insole

Abstract

To provide an insole that can properly protect the foot of a user particularly as well as the injured foot of a person, by designing the shape of an insole which fits the heel shape of a human foot.SOLUTION: An insole covers an inner bottom part of footwear by coming into contact with the inner bottom part of the footwear and extending from a rear face part situated on a heel side of the footwear to a front face part reaching an intermediate position in a longitudinal direction of the inner bottom part. In addition, the insole includes: a first bottom plate member in which a beam part is provided between the rear face part and the front face part; an intermediate member which is placed just below a near heel grounding point from the rearmost end of a user's heel of the footwear by receding by a prescribed space from an upper part of the bottom plate member and a rear end part of the rear face part toward the intermediate position side in the longitudinal direction of the inner bottom part; and an upper plate member which is placed in an upper part of the intermediate member and covers the intermediate member.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to an insole, and more particularly to an insole that is inserted into various types of footwear to protect the feet of the wearer of the footwear. [Background technology]

[0002] 2. Description of the Related Art In recent years, technology relating to soles that are excellent in functionality for protecting the feet of users has been developed as soles that form the bottom of footwear.

[0003] For example, Patent Document 1 discloses a sole that has a function of protecting the ankles of a user.

[0004] The sole disclosed in Patent Document 1 has a sole structure comprising an outsole, a carbon fiber sheet that is attached to the outsole and includes at least a heel protection film, and an insole that is attached to the carbon fiber sheet. This structure is said to solve the problem of a user's foot stepping on slippery ground or on another person's foot, twisting the ankle and causing movement disorders such as severe sprains, and to provide an ankle protection function.

[0005] In the case of the sole disclosed in Patent Document 1, the insole consists of only a flat one-layer sheet. It is generally known that there are three types of walking and running movements of humans. The first type is performed by landing from the heel (from the heel side to the calcaneus epiphysis) to the toes and then lifting off from the heel to the toes to move the center of gravity. In other words, the heel is the part that first applies foot pressure to the ground when landing and lifting off, and this part needs to be properly protected. The rear end of the human foot is made up of the heel and the muscles around it, and when the rear end of the calcaneus (calcaneus epiphysis) lands, the movement of the center of gravity is braked. The part that comes into contact with the ground is slightly floating. The part that comes into contact with the ground is a part that is a short distance away from the rear end of the foot. For this reason, the insole disclosed in Patent Document 1 has a flat shape and does not fit the shape of the sole of the true landing point near the heel of the human foot, so there is a problem that the foot cannot be properly protected. The second type is to land on the ball of the foot (called the lateral arch side), such as the ball of the big toe, and then push forward using the same part of the foot (the heel) as the first type. The third type is an intermediate type of landing between the first and second types, in other words, the lowest tip of the calcaneus and the lateral arch land almost simultaneously. It is known that these three types are determined by the ethnic culture of each country, as well as the height of the heel and the characteristics of the shoes. The very rear end of the heel is a temporary contact point (landing point). In contrast, the true contact point is the lowest end of the calcaneus (the very rear part of the calcaneus to the lowest end of the calcaneus located on the ankle side from the very rear end). [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2020-505156 A Summary of the Invention [Problem to be solved by the invention]

[0007] Therefore, the present invention has been made in consideration of the above problems, and aims to provide an insole that can adequately protect the user's feet, particularly the feet of people with foot injuries, by designing an insole shape that fits the shape of the sole of the human foot from the heel to the contact point near the heel and around the arch, and smooths and facilitates the movement of the center of gravity when walking or running. [Means for solving the problem]

[0008] In order to solve the above problems, an insole according to one embodiment of the present invention comprises a first bottom plate member that abuts against the inner sole of the footwear and extends from a rear portion located on the heel side of the footwear to a front portion reaching a longitudinal midpoint of the inner sole, covering the inner sole of the footwear, and has a beam portion between the rear portion and the front portion; an intermediate member that is placed above the bottom plate member and spaced a predetermined distance from the rear end of the rear portion toward the longitudinal midpoint of the inner sole, directly below the true ground contact point near the heel of the wearer of the footwear; and an upper plate member that is placed above the intermediate member and covers the intermediate member.

[0009] In the above insole, a second bottom plate member may be provided that extends from a rear portion located on the heel side of the footwear to a front portion extending to a longitudinal midpoint of the inner sole, covering the first bottom plate member, and that has a beam portion between the rear portion and the front portion.

[0010] In the above insole, the first bottom plate member may have three beams, an inner beam, a center beam, and an outer beam, arranged in that order from the inside of the inner sole of the footwear. Also, the second bottom plate member may have three beams, an inner beam, a center beam, and an outer beam, arranged in that order from the inside of the inner sole of the footwear.

[0011] In the insole, holes may be formed between the beams.

[0012] The second base plate member may be narrower and harder than the first base plate member.

