JP2022118542A - insole - Google Patents

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

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to insoles, and more particularly to insoles that are inserted into various types of footwear to protect the feet of the wearer of the footwear.

2. Description of the Related Art In recent years, techniques have been developed for soles that form the soles of footwear and have excellent functionality for protecting the feet of users.

For example, Patent Literature 1 discloses a sole having a function of protecting a user's ankle.

The sole disclosed in Patent Document 1 has a sole structure including an outsole, a carbon fiber sheet provided on the outsole and including at least a heel protection film, and an insole provided on the carbon fiber sheet. This solves the problem that the user's foot steps on a slippery ground or steps on another person's foot and twists the ankle, causing a movement disorder such as a severe sprain. It is said to have a protective function.

In the case of the sole disclosed in US Pat. No. 5,400,000, the insole consists only of a single flat sheet. Generally, it is known that there are three types of human walking and running motions. The first method is to move the center of gravity by sequentially landing from the heel (from the heel side to the calcaneal epiphysis) to the toes and sequentially taking off from the heel to the toes. In other words, the heel is the part that first applies foot pressure to the ground when landing and taking off, and it is necessary to properly protect this part. The posterior end of the human foot consists of the heel and surrounding muscles, and when a person lands on the posterior end of the calcaneus (epiphysis of the calcaneus), the movement of the center of gravity is braked. The part in contact with the ground floats slightly. The part in contact with the ground is the part a little 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 foot, which is the true landing point near the heel of the human foot. I have a problem that I can't. The second is to land on the ball of the foot (called the lateral arch side) such as the ball of the foot and push forward with the same part (heel) as the first. The third is an intermediate landing between the first and second, that is, the bottom of the calcaneus and the lateral arch almost simultaneously. It is known that these three types are formed by the ethnic culture of each country, the height of the heel, and the characteristics of the shoes. Note that the heel rearmost end is a provisional contact point (landing point). On the other hand, the true contact point is the lowest point of the calcaneus (the lowest point of the calcaneus located on the ankle side from the rearmost part of the calcaneus).

JP 2020-505156 A

Therefore, the present invention has been made in view of the above problems, and it fits the shape of the grounding point near the heel of the human foot and the sole around the arch of the foot, and smoothly and smoothly shifts the center of gravity during walking and running. To provide an insole capable of appropriately protecting the feet of a user, especially the feet of a person who has a foot injury, by designing the shape of the insole to facilitate wear.

In order to solve the above-mentioned problems, an insole according to an aspect of the present invention extends from a rear portion that abuts against the inner sole of footwear and is located on the heel side of the footwear to a front portion that reaches an intermediate position in the longitudinal direction of the inner sole. a first sole plate member that extends to cover the inner sole of the footwear and is provided with a beam portion between the rear surface portion and the front portion; An intermediate member placed directly below the true ground contact point near the heel from the rearmost end of the heel of the wearer of the footwear at a predetermined distance toward the intermediate position side, and an intermediate member placed above the intermediate member. and a covering upper plate member.

In the above-mentioned insole, a beam extends from the rear surface portion located on the heel side of the footwear to the front surface portion extending to the intermediate position in the longitudinal direction of the inner sole to cover the first sole plate member, and between the rear surface portion and the front surface portion. A second base member provided with a portion may be provided.

In the above-described insole, the first sole plate member may have three beam portions, an inner beam portion, a middle beam portion, and an outer beam portion, in order from the inner side of the inner bottom portion of the footwear. Also, in the second sole plate member, the three beam portions may be formed in order from the inside of the inner bottom portion of the footwear, ie, an inner beam portion, a middle beam portion, and an outer beam portion.

In the above insole, holes may be formed between the beams.

The second soleplate member may be narrower and stiffer than the first soleplate member.

In the above insole, in the first sole plate member, the length of the beam portion may be 25/100 to 35/100 of the total length of the sole plate member. Further, in the above insole, in the first sole plate member, the maximum width of the beam portion may be 5/100 to 15/100 of the total length of the sole plate member.

