shaft of the third metatarsal bone is pushed up from below.

[0019] The footwear of the present invention comprises: In the midsole member constituting the midsole, the midsole member is made of a compressible material, The aforementioned 1st The convex part is The first It is made of a material that has a smaller amount of compressive deformation than the rest of the convex portion. When compression pressure is applied by the wearer's weight, The first The portions other than the convex portions are compressed and deformed, thereby forming relatively convex portions. According to the footwear of the present invention, the main body deforms in accordance with the shape of the sole of the foot, thereby improving the function of supporting the foot from below. [Effects of the Invention]

[0021] The footwear insole and footwear of the present invention provide the following effects. (1) By placing weight on the medial arch, tilting the center of gravity forward, and placing weight on each toe, muscle tension and stress on the joints are reduced, and trunk stability is improved. (2) Corrects the medial arch caused by decreased muscle strength and function, improving cushioning of the arch of the foot. (3) It corrects floating toes caused by the collapse of the transverse arch, improving standing posture. [Brief explanation of the drawings]

[0022] [Figure 1] 1 is an overall perspective view of an insole according to the present invention. [Figure 2] 1 is a plan view of an insole of the present invention. FIG. [Figure 3] This is a plan view of the bones of the right foot seen from directly above. [Figure 4] This is a plan view of the bones of the right foot seen from directly above. [Figure 5] FIG. 1 is a left side view of an insole according to the present invention. [Figure 6] FIG. 2 is a right side view of the insole of the present invention. [Figure 7] FIG. 5 is a cross-sectional view of a modified insole of the present invention taken along the line AA in FIG. 4. [Figure 8] FIG. 5 is a cross-sectional view taken along the line BB in FIG. 4 of a modified example of the insole of the present invention. [Figure 9] 1 is a perspective view of the entire and partial footwear of the present invention; [Figure 10] FIG. 1 is a bottom view of the foot showing the location of mechanoreceptors on the sole of the foot. DETAILED DESCRIPTION OF THE INVENTION

[0023] The footwear insole of the present invention will be described in detail below. The footwear insole 11 of the present invention is used by being placed on the midsole of shoes such as athletic shoes, sneakers, basketball shoes, soccer shoes, and other specialized athletic shoes, as well as leather shoes. It may also be used by being placed on the midsole of footwear that covers only part of the instep, rather than the entire instep, such as sandals or slippers. As shown in FIGS. 1 and 2 , footwear insole 11 includes a main body 110 and first, second, and third protrusions 12, 13, and 14 provided on main body 110. Thin, plate-like main body 110 is shaped to fit the shape of the insole of the footwear to be worn, forming an elliptical shape defined by a curve that follows the contours of the sole of the foot. Main body 110 is made of a flexible material so that it can deform to follow the curved deformation of the sole of the shoe as the wearer walks. Examples of materials include, but are not limited to, polyurethane foam, low-resilience foam, rubber such as natural rubber or synthetic rubber, silicone rubber, sponge-like plastic, and gel materials. Other materials include elastic metals. Furthermore, in order to fix the position of the protrusions within the insole of the shoe (described later), the material is preferably flexible but has a certain degree of hardness that prevents deformation in directions parallel to the surface. Furthermore, the upper surface of main body 110 is preferably slippery (having a small coefficient of friction with the sole of the foot) to facilitate the actions of putting on and taking off shoes.

[0024] The upper surface of the main body 110 has three protrusions 12, 13, and 14 protruding from the surface of the main body 110. These protrusions 12, 13, and 14 are provided at positions corresponding to predetermined parts of the foot. The positions of the protrusions 12, 13, and 14 will be described below. FIGS. 3 and 4 are plan views showing the bones and joints that make up the foot. As shown in FIG. 3, in the foot structure, the fifth metatarsal 45, cuboid 53, medial cuneiform 52, navicular 51, second metatarsal 42, and third metatarsal 43 are functionally linked around the Lisfranc joint 1 (tarsometatarsal joint). The cuboid 53 forms the center of the lateral longitudinal arch and forms joints with the calcaneus 54 at the rear and with the fourth metatarsal 44 and fifth metatarsal 45 at the front. The medial cuneiform 52 is connected to the first metatarsal 41, the intermediate cuneiform 56 is connected to the second metatarsal 42, and the lateral cuneiform 55 is connected to the third metatarsal 43, and these three cuneiforms 52, 55, 56 and the cuboid 53 form the base that supports the metatarsal group.