[0013] In the above insole, the length of the beam portion in the first base plate member may be 25 / 100 to 35 / 100 of the total length of the base plate member. Also, in the above insole, the maximum width of the beam portion in the first base plate member may be 5 / 100 to 15 / 100 of the total length of the base plate member.

[0014] In the above insole, the intermediate member may be placed on the first base plate member at a distance of 8 / 100 to 10 / 100 of the total length of the first base plate member from the rear end of the first base plate member toward the middle position in the longitudinal direction of the inner sole.

[0015] In the above insole, the front end of the intermediate member may be located near the starting point of the beam portion of the first bottom plate member.

[0016] In the above insole, the intermediate member may have a total length that is 35 / 100 to 45 / 100 of the total length of the first base plate member.

[0017] In the above insole, the overall length of the upper plate member may be shorter than the overall length of the first bottom plate member.

[0018] In the above insole, a first cloth member may be attached to the second bottom plate member, and a second cloth member may be attached to the upper plate member.

[0019] In the above insole, at least the first and second bottom plate members may be formed from different resin materials.

[0020] At least the first bottom plate member and the intermediate member may be made of different resin materials. Effect of the Invention

[0021] The insole of the present invention comprises a first bottom plate member that abuts against the inner sole of the footwear and extends from a rear portion located on the heel side of the footwear to a front portion reaching the longitudinal midpoint of the insole, covering the inner sole of the footwear, and has a beam portion between the rear portion and the front portion; an intermediate member that is placed above the bottom plate member and spaced a predetermined distance from the rear end of the rear portion toward the longitudinal midpoint of the insole, directly below the true ground contact point from the rearmost end of the heel of the wearer of the footwear to the heel; and an upper plate member that is placed above the intermediate member and covers the intermediate member. Therefore, it is possible to design an insole shape that fits the ground contact point from the heel to the heel and the shape of the sole of the foot around the arch of the foot, and that smooths and facilitates the movement of the center of gravity when walking or running, and can properly protect the user's feet, especially the feet of people with foot injuries. [Brief description of the drawings]

[0022] [Figure 1] FIG. 1 is an exploded perspective view showing an insole according to a first embodiment of the present invention. [Diagram 2] 1A is a plan view showing a first bottom plate member of the insole, FIG. 1B is a plan view showing a middle member of the insole, and FIG. 1C is a plan view showing a top plate member of the insole. [Diagram 3] (a) is a plan view showing the first bottom plate member and the second bottom plate member of the insole overlapped together, and (b) is a plan view showing the first bottom plate member, the second bottom plate member and the first cloth member of the insole overlapped together. [Figure 4] 1A is a plan view showing the first bottom plate member, the second bottom plate member, the first cloth member, and the intermediate member of the insole when they are overlapped, and FIG. 1B is a plan view showing the first bottom plate member, the second bottom plate member, the first cloth member, the intermediate member, and the upper plate member of the insole when they are overlapped. [Diagram 5] 1A is an oblique view showing the state in which the first bottom plate member, the second bottom plate member, the first cloth member, and the intermediate member of the insole are overlapped, and FIG. 1B is an oblique view showing the state in which the first bottom plate member, the second bottom plate member, the first cloth member, the intermediate member, and the upper plate member of the insole are overlapped. [Figure 6]13 is a perspective view showing a state in which a first bottom plate member, a second bottom plate member, a first cloth member, an intermediate member, and an upper plate member of the insole are overlapped with a second cloth member overlapped thereon. FIG. [Figure 7] FIG. 1 is an anatomical diagram showing the bones of the human foot and the surrounding muscles. [Figure 8] FIG. 2 is a diagram showing a state in which a human foot is combined with the insole of the present invention. [Figure 9] FIG. 2 is a perspective view showing the insole of the present invention in use. [Figure 10] FIG. 2 is a transparent side view showing the insole of the present invention in use. [Figure 11] FIG. 11 is an exploded perspective view showing an insole according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] The insole of the present invention is inserted into known footwear such as running shoes, walking shoes, baseball shoes, soccer shoes, basketball shoes, tennis shoes, golf shoes, ski and snowboard boots, and other various sports shoes, boots, business shoes, pumps, nurse shoes, sandals, etc., and placed on and abutted against the inner sole (the bottom surface on the inner side of the footwear) of these footwear. The insole prevents the sole of the foot of the wearer of the footwear from directly contacting all or part of the inner sole of the footwear (which may come into contact depending on the purpose). In other words, the insole is a type of member that reduces the impact transmitted from the footwear to the sole of the wearer's foot and suppresses unnecessary braking to help propulsion. It can be used to prevent the ankle from bending inward, which is a drawback of many shoes so far, and the resulting breakdown and stress.