In the above insole, the intermediate member extends from 8/100 to 10/100 of the total length of the first sole plate member from the rear end of the first sole plate member toward the intermediate position side in the longitudinal direction of the inner sole. It may be spaced and mounted on the first bottom plate member.

In the above insole, the front end portion of the intermediate member may be located near the starting point position of the beam portion of the first sole plate member.

In the above insole, the intermediate member may have a total length of 35/100 to 45/100 of the total length of the first sole plate member.

In the above insole, the total length of the upper plate member may be shorter than the total length of the first bottom plate member.

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

In the above insole, at least the first bottom plate member and the second bottom plate member may be made of different resin materials.

At least the first bottom plate member and the intermediate member may be made of different resin materials.

The insole of the present invention abuts against the inner sole of the footwear and extends from the rear surface located on the heel side of the footwear to the front surface extending to the middle position in the longitudinal direction of the inner sole to cover the inner sole of the footwear. a first bottom plate member having a beam portion between the face portion and the front face portion; Since the intermediate member is placed directly below the true grounding point near the heel from the rearmost end of the heel of the wearer of the footwear, and the upper plate member is placed above the intermediate member and covers the intermediate member, It is possible to design the shape of the insole that fits the shape of the grounding point from the heel to the heel side of the foot and the shape of the sole around the arch of the foot and smooth and facilitates the movement of the center of gravity during walking and running. It is possible to properly protect the feet of a person who has a pain in the feet.

1 is an exploded perspective view showing an insole according to a first embodiment of the invention; FIG. (a) is a plan view showing a first bottom plate member of the insole, (b) is a plan view showing an intermediate member of the insole, and (c) is a plan view showing an upper plate member of the insole. (a) is a plan view showing a state in which the first bottom plate member and the second bottom plate member of the same insole are superimposed; 2 is a plan view showing a state in which the cloth members are superimposed on each other. FIG. (a) is a plan view showing a 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 superimposed; (b) is the first bottom plate member of the same insole; 3 is a plan view showing a state in which the second bottom plate member, the first cloth member, the intermediate member, and the upper plate member are overlapped with each other. FIG. (a) is a perspective view showing a 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 superimposed, and (b) is the first bottom plate member of the same insole. 3 is a perspective view showing a state in which the second bottom plate member, the first cloth member, the intermediate member, and the upper plate member are superimposed on each other. FIG. FIG. 2 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 overlaid and a second cloth member is overlaid thereon. . 1 is an anatomical drawing showing bones of a human foot and muscles around the bones; FIG. It is a figure which shows the state which combined the human foot and the insole of this invention. 1 is a perspective view showing the state of use of the insole of the present invention; FIG. FIG. 2 is a side view transparently showing the state of use of the insole of the present invention. FIG. 5 is an exploded perspective view showing an insole according to a second embodiment of the invention;

The insole of the present invention can be used for various sports shoes such as running shoes, walking shoes, baseball shoes, soccer shoes, basketball shoes, tennis shoes, golf shoes, ski and snowboard boots, boots, business shoes and pumps. , nurse shoes, sandals, and other known footwear, and is placed and abutted on the inner bottom of these footwear (bottom surface on the inner side of the footwear). In addition, 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 with the wearer's footwear depending on the purpose). In other words, the insole is a kind of member that reduces the impact transmitted from the footwear to the soles of the wearer's feet and suppresses unnecessary braking to help the propulsive force. It can be used to prevent inward bending of the ankle, which is a drawback of many shoes so far, and the resulting injury and stress.

An insole 1 according to a first embodiment of the present invention will be described with reference to FIG. 1 and other drawings. As can be seen from the exploded perspective view of FIG. 1, the insole 1 includes a first bottom plate member 21 and a second bottom plate member in order from the side that abuts on the inner bottom portion 61 of footwear 60 (see FIG. 9 described later). 22, a first cloth member 51, an intermediate member 30, an upper plate member 40, and a second cloth member 52 are laminated. In the illustrated embodiment, a second cloth member 52 is applied over the top plate member 40 . Also, 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. Also, instead of the second bottom plate member 22, a non-slip material having a tacky feel may be applied under the first bottom plate member 21. FIG.