[0025] The Lisfranc joint 1 is a complex joint consisting of four joint groups: the medial cuneiform 52, first metatarsal 41, intermediate cuneiform 56, second metatarsal 42, lateral cuneiform 55, third metatarsal 43, cuboid 53, fourth metatarsal 44, and fifth metatarsal 45. In particular, the second metatarsal 42 has a special structure that fits closely into the concave surface of the intermediate cuneiform 56, enhancing the stability of the joint. The navicular 51, as the key part of the medial longitudinal arch, contacts the talus 57 anteriorly and, together with the cuboid 53, forms the transverse tarsal joint (Chopard's joint), mediating the kinetic chain between the hindfoot and forefoot.

[0026] 4, the first projection 12 is provided at a position corresponding to a region P1 where the bottom of the fifth metatarsal 45 of the Lisfranc joint 1 intersects with the cuboid 53 when the foot is placed on the insole 11 of the present invention. Similarly, the second projection 13 is provided at a position corresponding to a region P2 where the medial cuneiform 52 intersects with the navicular 51. Similarly, the third projection 13 is provided at a position corresponding to a region P3 between the upper portion of the shaft of the second metatarsal 42 and the upper portion of the shaft of the third metatarsal 43.

[0027] As shown in FIGS. 1, 5, and 6, each of the protrusions 12, 13, and 14 is formed in a mountain-like shape with a slope that slopes gently downward from each of the apexes 12a, 13a, and 14a. The positions of the apexes 12a, 13a, and 14a correspond to the positions of the aforementioned sole portions P1, P2, and P3. The material constituting each of the protrusions 12, 13, and 14 may be the same as the material constituting the main body 110, but is preferably a material that is relatively harder than the material constituting the main body 110. For example, the material may be the same as the material constituting the main body 110, but may be formed to be harder during the manufacturing process. Furthermore, a material that can bend and deform in response to the bending and deformation of the sole is preferable, but a harder material may also be used. Examples of the material include, but are not limited to, polyvinyl chloride, acrylic resin, polystyrene, polycarbonate, ABS resin, phenolic resin, and epoxy resin. The material that constitutes each of the protrusions 12, 13, 14 must be hard enough that it will not deform or will only deform slightly when compressive pressure is applied by the weight of the foot from the sole.

[0028] The first protrusion 12 has a side portion 121 formed in a shape that follows the outer contour of the main body 110, and a protrusion 122 that curves inward and protrudes, with the apex portion 12a being located at a position overlapping the side portion 121. When the shoe is worn on the foot, the apex portion 12a is located near a position corresponding to a part P1 where the base of the fifth metatarsal bone and the cuboid bone intersect in the Lisfranc joint of the sole of the foot. The first protrusion 12 is configured in a mountain shape with a base that widens out from the apex portion 12a.

[0029] The second protrusion 13 has a side surface 131 formed in a shape that follows the inner contour of the main body 110, and a protrusion 132 that curves inward and protrudes, with the apex 13a located at a position overlapping the side surface 131. The apex 13a is located near a position that corresponds to a region P2 between the upper part of the shaft of the second metatarsal bone and the upper part of the shaft of the third metatarsal bone on the sole of the foot when the shoe is worn on the foot. The first protrusion 13 is configured in a mountain shape with a base that widens out from the apex 13a.

[0030] Apex portions 12a, 13a do not have to be provided on each side portion 121, 131, and may be provided within a range of a radius of about 2 to 6 mm from apex portions 12a, 13a shown in Fig. 2. Third convex portion 14 is configured in a mountain shape with an elliptical base that widens from apex portion 14a at the center, on the toe side of main body 110, from a position corresponding to the metatarsal head to a position toward the heel, with apex portion 14a located near a position corresponding to region P3 between second metatarsal 42 and third metatarsal 43, and contour 141 is an elliptical shape that is long in the heel-to-toe direction.