[0024] The insole 1 according to the first embodiment of the present invention will be described with reference to each of the drawings, including FIG. 1. As can be seen from the exploded perspective view of FIG. 1, the insole 1 is provided by stacking a first bottom plate member 21, a second bottom plate member 22, a first cloth member 51, an intermediate member 30, an upper plate member 40, and a second cloth member 52 in order from the side that contacts the inner bottom part 61 of the footwear 60 (see FIG. 9 described later). In the illustrated embodiment, the second cloth member 52 is attached above the upper plate member 40. The first bottom plate member 21 and the second bottom plate member 22 are collectively referred to as the bottom plate member 2. The second bottom plate member 22 may be omitted, and only the first bottom plate member 21 may be provided. Instead of the second bottom plate member 22, a material with a tacky feel such as a non-slip material may be attached under the first bottom plate member 21.

[0025] The first bottom plate member 21 is a member that abuts against the inner sole 61 of the footwear 60. As described above, when a material with a tacky feel, such as a non-slip material, is attached under the first bottom plate member 21, the first bottom plate member 21 does not abut against the inner sole 61 of the footwear 60. Furthermore, as shown in FIG. 2(a), the first bottom plate member 21 extends from the rear surface portion 212 of the first bottom plate member 21 located on the heel portion 62 (see FIG. 9) side of the footwear 60 to the front surface portion 211 that reaches the middle position in the length direction of the inner sole 61 of the footwear 60. Therefore, when the insole 1 is inserted into the footwear 60, approximately half of the inner sole 61 of the footwear 60 is covered. Furthermore, the first bottom plate member 21 is provided with a beam portion 23 between the rear surface portion 212 and the front surface portion 211.

[0026] In the first bottom plate member 21 of the embodiment, three beam portions 23 are formed, and the beam portions 23 are formed in the order of inner beam portion 231, center beam portion 232, and outer beam portion 233 from the inside (arch side) of the inner sole portion 61 of the footwear 60 (see FIG. 2(a)). In the illustrated embodiment, the rear surface portion 212 and the front surface portion 211 of the first bottom plate member 21 are connected. Note that the illustration shows a right foot, and the left foot is symmetrical, so the illustration is omitted. By providing multiple beam portions 23 on the first bottom plate member 21, the impact transmitted from the footwear 60 to the sole of the wearer's foot via the first bottom plate member 21 during walking is reduced.

[0027] As can be seen from the figures, holes 234 are formed between the beams 23. In the embodiment, holes 234 are formed between the inner beam 231 and the central beam 232, and between the central beam 232 and the outer beam 233. In the first bottom plate member 21, when providing strength and weakness in the thickness of the multiple beams 23 (the inner beam 231, the central beam 232, and the outer beam 233) and the portions other than the beams 23, it is preferable to form the holes 234. In addition, since the holes 234 are formed by punching (Thomson processing, etc.) or injection molding, they are excellent in workability and mass productivity. In addition to the embodiment shown in the figures, the position where the beams 23 of the first bottom plate member 21 are formed may be formed on the arch side of the wearer (the navicular bone B2 side in FIG. 6) or the fifth metatarsal B8 side. When the footwear wearer has flat feet, or depending on the size, shape, degree of disability, etc., the formation position of the beam portion 23 of the first sole plate member 21 is adjusted. Regarding the names of the bones of the foot in Fig. 7, B1 is the calcaneus, B2 is the navicular bone, B3 is the cuneiform bone, B4 is the first metatarsal, B5 is the second metatarsal, B6 is the third metatarsal, B7 is the fourth metatarsal, and B8 is the fifth metatarsal.

[0028] The role of the beam portion 23 of the first bottom plate member 21 is roughly as follows. When a wearer of the footwear walks, the footwear lands on the ground from the heel, and the landing part moves in an arc shape from the calcaneus B1 to the navicular bone B2 and then to the fifth metatarsal B8 side in FIG. 7. At this time, the outer beam portion 233 of the beam portion 23 corresponds to a position that coincides with the trajectory (movement of the center of gravity) of the landing part of the wearer's foot. Therefore, the outer beam portion 233 of the beam portion 23 can protect the sole of the wearer's foot from impact during walking so as to correspond to the trajectory of the landing part of the wearer's foot. When the wearer lands on the transverse arch part aligned with the ball of the foot, etc., force is transmitted from the fourth toe to the true grounding point near the heel, and the power of the Achilles tendon and calf is drawn out without stress. The same is true in the case of intermediate landing. When stress is applied to the pelvis and shin including the hip joint, the knee is subjected to force and stress that cracks or opens, so by reducing this stress, knee joint deformity can be prevented.

[0029] As described above, in the first bottom plate member 21, the trajectory of the landing part of the wearer's foot coincides with the outer beam portion 233. Then, as the wearer continues to walk, a large load is concentrated on the outer beam portion 233 of the beam portion 23 in the first bottom plate member 21, causing twisting. Therefore, in order to mitigate the action of twisting generated in the first bottom plate member 21 and to suppress excessive deformation of the first bottom plate member 21 itself, the inner beam portion 231 and the center beam portion 232 are formed. Since the inner beam portion 231 and the center beam portion 232 are not in direct contact with the outer beam portion 233 due to the hole portion 234, the action of pushing or pulling transmitted from the outer beam portion 233 is reduced. As a result, this contributes to the shape stability of the insole 1 in the footwear.