The first sole plate member 21 is a member that abuts against the inner bottom portion 61 of the footwear 60 . As described above, when a non-slip, tacky material is applied under the first sole plate member 21 , the first sole plate member 21 does not come into contact with the inner bottom portion 61 of the footwear 60 . Further, as shown in FIG. 2( a ), the first sole plate member 21 extends from the rear surface portion 212 of the first sole plate member 21 located on the side of the heel portion 62 (see FIG. 9 ) of the footwear 60 to the inner sole portion of the footwear 60 . 61 extends to the front portion 211 to an intermediate position in the longitudinal direction. Therefore, when the insole 1 is inserted into the footwear 60, approximately half of the inner sole 61 of the footwear 60 is covered. Further, the first bottom plate member 21 is provided with a beam portion 23 between the rear portion 212 and the front portion 211 .

In the first sole plate member 21 of the embodiment, three beam portions 23 are formed, and from the inner side (arch side) of the inner sole portion 61 of the footwear 60, an inner beam portion 231, a middle beam portion 232, and an outer beam portion 233 are formed. The beam portion 23 is formed in the order of (see FIG. 2(a)). In the drawing, the rear surface portion 212 and the front surface portion 211 of the first bottom plate member 21 are connected. It should be noted that the illustration is for the right foot, and the illustration for the left foot is omitted because it is symmetrical. By providing the plurality of beams 23 on the first sole plate member 21, the shock transmitted from the footwear 60 to the soles of the wearer's feet via the first sole plate member 21 during walking is reduced.

As can be understood particularly from the illustration, holes 234 are formed between the beams 23 . In the embodiment, hole portions 234 are formed between the inner beam portion 231 and the middle beam portion 232 and between the middle beam portion 232 and the outer beam portion 233, respectively. In the first bottom plate member 21, the thickness of the plurality of beams 23 (the inner beam 231, the middle beam 232, and the outer beam 233) and the portions other than the beams 23 are different. A form in which the portion 234 is formed is preferred. Further, since the hole portion 234 is formed by punching (Thomson processing, etc.) or injection molding, it is excellent in workability and high in mass productivity. The formation position of the beam portion 23 of the first sole plate member 21 may be formed on the wearer's arch side (the navicular bone B2 side in FIG. 6) or the fifth metatarsal bone B8 side in addition to the illustrated embodiment. good. The formation position of the beam portion 23 of the first sole plate member 21 is adjusted depending on the size and shape of the bones, the degree of injury, etc., if the wearer of the footwear has flat feet. B1 is the calcaneus, B2 is the scaphoid, B3 is the cuneiform, B4 is the first metatarsal, B5 is the second metatarsal, and B6 is the third metatarsal. , B7 is the fourth metatarsal bone, and B8 is the fifth metatarsal bone.

The role of the beam portion 23 of the first bottom plate member 21 is generally as follows. When the wearer of the footwear walks, the footwear lands on the ground from the heel, and the landing portion moves in an arc from the calcaneus B1 to the scaphoid B2 and then to the fifth metatarsal B8 side in FIG. 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 portion 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 portion of the wearer's foot. When you land on the lateral arch part that lines the ball of the foot, the power is transmitted from the fourth finger to the true grounding point near the heel, drawing out the power of the Achilles tendon and calf without stress. The same applies to intermediate landings. When stress is applied to the pelvis including the hip joint and the shin, the knee is cracked or opened.

As described above, in the first sole plate member 21 , the trajectory of the landing portion of the wearer's foot coincides with the outer beam portion 233 . Then, while walking is continued, a large load is applied to the first bottom plate member 21 by concentrating on the outer beam portion 233 of the beam portion 23, and twisting occurs. Therefore, the inner beam portion 231 and the middle beam portion 232 are formed in order to reduce the torsional action of the first bottom plate member 21 and suppress excessive deformation of the first bottom plate member 21 itself. Since the inner beam portion 231 and the middle beam portion 232 are not in direct contact with the outer beam portion 233 due to the hole portion 234, the action of pushing, pulling, etc. transmitted from the outer beam portion 233 is reduced. As a result, it contributes to the shape stability of the insole 1 in footwear.