[0031] 2, the insole 11 may be configured such that portions of the main body 110 corresponding to the protrusions 12, 13, and 14 are cut out and the protrusions 12, 13, and 14 are fitted into the cutout portions to form an integrated structure, or such that no cutouts are provided and the protrusions 12, 13, and 14 are attached from above to the corresponding positions of the main body 110. Also, the main body 110 and the protrusions 12, 13, and 14 may be configured as an integrated structure using the same material. Note that the protrusions 12, 13, and 14 may be attached to the underside of the main body 110 instead of the upper side. In this configuration, when the foot is placed on the insole 11 and downward pressure is applied, the main body 110 is curved and deformed, causing the protrusions 12, 13, and 14 to protrude relatively.

[0032] In the above-described configuration, the first protrusion 12 and the second protrusion 13 hold the front side of the heel of the foot from the medial and lateral sides, and the third protrusion 14 supports the area of ​​the sole between the metatarsal head and the ball of the foot. This configuration not only supports the sole more stably, but also, as shown in FIG. 5, by making the height h1 of the first protrusion 12 located on the lateral side higher than the height h2 of the second protrusion 14 and the height h3 of the third protrusion 14 (h1>h2, h1>h3), the sole can be supported with an inward tilt. As a result, inversion can be corrected, and the center of gravity of the foot can be properly positioned.

[0033] That is, the first convex portion 12 tilts the sole of the foot inward, correcting the center of gravity to a proper position, but the provision of the second convex portion 13 ensures that the sole of the foot is held securely, thereby more reliably correcting the center of gravity. Furthermore, the provision of the third convex portion 14 holds the sole of the foot at three points, so that the corrective action can be more reliably exerted.

[0034] The following embodiment of the footwear insole 11 of the present invention will be described. As shown in FIG. 2, the distance L0 between the line 16 that contacts the toe and the line 15 that contacts the heel is the overall length of the main body 110. If the overall length L0 is 26 cm, the thickness of the main body 110 is approximately 1 to 3 mm. The distance between the lines 15 and 17 is L0 / 5, and the distance between the lines 18 and 16 is L0 / 3. The intersections 19 and 20 between the outline of the inner protrusion 122 of the first protrusion 12 and the outline of the main body 110 and the intersections 21 and 22 between the outline of the inner protrusion 132 of the second protrusion 13 and the outline of the main body 110 are arranged so that the intersections 19 and 21 are located on the line 17. Height h1 from the bottom surface of main body 110 to vertex 12a is 6 to 11 mm, height h2 from the bottom surface of main body 110 to vertex 13a is 3 to 7 mm, and height h3 from the bottom surface of main body 110 to vertex 14a is 4 to 8 mm. In addition, the distance between intersections 19 and 20 is about 7 cm, and the distance between intersections 21 and 22 is about 6 cm. The width of first protrusion 12 is about 2.5 cm, and the width of second protrusion 13 is about 2 cm.

[0035] The third protrusion 14 is positioned so that the apex 14a is located at the center of the intersections 23, 24 between the straight line 18 and the outline of the main body 110. The height of the apex 14a is 4 to 8 mm. As mentioned above, the third protrusion 14 is elliptical, with the long axis length being 6 cm and the short axis length being 4 cm. Preferably, the position of apex 12a is such that distance L1 from the heel is approximately 32 to 39% of the total length L0 of main body 110, and distance W1 from the outer end is approximately 0 to 13% of the foot width at the apex position. Preferably, the position of apex 13a is such that distance L2 from the heel is approximately 30 to 36% of the total length L0 of main body 110, and distance W2 from the inner end is approximately 0 to 7%. Preferably, the position of apex 14a is such that distance L3 from the heel is approximately 62 to 69% of the total length L0 of main body 110, and distance W3 from the outer end is 45 to 55%.