[0030] In the first bottom plate member 21, the length d3 of the beam portion 23 is 25 / 100 to 35 / 100 of the total length d1 of the first bottom plate member 21 (see FIG. 2(a)). The inner beam portion 231, the center beam portion 232, and the outer beam portion 233 each have a different length. If the length d3 of the beam portion 23 is less than 25 / 100 of the total length d1 of the first bottom plate member 21, the beam portion 23 becomes short and the effect of providing the beam portion 23 (movement of the center of gravity) is small. Conversely, if the length d3 of the beam portion 23 exceeds 35 / 100 of the total length d1 of the first bottom plate member 21, the beam portion 23 occupies a large portion of the first bottom plate member 21, which is not preferable in terms of maintaining the strength of the first bottom plate member 21 itself. Therefore, the above-mentioned range is a good example.

[0031] In the first bottom plate member 21, the maximum widths d4, d5, and d6 of the beams 23 are 5 / 100 to 15 / 100 of the total length d1 of the first bottom plate member 21 (see FIG. 2(a)). In the illustrated embodiment, the width of the inner beam 231 is d4, the width of the middle beam 232 is d5, and the width of the outer beam 233 is d6. The widths vary depending on the positions at which the individual beams 23 are formed. If the maximum width of the beams 23 is less than 6 / 100 of the total length d1 of the first bottom plate member 21, the width of the beams 23 is narrow and cannot absorb the movement of the center of gravity during walking, and the effect of absorbing the shock transmitted to the soles of the wearer's feet is reduced. If the maximum width of the beams 23 is more than 10 / 100 of the total length d1 of the first bottom plate member 21, the width of the beams 23 becomes too wide and it becomes difficult to exert resistance to the torsional deformation described above.

[0032] The thickness (height from the sole) of the inner beam portion 231, the center beam portion 232, and the outer beam portion 233 may be uniform, or the center beam portion 232 and the outer beam portion 233 may be the same thickness and the inner beam portion 231 may be low, or the center beam portion 232 may be the center height, the outer beam portion 233 may be the same thickness as the center beam portion 232, and the inner beam portion 231 may be low. The center beam portion 232, which corresponds to the fourth toe portion, is the thickest, so that the initial contact of the fourth toe (the first contact with the ground when walking) can be induced. The lengths of d4, d5, and d6 are basically uniform, but may vary.

[0033] The second bottom plate member 22 is a member that abuts against the first bottom plate member 21. Furthermore, as shown in Fig. 3(a), the second bottom plate member 22 extends from a rear surface portion 212 of the first bottom plate member 21 located on the heel portion 62 (see Fig. 10) side of the footwear 60 to a front surface portion 211 that reaches a middle position in the longitudinal direction of the inner sole portion 61 of the footwear 60. Therefore, when the insole 1 is inserted into the footwear 60, approximately half of the inner sole portion 61 of the footwear 60 is covered. Furthermore, the second bottom plate member 22 is provided with a beam portion 24 between the rear surface portion 212 and the front surface portion 211.

[0034] In the second bottom plate member 22 of the embodiment, three beam portions 24 are formed, and the beam portions 24 are formed in the order of inner beam portion 241, center beam portion 242, and outer beam portion 243 from the inside (arch side) of the inner sole portion 61 of the footwear 60 (see FIG. 3(a)). In the illustrated embodiment, the rear surface portion 222 and the front surface portion 221 of the second bottom plate member 22 are connected. Note that the illustration shows a right foot, and the left foot is symmetrical, so the illustration is omitted. By providing multiple beam portions 24 on the second bottom plate member 22, the impact transmitted from the footwear 60 to the sole of the wearer's foot via the second bottom plate member 22 during walking is reduced.

[0035] As can be seen from the figures, holes 244 are formed between the beams 24. In the embodiment, holes 244 are formed between the inner beam 241 and the central beam 242, and between the central beam 242 and the outer beam 243. In the second bottom plate member 22, when providing strength and weakness in the thickness of the multiple beams 24 (inner beam 241, central beam 242, and outer beam 243) and the parts other than the beams 24, it is preferable to form holes 244. In addition, since the holes 244 are formed by punching (Thomson processing, etc.) or injection molding, they are excellent in workability and mass productivity. In addition to the embodiment shown in the figures, the position where the beams 24 of the second bottom plate member 22 are formed may be formed on the arch side of the wearer (the navicular bone B2 side in FIG. 7) or the fifth metatarsal B8 side. When the footwear wearer has flat feet, or depending on the size, shape, degree of disability, etc., the formation position of the beam portion 24 of the second sole plate member 22 is adjusted. Regarding the names of the bones of the foot in Fig. 7, B1 is the calcaneus, B2 is the navicular bone, B3 is the cuneiform bone, B4 is the first metatarsal, B5 is the second metatarsal, B6 is the third metatarsal, B7 is the fourth metatarsal, and B8 is the fifth metatarsal.