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)). Note that the lengths of the inner beam portion 231, the middle beam portion 232, and the outer beam portion 233 each have lengths. 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 is shortened and the effect of providing the beam portion 23 (shifting the center of gravity) is small. Conversely, when 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 occupying the first bottom plate member 21 becomes large, and the first bottom plate member 21 itself It is not preferable from the viewpoint of strength maintenance. Therefore, the aforementioned range is a good example.

In the first bottom plate member 21, the maximum widths d4, d5, d6 of the beam portions 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 portion 231 is d4, the width of the middle beam portion 232 is d5, and the width of the outer beam portion 233 is d6. The width differs depending on the formation position of each beam portion 23 . 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 too narrow to accommodate the movement of the center of gravity during walking, and the wearer's feet may be deformed. The effect of shock absorption transmitted to the back is reduced. If the maximum width of the beam portion 23 exceeds 10/100 of the total length d1 of the first bottom plate member 21, the width of the beam portion 23 becomes too wide, and the aforementioned resistance to torsional deformation becomes difficult to exert.

The thickness of the inner beam portion 231, the middle beam portion 232, and the outer beam portion 233 (the height from the sole) may be uniform, and the middle beam portion 232 and the outer beam portion 233 have the same thickness, and the inner beam portion 231 may be low, the middle beam portion 232 may be the center height, the outer beam portion 233 may have the same thickness as the middle beam portion 232, and the inner beam portion 231 may be low. Since the middle beam portion 232 corresponding to the fourth finger portion is the thickest, the initial contact of the fourth finger (the first ground contact during walking) can be induced. Also, the lengths of d4, d5 and d6 are essentially uniform, but may vary.

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

In the second sole plate member 22 of the embodiment, three beams 24 are formed, and from the inner side (arch side) of the inner sole 61 of the footwear 60, an inner beam 241, a middle beam 242, and an outer beam 243 are formed. The beam portion 24 is formed in this order (see FIG. 3(a)). The illustration shows a form in which the rear surface portion 222 and the front surface portion 221 of the second bottom plate member 22 are connected. It should be noted that the illustration is for the right foot, and the illustration for the left foot is omitted because it is symmetrical. By providing the plurality of beams 24 on the second sole plate member 22, impact transmitted from the footwear 60 to the soles of the wearer's feet via the second sole plate member 22 during walking is reduced.

As can be understood particularly from the illustration, holes 244 are formed between the beams 24 . In the embodiment, hole portions 244 are formed between the inner beam portion 241 and the middle beam portion 242 and between the middle beam portion 242 and the outer beam portion 243, respectively. In the second bottom plate member 22, the thickness of the plurality of beams 24 (the inner beam 241, the middle beam 242, and the outer beam 243) and the thickness of the portions other than the beams 24 are varied. A form in which the portion 244 is formed is preferable. In addition, since the hole 244 is formed by punching (Thomson processing, etc.) or injection molding, the workability is excellent and the mass productivity is high. The formation position of the beam portion 24 of the second sole plate member 22 may be formed on the wearer's arch side (the navicular bone B2 side in FIG. 7) or the fifth metatarsal bone B8 side in addition to the illustrated embodiment. good. The formation position of the beam portion 24 of the second sole plate member 22 is adjusted depending on the size and shape of the bones, the degree of injury, and the like, if the wearer of the footwear has flat feet. B1 is the calcaneus, B2 is the scaphoid, B3 is the cuneiform, B4 is the first metatarsal, B5 is the second metatarsal, and B6 is the third metatarsal. , B7 is the fourth metatarsal bone, and B8 is the fifth metatarsal bone.

The roles of the beams 24 of the second bottom plate member 22 are generally as follows. When the wearer of the footwear walks, the footwear lands on the ground from the heel, and the landing portion moves in an arc from the calcaneus B1 to the scaphoid B2 and then to the fifth metatarsal B8 side in FIG. 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 portion 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 portion of the wearer's foot. When you land on the lateral arch part that lines the ball of the foot, the power is transmitted from the fourth finger to the true grounding point near the heel, drawing out the power of the Achilles tendon and calf without stress. The same applies to intermediate landings. When stress is applied to the pelvis including the hip joint and the shin, the knee is cracked or opened.