[0036] As another configuration example, as shown in Figures 7 and 8, the main body 110A of the footwear insole 11A can be configured to have the same thickness as the vertices 12aA, 13aA, 14aA of the first convex portion 12A, the second convex portion 13A, and the third convex portion 14A, respectively, and the first convex portion 12A, the second convex portion 13A, and the third convex portion 14A can be embedded within the main body 110A. Furthermore, by constructing the main body 110A from a material 31 that is sufficiently soft compared to the materials that make up the first convex portion 12A, the second convex portion 13A, and the third convex portion 14A, when the footwear insole 11 of the present invention is attached to the foot and a load is applied to the insole 11 in the compression direction, only the main body 110A deforms in the compression direction and deforms into a thin plate-like shape, as shown by imaginary line 32, and the first convex portion 12A, the second convex portion 13A, and the third convex portion 14A protrude relatively.

[0037] Next, footwear Sh shown in FIG. 9 will be described. The insole 11 described above is used by attaching it to the midsole of the footwear as an insole, but it can also be configured so that a first convex portion 12B, a second convex portion 13B, and a third convex portion 14B are provided on the upper surface of a sole body 110B that forms the bottom of the footwear Sh. These convex portions 12B, 13B, and 14B may be formed integrally with the sole body 110B, or may be formed separately and fixed to the upper surface of the midsole. An outsole 111B of the same shape is attached to the underside of the sole body 110B.

[0038] An upper Up is provided on the upper side of the sole, which is composed of the sole body 110B and the outsole 111B, and a foot receiving section Sg into which the foot is inserted is formed inside. The footwear Sh is worn on the foot by inserting the foot into the receiving section Sg through the opening Sj. The shape of the upper Up is not limited to the shape shown in FIG. 9, and may be an instep band used in sandals or the like. The positions, heights, materials, etc. of the first convex portion 12B and apex portion 12aB, the second convex portion 13B and apex portion 13aB, and the third convex portion 14B and apex portion 14aB are the same as those of the footwear insole 11, and therefore will not be described here. When applied to footwear, the footwear is manufactured so that the surface that comes into contact with the sole of the foot has 12 to 14 convex portions.

[0039] The effects of the insole 11 and the footwear Sh of the present invention described above will now be described. As already explained, the sole of the foot contains sensory receptors called mechanoreceptors. As shown in Figure 10, the mechanoreceptors are concentrated in areas S1, S2, and S3. For the mechanoreceptors in these three regions S1, S2, and S3 to function normally, regions S1, S2, and S3 must be in contact with the ground and transmit accurate sensations to the brain. In the footwear insole 11 and footwear Sh of the present invention, the first convex portion 12 corresponding to region P1 and the second convex portion 13 corresponding to region P2 are located outside the regions S1, S2, and S3 where mechanoreceptors are concentrated. Therefore, these convex portions 12 and 13 do not interfere with the function of the mechanoreceptors. Furthermore, the third convex portion 14 corresponding to region P3 is located in the center of region S2 where mechanoreceptors are concentrated. The third convex portion 14 pushes up the center of the transverse arch, correcting the transverse arch to its proper state and correcting floating toe. As a result, the function of the mechanoreceptors in region S1 is restored.