[0036] The role of the beam portion 24 of the second bottom plate member 22 is roughly as follows. When a wearer of the footwear walks, the footwear lands on the ground from the heel, and the landing part moves in an arc shape from the calcaneus B1 to the navicular bone B2 and then to the fifth metatarsal B8 side in FIG. 7. At this time, the outer beam portion 243 of the beam portion 24 corresponds to a position that coincides with the trajectory (movement of the center of gravity) of the landing part of the wearer's foot. Therefore, the outer beam portion 243 of the beam portion 24 can protect the sole of the wearer's foot from impact during walking so as to correspond to the trajectory of the landing part of the wearer's foot. When the wearer lands on the transverse arch part aligned with the ball of the foot, etc., force is transmitted from the fourth toe to the true grounding point near the heel, and the power of the Achilles tendon and calf is drawn out without stress. The same is true for intermediate landing. When stress is applied to the pelvis and shin including the hip joint, the knee is subjected to force and stress that cracks or opens, so by reducing this stress, knee joint deformity can be prevented.

[0037] As described above, in the second bottom plate member 22, the trajectory of the landing part of the wearer's foot coincides with the outer beam portion 243. Then, as the wearer continues to walk, a large load is concentrated on the outer beam portion 243 of the beam portion 24 of the second bottom plate member 22, causing twisting. Therefore, in order to mitigate the action of twisting generated in the second bottom plate member 22 and suppress excessive deformation of the second bottom plate member 22 itself, the inner beam portion 241 and the center beam portion 242 are formed. Since the inner beam portion 241 and the center beam portion 242 are not in direct contact with the outer beam portion 243 due to the hole portion 244, the action of pushing or pulling transmitted from the outer beam portion 243 is reduced. As a result, this contributes to the shape stability of the insole 1 in the footwear.

[0038] In the second bottom plate member 22, the length d13 in the longitudinal direction is slightly shorter than the length d1 in the longitudinal direction of the first bottom plate member 21, and the length d14 in the width direction is slightly shorter than the length d2 in the width direction of the first bottom plate member 21. The length d15 of the beam portion 24, the width d17 of the central beam portion 242, and the width d19 of the hole portion 244 are approximately the same as the length d3 of the beam portion 23 of the first bottom plate member 21, the width d5 ​​of the central beam portion 232, and the width d7 of the hole portion 234. The width d16 of the inner beam portion 241 and the width d18 of the outer beam portion 243 are slightly shorter than the width d4 of the inner beam portion 231 and the width d6 of the outer beam portion 233.

[0039] There are individual long and short lengths for the beam portion 24. If the length d15 of the beam portion 24 is less than 25 / 100 of the total length d13 of the second bottom plate member 22, the beam portion 24 becomes short and the effect of providing the beam portion 23 (shifting the center of gravity) is small. Conversely, if the length d15 of the beam portion 24 exceeds 35 / 100 of the total length d13 of the second bottom plate member 22, the beam portion 24 takes up a large portion of the second bottom plate member 22, which is not preferable in terms of maintaining the strength of the second bottom plate member 22 itself. Therefore, the above-mentioned range is a good example.

[0040] In the second bottom plate member 22, the maximum widths d16, d17, and d18 of the beams 24 are 6 / 100 to 10 / 100 of the total length d1 of the second bottom plate member 22 (see FIG. 3(a)). In the illustrated embodiment, the width of the inner beam 241 is d16, the width of the middle beam 242 is d17, and the width of the outer beam 244 is d18. The widths vary depending on the formation position of each beam 24. If the maximum width of the beam 24 is less than 6 / 100 of the total length d13 of the second bottom plate member 22, the width of the beam 24 is narrow and cannot absorb the movement of the center of gravity during walking, and the effect of absorbing the shock transmitted to the sole of the wearer's foot is reduced. If the maximum width of the beam 24 exceeds 10 / 100 of the total length d13 of the second bottom plate member 22, the width of the beam 24 becomes too wide and it becomes difficult to exert resistance to the above-mentioned torsional deformation. Because the bottom plate member 2 is a combination of two pieces, the first bottom plate member 21 and the second bottom plate member 22, the shock absorption effect is improved and the load on the feet is reduced by adding the shear stress acting between the two members 21, 22 when walking.

[0041] The length of the width d16 of the inner beam portion 241 of the second bottom plate member 22 is slightly shorter than the length of the width d4 of the inner beam portion 231 of the first bottom plate member 21. This is because the muscle in the part of the wearer's foot corresponding to d4 is thickened, and the thickened muscle portion fits into the step between the inner beam portion 231 of the first bottom plate member 21 and the inner beam portion 241 of the second bottom plate member 22. The length of the width d18 of the outer beam portion 243 is also slightly shorter than the width d6 of the outer beam portion 233.