As described above, in the second sole plate member 22 , the trajectory of the landing portion of the wearer's foot coincides with the outer beam portion 243 . Then, while walking is continued, a large load is applied to the second bottom plate member 22 by concentrating on the outer beam portion 243 of the beam portion 24, and twisting occurs. Therefore, the inner beam portion 241 and the middle beam portion 242 are formed in order to reduce the torsional action of the second bottom plate member 22 and suppress excessive deformation of the second bottom plate member 22 itself. Since the inner beam portion 241 and the middle beam portion 242 are not in direct contact with the outer beam portion 243 due to the hole portion 244, the action of pushing, pulling, etc. transmitted from the outer beam portion 243 is reduced. As a result, it contributes to the shape stability of the insole 1 in footwear.

In the second bottom plate member 22, the longitudinal length d13 is slightly shorter than the longitudinal length d1 of the first bottom plate member 21, and the widthwise length d14 is the width direction of the first bottom plate member 21. is slightly shorter than the length d2 of . The length d15 of the beam portion 24, the width d17 of the middle beam portion 242, and the width d19 of the hole portion 244 are the length d3 of the beam portion 23 of the first bottom plate member 21, the width d5 of the middle beam portion 232, and the width d19 of the hole portion 244. , is substantially the same as 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 .

Regarding the length of the beam portion 24, there are merits and demerits for each. When 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 is shortened and the effect of providing the beam portion 23 (shifting the center of gravity) is small. Conversely, when 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 occupying the second bottom plate member 22 becomes large, and the second bottom plate member 22 itself It is not preferable from the viewpoint of strength maintenance. Therefore, the aforementioned range is a good example.

In the second bottom plate member 22, the maximum widths d16, d17, and d18 of the beam portions 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 portion 241 is d16, the width of the middle beam portion 242 is d17, and the width of the outer beam portion 244 is d18. The width differs depending on the formation position of each beam portion 24 . If the maximum width of the beams 24 is less than 6/100 of the total length d13 of the second bottom plate member 22, the width of the beams 24 is too narrow to accommodate the movement of the center of gravity during walking, and the wearer's feet may be deformed. The effect of shock absorption transmitted to the back is reduced. If the maximum width of the beams 24 exceeds 10/100 of the total length d13 of the second bottom plate member 22, the width of the beams 24 becomes too wide, and the aforementioned resistance to torsional deformation becomes difficult to exert. Since the bottom plate member 2 is a combination of the first bottom plate member 21 and the second bottom plate member 22, the impact absorption effect is improved and the shear stress acting between the two members 21 and 22 during walking is also added to the foot. load can be reduced.

The width d16 of the inner beam portion 241 of the second bottom plate member 22 is slightly shorter than the width d4 of the inner beam portion 231 of the first bottom plate member 21 . This is because the portion of the wearer's foot corresponding to d4 is thickened, and the muscle is thickened between the steps 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. This is because the muscles that are The width d18 of the outer beam portion 243 is also slightly shorter than the width d6 of the outer beam portion 233. As shown in FIG.

The thickness of the inner beam portion 231, the middle beam portion 232, and the outer beam portion 233 (the height from the sole) may be uniform, and the middle beam portion 232 and the outer beam portion 233 have the same thickness, and the inner beam portion 231 may be low, the middle beam portion 232 may be the center height, the outer beam portion 233 may have the same thickness as the middle beam portion 232, and the inner beam portion 231 may be low. Since the middle beam portion 232 corresponding to the fourth finger portion is the thickest, the initial contact of the fourth finger (the first ground contact during walking) can be induced. Also, the widths of d16, d17 and d18 are basically uniform, but may vary.

Next, as shown in FIG. 3(b), the first cloth member 51 is applied on the first bottom plate member 21 and the second bottom plate member 22 which are overlaid. This is for appearance improvement.