[0040] The above-described footwear insole 11 and footwear Sh can be customized to fit the shape of the wearer's foot by examining the shape of the wearer's foot in advance. In this case, the first convex portion 12, the second convex portion 13, and the third convex portion 14 can be prepared separately and directly fixed to the insole or the midsole of the shoe at a position corresponding to a portion P1 where the bottom of the fifth metatarsal and the cuboid bone intersect in the Lisfranc joint, a portion P2 where the medial cuneiform and the navicular bone intersect, and a portion P3 between the upper part of the shaft of the second metatarsal and the upper part of the shaft of the third metatarsal. The main body 110 of the footwear insole 11 does not need to have a shape that matches the shape of the midsole of the shoe, but only needs to function as a base material to which the first convex portion 12, the second convex portion 13, and the third convex portion 14 are fixed. In this case, the main body 110 is fixed by adhesive or the like to a position within the midsole where the first convex portion 12, the second convex portion 13, and the third convex portion 14 can exert their appropriate functions. This specification discloses the following configuration. Other forms of footwear insoles include: An insole to be attached to footwear, A plate-shaped body, When worn on the foot, the insole has a convex portion provided at a position corresponding to the intersection of the sole of the fifth metatarsal and the cuboid bone in the Lisfranc joint of the sole of the foot. With this footwear insole, the convex portion presses up from below the intersection of the sole of the fifth metatarsal and the cuboid bone in the Lisfranc joint. The footwear insole further has a protrusion at a position corresponding to the intersection of the medial cuneiform bone and the navicular bone. This footwear insole pushes up the intersection of the medial cuneiform bone and the navicular bone from below. The footwear insole further has a protrusion at a position corresponding to the area between the upper part of the shaft of the second metatarsal bone and the upper part of the shaft of the third metatarsal bone. This footwear insole pushes up the area between the upper part of the shaft of the second metatarsal bone and the upper part of the shaft of the third metatarsal bone from below. In the above-mentioned footwear insole, a convex portion provided at a position corresponding to the intersection of the sole of the fifth metatarsal and the cuboid bone in the Lisfranc joint is the highest compared to other convex portions. This footwear insole pushes up from below the area where the sole of the fifth metatarsal and the cuboid bone in the Lisfranc joint, located on the lateral side of the foot, and allows weight to be placed on the medial arch, resulting in a comfortable posture. The convex portion of the footwear insole is provided on the upper side. According to this footwear insole, since the convex portion is provided on the upper side, the convex portion can act on the sole of the foot more reliably. The footwear insole has a main body made of a compressible and deformable material, the convex portion is made of a material that has a smaller amount of compressive deformation than a portion other than the convex portion, When compressive pressure is applied by the wearer's weight, the areas other than the convex portions are compressed and deformed, forming relatively convex portions. With this type of footwear insole, the main body deforms according to the shape of the sole of the foot, improving the effect of supporting the foot from below. The footwear insole is A plate-shaped body, The insole has a first convex portion located 32-39 percent of the total length of the foot from the heel end and 0-13 percent of the foot width from the outer end, a second convex portion located 30-36 percent of the total length of the foot from the heel end and 0-13 percent of the foot width from the outer end, and a third convex portion located 62-69 percent of the total length of the foot from the heel end and 48-53 percent of the foot width from the outer end. This footwear insole has three convex portions that press up the sole of the foot, providing stable support for the sole and correcting the tendency for the center of gravity to shift to the outside of the foot. Other forms of footwear include: When the footwear is worn, the midsole that faces the sole of the foot has a convex portion at a position corresponding to the intersection of the sole of the fifth metatarsal and the cuboid bone in the Lisfranc joint of the sole of the foot. With such footwear, the convex portion pushes up from below the intersection of the sole of the fifth metatarsal and the cuboid bone in the Lisfranc joint. The above footwear is Furthermore, a protrusion is provided at a position corresponding to the intersection of the medial cuneiform bone and the navicular bone. According to this type of footwear, the intersection of the medial cuneiform bone and the navicular bone is pushed up from below. The above footwear is Furthermore, a protrusion is provided at a position corresponding to the area between the upper part of the shaft of the second metatarsal bone and the upper part of the shaft of the third metatarsal bone. With this footwear, the area between the upper part of the shaft of the second metatarsal bone and the upper part of the shaft of the third metatarsal bone is pushed up from below. The above footwear is The protrusion located at the position corresponding to the intersection of the sole of the fifth metatarsal and the cuboid bone in the Lisfranc joint is the highest compared to the other protrusions. With this type of footwear, the area where the sole of the fifth metatarsal and the cuboid bone in the Lisfranc joint, located on the outside of the foot, meets is pushed up from below, allowing weight to be placed on the medial arch, resulting in a comfortable posture. The above footwear is In the midsole member constituting the midsole, the midsole member is made of a compressible material, the protrusions are made of a material that has a smaller amount of compressive deformation than portions other than the protrusions, When compressive pressure is applied by the wearer's weight, the areas other than the convex portions are compressed and deformed, forming relatively convex portions. With this type of footwear, the main body deforms according to the shape of the sole of the foot, improving the effect of supporting the foot from below. The above footwear is When wearing footwear, the insole facing the sole of the foot is A first convex portion is provided at a distance of 32 to 39 percent of the total length of the foot from the heel end of the insole and 0 to 13 percent of the foot width from the outer end, a second convex portion is provided at a distance of 30 to 36 percent of the total length of the foot from the heel end and 0 to 13 percent of the foot width from the outer end, and a third convex portion is provided at a distance of 62 to 69 percent of the total length of the foot from the heel end and 48 to 53 percent of the foot width from the outer end. With this type of footwear, the three convex portions push up the sole of the foot, providing stable support for the sole and correcting the tendency for the center of gravity to shift to the outside of the foot (tendency for inversion). [Explanation of symbols]