[0042] The thickness (height from the sole) of the inner beam portion 231, the center beam portion 232, and the outer beam portion 233 may be uniform, the center beam portion 232 and the outer beam portion 233 may be the same thickness and the inner beam portion 231 may be low, or the center beam portion 232 may be the center height, the outer beam portion 233 may be the same thickness as the center beam portion 232, and the inner beam portion 231 may be low. The center beam portion 232, which corresponds to the fourth toe portion, is the thickest, so that the initial contact of the fourth toe (the first contact with the ground when walking) can be induced. The widths of d16, d17, and d18 are basically uniform, but may vary.

[0043] 3(b), the first bottom plate member 21 and the second bottom plate member 22 are overlapped and then covered with the first fabric member 51. This is for the purpose of improving the appearance.

[0044] As can be seen from Figs. 1, 4 and 5, the intermediate member 30 is placed above the first bottom plate member 21 and directly under the true ground contact (landing) part near the heel (calcaneus B1) of the wearer of the footwear 60, with a predetermined distance from the rear end of the rear surface part 212 toward the middle position in the longitudinal direction of the inner sole 61 of the footwear 60 (see Figs. 7 and 8). The front end part 31 of the intermediate member 30 is located near the starting point of the beam part 23 of the first bottom plate member 21. The intermediate member 30, together with the first bottom plate member 21, is responsible for mitigating the impact transmitted to the sole of the wearer's foot, particularly the heel, when walking. In addition, when the length of the wearer's left and right feet differs, the thickness of the intermediate member 30 can be adjusted to make the lengths of the left and right feet the same, thereby reducing the burden on the wearer when walking. The intermediate member 30 is laminated not on the entire surface of the first base plate member 21 but on the actual ground contact portion from the heel to the heel side, for the sole purpose of shock absorption and adjustment.

[0045] Therefore, the total length d8 of the intermediate member 30 is 35 / 100 to 45 / 100 of the total length d1 of the first bottom plate member 21. If the total length d8 of the intermediate member 30 is less than 35 / 100 of the total length d1 of the first bottom plate member 21, the intermediate member 30 itself is short (small) and the effect of absorbing the shock transmitted to the sole of the foot is poor. If the total length d8 of the intermediate member 30 exceeds 45 / 100 of the total length d1 of the first bottom plate member 21, the beam portion 23 of the first bottom plate member 21 is covered, which may reduce the effect of the beam portion 23.

[0046] Furthermore, as a feature of the lamination of the intermediate member 30, the end of the rear surface portion 212 of the first bottom plate member 21 and the end of the rear end portion 32 of the intermediate member 30 do not coincide. As shown in Fig. 4, the rear end portion 32 of the intermediate member 30 is shifted in the toe direction from the rear surface portion 212 of the first bottom plate member 21.

[0047] The reason for intentionally shifting the layering position of the intermediate member 30 is that, as shown in the schematic diagram of FIG. 8, the intermediate member 30 is recessed to correspond to the shape of the part from the heel of the wearer of the footwear to the heel side (the true ground contact part). Tissues such as muscle and skin are present around the calcaneus B1 (see FIG. 7). Also, the area from the calcaneus B1 to the first metatarsal B4 and the like is curved like a bow. In other words, the area around the calcaneus B1 is a protruding part on the sole of the foot. Therefore, by shifting the layering position of the intermediate member 30 in order to appropriately receive the protrusion around the calcaneus B1, an appropriate recess is formed in the insole 1 on the heel part 62 (see FIGS. 9 and 10) side of the footwear 60 when the insole 1 is inserted into the footwear 60. The circumference of the calcaneus B1 fits into this recess, and the actual ground contact area from the heel to the heel-side is enclosed by the heel portion 62 of the footwear 60 and the insole 1, improving the comfort and stability of the footwear.

[0048] More specifically, the stacking position of the intermediate member 30 is placed on the first bottom plate member 21 at a distance (separation length d10) of 8 / 100 to 10 / 100 of the total length d1 of the first bottom plate member 21 from the rear surface portion 212 of the first bottom plate member 21 toward the middle position in the longitudinal direction of the inner sole 61 of the footwear 60. If the separation length d10 is less than 8 / 100 of the total length d1 of the first bottom plate member 21, the separation length d10 itself is short, and the desired recess is not formed when the insole 1 is inserted into the footwear 60. Also, when the stacking of the upper plate member 40 is taken into consideration, this becomes insufficient. Conversely, if the separation length d10 exceeds 10 / 100 of the total length d1 of the first base plate member 21, the recessed portion that is created when the insole 1 is inserted into the footwear 60 may become too large, which may result in a decrease in the shock absorption effect and comfort of the intermediate member 30.

[0049] The upper plate member 40 is placed above the intermediate member 30 and covers the intermediate member 30 (see Figs. 4(b), 5(b), and 6). Since the intermediate member 30 is placed on the first cloth member 51, even if the intermediate member 30 is provided with an inclined portion 3s as shown in Figs. 5 and 6, etc., a step exists between the first cloth member 51 and the intermediate member 30. The wearer is likely to feel uncomfortable with this step. Therefore, in order to eliminate the step and improve comfort, mainly to reduce the step between the first cloth member 51 and the intermediate member 30, the upper plate member 40 is placed above the intermediate member 30. As can be seen from Figs. 6 and 8, the step is eliminated and there is a gentle slope toward the front portion 211 of the first bottom plate member 21.

[0050] In the illustrated embodiment, the upper plate member 40 is aligned with the end of the rear end portion 32 of the intermediate member 30. This is to form an appropriate recess when the insole 1 is inserted into the footwear 60.

[0051] Furthermore, the second cloth member 52 is attached to the upper plate member 40. The second cloth member 52 is attached to the upper plate member 40 as shown in Figs. 5 and 7. That is, the rear end of the second cloth member 52 is located at the same position as the rear end of the intermediate member 30. That is, the second cloth member 52 is placed on the upper plate member 40 at a distance (d10) of 8 / 100 to 10 / 100 of the total length d1 of the first bottom plate member 21 from the rear surface portion 212 of the first bottom plate member 21 toward the middle position in the longitudinal direction of the inner sole 61 of the footwear 60. The reason for intentionally shifting the layering position of the second cloth member 52 is that it is recessed to correspond to the shape of the part from the heel of the footwear wearer to the heel side (the true ground contact part) as shown in the schematic diagram of Fig. 8. As a result, the second cloth member 52 covers the uppermost surface of the insole 1. The second cloth member 52 absorbs moisture due to sweating by the wearer. Furthermore, since it covers the lower layer, it enhances the decorativeness of the insole 1. The second cloth member 52 may be made of any suitable material such as cotton or synthetic fiber.

[0052] The bottom plate members 21, 22, intermediate member 30, and upper plate member 40 described above in detail are made of resin materials that are excellent in shock absorption, elasticity, shape retention, etc. They are made of various thermoplastic resins such as polyurethane (PUR), EVA (ethylene vinyl acetate), olefin-based elastomers, polystyrene-based rubber materials, and epoxy resins. These resins are lightweight and durable. Even if the resins are the same type, the elasticity, hardness, etc. are appropriately adjusted. Alternatively, pulp, polyester resin, etc. may be used instead of these.

[0053] Furthermore, at least the first bottom plate member 21 and the second bottom plate member 22 are formed from different resin materials. The second bottom plate member 22 may be made of a material harder than the first bottom plate member 21. Other different materials such as metal may be used instead of the resin material. The first bottom plate member 21 abuts against the inner sole 61 of the footwear 60 (see FIG. 9 described later) and plays a role in supporting the movement of the center of gravity during walking and converting it into rotation (upper pelvic rotation) smoothly, and depending on the walking or running method, it promotes landing from the vicinity of the transverse arch such as the ball of the foot, and the movement of the fourth toe and the heel to the ground contact part. From the viewpoint of ensuring the strength of the insole 1 itself, the second bottom plate member 22 is made of a resin material that is relatively harder than the first bottom plate member 21. The intermediate member 30 is made of a resin material that is somewhat elastic to absorb the impact applied to the true ground contact part from the heel to the heel of the wearer during walking. The intermediate member 30 is also made of a resin material that is relatively harder than the first bottom plate member 21 .

[0054] Here, the size of each part of the insole 1 will be described with a specific example. This example is for men's shoes, and for women's shoes and children's shoes, the length is converted to a reduced length. When the total length of the footwear 60 is, for example, 27 cm, the length d1 of the first bottom plate member 21 in the longitudinal direction is, for example, 15 cm, and the length d2 of the first bottom plate member 21 in the width direction is, for example, 7.2 cm. The length d3 of the beam portion 23 of the first bottom plate member 21 in the longitudinal direction is, for example, 4.5 cm. In addition, the length d4 of the inner beam portion 231 of the beam portion 23 in the width direction is, for example, 2 cm, the length d5 ​​of the center beam portion 232 in the width direction is, for example, 1.5 cm, and the length d6 of the outer beam portion 233 of the beam portion 23 is, for example, 1.8 cm. The length d13 of the second bottom plate member 22 in the longitudinal direction is, for example, 14 cm, and the length d14 of the second bottom plate member 22 in the width direction is, for example, 6.6 cm. The length d15 of the beam portion 24 of the second bottom plate member 22 in the longitudinal direction is, for example, 4.5 cm. The length d16 of the inner beam portion 241 of the beam portion 24 in the width direction is, for example, 1.5 cm, the length d17 of the center beam portion 242 in the width direction is, for example, 1.4 cm, and the length d18 of the outer beam portion 243 of the beam portion 24 is, for example, 1.5 cm.