[0041] 1 Lisfranc joint 11 Footwear insoles 110 Main Unit 12 First protrusion 13 Second protrusion 14 Third protrusion 12a, 13a, 14a apex 41 First metatarsal 42 Second metatarsal 43 Third metatarsal 44 4th metatarsal 45 5th metatarsal 51 Scaphoid bone 52 Medial cuneiform bone 53 cubic bone 54 Calcaneus 55 Lateral cuneiform bone 56 Intermediate cuneiform bone 57 Talus P1: The area where the base of the fifth metatarsal meets the cuboid bone at the Lisfranc joint P2: Intersection of the medial cuneiform and navicular bones P3: The area between the upper part of the shaft of the second metatarsal and the upper part of the shaft of the third metatarsal Sh Footwear Up Upper

Claims

1. An insole to be attached to footwear, A plate-shaped body, a first protrusion having an apex at a position corresponding to the intersection of the bottom of the fifth metatarsal bone and the cuboid bone in the Lisfranc joint of the sole of the foot when the sole is attached to the foot; The first convex portion is provided at a position outside the contact area of ​​the big toe, the contact area of ​​the midfoot between the base of the toes and the arch, and the contact area of ​​the heel.

2. Furthermore, when the support is attached to the foot, the support has a second protrusion having a vertex near a position corresponding to the intersection of the medial cuneiform bone and the navicular bone on the sole of the foot, the second protrusion is provided at a position outside the ground contact area of ​​the big toe, the ground contact area of ​​the midfoot between the base of the toes and the arch, and the ground contact area of ​​the heel; The footwear insole according to claim 1 , wherein the height of the apex of the first convex portion is higher than the height of the apex of the second convex portion.

3. and a third protrusion having an apex near a position corresponding to a region between an upper portion of the shaft of the second metatarsal bone and an upper portion of the shaft of the third metatarsal bone on the sole of the foot when the sole is attached to the foot, The footwear insole according to claim 1 , wherein the height of the apex of the first convex portion is higher than the height of the apex of the third convex portion.

4. the body is made of a compressible material; the first protrusion is made of a material that undergoes a smaller amount of compressive deformation than a portion other than the first protrusion, 2. The footwear insole according to claim 1, wherein when compressive pressure is applied by the weight of the wearer, portions other than the first convex portion are compressed and deformed, thereby forming a relatively convex portion.

5. When wearing footwear, the insole facing the sole of the foot is a first protrusion having an apex at a position corresponding to the intersection of the bottom of the fifth metatarsal bone and the cuboid bone in the Lisfranc joint of the sole of the foot when the sole is attached to the foot; The first protrusion is provided at a position outside the ground contact area of ​​the big toe, the ground contact area of ​​the midfoot between the base of the toes and the arch, and the ground contact area of ​​the heel.

6. Furthermore, when the support is attached to the foot, the support has a second protrusion having a vertex near a position corresponding to the intersection of the medial cuneiform bone and the navicular bone on the sole of the foot, the second protrusion is provided at a position outside the ground contact area of ​​the big toe, the ground contact area of ​​the midfoot between the base of the toes and the arch, and the ground contact area of ​​the heel; Footwear according to claim 5 , wherein the height of the apex of the first convex portion is greater than the height of the apex of the second convex portion.

7. and a third protrusion having an apex near a position corresponding to a region between an upper portion of the shaft of the second metatarsal bone and an upper portion of the shaft of the third metatarsal bone, Footwear according to claim 5 , wherein the height of the apex of the first convex portion is greater than the height of the apex of the third convex portion.

8. Footwear according to claim 5, wherein the midsole member constituting the midsole is made of a compressible material, the first convex portion is made of a material that undergoes a smaller amount of compressive deformation than areas other than the first convex portion, and when compressive pressure is applied by the weight of the wearer, the areas other than the first convex portion are compressively deformed, thereby forming a relatively convex portion.

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