[0055] The total length d8 of the intermediate member 30 is, for example, 6 cm, and the length d9 of the intermediate member 30 in the width direction is, for example, 5.5 cm. The total length d11 of the upper plate member 40 is, for example, 10 cm, and the length of the upper plate member 40 in the width direction is, for example, 6.5 cm. Of course, these numerical values ​​are merely examples, and may be changed as appropriate depending on the size of the foot of the wearer of the footwear, etc. Also, adjustments may be made depending on the degree of foot disability.

[0056] The insole 1 of the first embodiment illustrated and described above has a configuration in which a first bottom plate member 21, a second bottom plate member 22, an intermediate member 30, and an upper plate member 40 are arranged and stacked in this order from the bottom. As a simplified structure of the insole 1 of the first embodiment, an insole 1A of a second embodiment is shown as an exploded perspective view in Fig. 11.

[0057] In the insole 1A of the second embodiment, a first bottom plate member 2, an intermediate member 3, and an upper plate member 4 are layered in this order from below, and a cloth member 14 corresponding to the second cloth member is attached to the upper part of the upper plate member 4. As shown in Fig. 11, in the insole 1A of the second embodiment, the second bottom plate member and the first cloth member are omitted.

[0058] The functions, effects, shapes, and dimensions of the first bottom plate member 2, intermediate member 3, and upper plate member 4 in the insole 1A of the second embodiment are similar to those of the first bottom plate member 21, intermediate member 30, and upper plate member 40 in the insole 1 of the first embodiment described above, so descriptions thereof will be omitted.

[0059] In the insole 1 of the first embodiment, by increasing the number of parts, it is possible to perform fine adjustments according to the condition of the foot of the insole user. In contrast, the insole 1A of the second embodiment has a smaller total number of parts, which is favorable for mass production and is positioned as a popular insole. [Explanation of symbols]

[0060] 1,1A Insole 21 First bottom plate member 22 Second bottom plate member 30 Intermediate parts 40 Upper plate member 211 Front part 212 Rear part 23 Beam section 231 Internal beam part 232 Middle beam part 233 External beam part 234 Hole 31 Front end 32 Rear end 51 First fabric member 52 Second fabric member 60 Footwear

Claims

1. a first bottom plate member that covers the inner sole of the footwear by extending from a rear portion located on the heel side of the footwear to a front portion extending to a longitudinal intermediate position of the inner sole, and that has a beam portion between the rear portion and the front portion; a second bottom plate member that extends from a rear portion located on the heel side of the footwear to a front portion that reaches a longitudinal intermediate position of the insole to cover the first bottom plate member, and has a beam portion between the rear portion and the front portion; an intermediate member placed above the bottom plate member and directly below the true ground contact point near the heel from the rear end of the heel of the wearer of the footwear, with a predetermined distance from the rear end of the rear surface portion toward the intermediate position in the length direction of the inner sole, and placed on the second bottom plate member with a distance of 8 / 100 to 10 / 100 of the total length of the first bottom plate member from the rear surface portion of the first bottom plate member toward the intermediate position in the length direction of the inner sole, and forming a recess in the upper part of the second bottom plate member for receiving the protrusion of muscle and skin tissue around the calcaneus, which is a protruding part on the sole of the foot; an upper plate member placed above the intermediate member and covering the intermediate member; An insole characterized by:

2. The insole according to claim 1 , wherein the first bottom plate member has three beams, an inner beam, a center beam, and an outer beam, in that order from the inside of the inner sole of the footwear.

3. 2. The insole according to claim 1, wherein the second bottom plate member has three beams, an inner beam, a center beam, and an outer beam, in that order from the inside of the inner sole of the footwear.

4. 4. The insole according to claim 1, wherein holes are formed between the beams.

5. The insole according to claim 1 , wherein the second base plate member is narrower and harder than the first base plate member.

6. 6. The insole according to claim 1, wherein in the first base plate member, the length of the beam portion is 25 / 100 to 35 / 100 of the overall length of the first base plate member.

7. 7. The insole according to claim 1, wherein in the first base plate member, the maximum width of the beam portion is 5 / 100 to 15 / 100 of the overall length of the first base plate member.

8. The insole according to claim 1 , wherein a front end portion of the intermediate member is located in the vicinity of a starting point of the beam portion of the first bottom plate member.

9. 9. The insole according to claim 1, wherein the intermediate member has a total length which is 35 / 100 to 45 / 100 of a total length of the first base plate member.

10. The insole according to claim 1 , wherein the entire length of the upper plate member is shorter than the entire length of the first bottom plate member.

11. The insole according to claim 1 , wherein a first cloth member is attached to the second bottom plate member, and a second cloth member is attached to the top plate member.

12. The insole according to claim 1 , wherein at least the first base plate member and the second base plate member are made of different resin materials.

13. The insole according to claim 1 , wherein at least the first bottom plate member and the intermediate member are made of different resin materials.

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