As understood from FIGS. 1, 4 and 5, the intermediate member 30 extends from above the first sole plate member 21 and from the rear end of the rear surface portion 212 to an intermediate position in the longitudinal direction of the inner sole portion 61 of the footwear 60 . The shoes 60 are placed on the wearer's heel (calcaneus B1) directly below the real contact (landing) portion of the footwear 60 toward the side at a predetermined distance (see FIGS. 7 and 8). A front end portion 31 of the intermediate member 30 is positioned near the starting point position of the beam portion 23 of the first bottom plate member 21 . The intermediate member 30, together with the first sole plate member 21, is responsible for mitigating the impact transmitted to the soles of the wearer's feet, particularly the heels, during walking. Further, when the length of the wearer's left and right legs is different, the thickness of the intermediate member 30 can be adjusted to make the lengths of the left and right legs the same, thereby reducing the burden during walking. The intermediate member 30 is laminated not on the entire surface of the first sole plate member 21 but on the true contact portion near the heel from the heel to the heel for the purposes of shock absorption and adjustment.

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. As shown in FIG. 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 impact transmitted to the sole 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, it will cover the beam portion 23 of the first bottom plate member 21, which may reduce the effect of the beam portion 23. .

Furthermore, as a feature of the lamination of the intermediate member 30, the rear surface portion 212 of the first bottom plate member 21 and the rear end portion 32 of the intermediate member 30 do not coincide with each other. As shown in FIG. 4, the rear end portion 32 of the intermediate member 30 is offset from the rear surface portion 212 of the first bottom plate member 21 in the tiptoe direction.

The reason for deliberately shifting the lamination position of the intermediate member 30 is that, as shown in the schematic diagram of FIG. Tissues such as muscle and skin exist around the calcaneus B1 (see FIG. 7). Also, the calcaneus B1 and the first metatarsal B4 are curved like an arch. In other words, the area around the calcaneus B1 is a projecting portion of the sole. Therefore, in order to appropriately receive the protrusion around the calcaneus B1, by shifting the stacking position of the intermediate member 30, when the insole 1 is inserted into the footwear 60, the heel portion 62 of the footwear 60 (see FIGS. 9 and 10) A moderate depression is formed in the insole 1 on the side. Therefore, the circumference of the calcaneus B1 is accommodated in this recess, and the real ground-contacting portion from the heel to the heel is wrapped by the heel portion 62 of the footwear 60 and the insole 1, thereby enhancing the comfort and stability of the footwear.

More specifically, the intermediate member 30 is stacked from the rear surface portion 212 of the first bottom plate member 21 toward the middle position side in the length direction of the inner bottom portion 61 of the footwear 60 . 21 are placed on the first bottom plate member 21 with a distance of 8/100 to 10/100 of the total length d1 of the base plate 21 (separation length d10). If the separation length d10 is less than 8/100 of the total length d1 of the first sole plate member 21, the separation length d10 itself is short, and the desired depression is not formed when the insole 1 is inserted into the footwear 60. Also, considering the lamination of the upper plate member 40, it becomes insufficient. If the separation length d10 exceeds 10/100 of the total length d1 of the first sole plate member 21, conversely, the recessed portion generated when the insole 1 is inserted into the footwear 60 becomes too large, and the impact from the intermediate member 30 is increased. This may lead to a decrease in absorption effect and wearing comfort.

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 the inclined portion 3s as shown in FIGS. exists. The wearer tends to feel uncomfortable with the step. Therefore, the upper plate member 40 is placed above the intermediate member 30 mainly to alleviate the step between the first cloth member 51 and the intermediate member 30 in order to eliminate the step and improve the comfort. As can be understood from FIGS. 6 and 8, the step is eliminated and the first bottom plate member 21 has a gentle slope toward the front surface portion 211 .

In the illustrated embodiment, the top plate member 40 is aligned with the end of the trailing end 32 of the intermediate member 30 . This is for forming an appropriate recess when the insole 1 is inserted into the footwear 60 .

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. That is, the rearmost end of the second cloth member 52 is at the same position as the rearmost end of the intermediate member 30 . That is, the second cloth member 52 extends from the rear surface portion 212 of the first bottom plate member 21 toward the middle position side in the longitudinal direction of the inner bottom portion 61 of the footwear 60, and extends 8/8 of the total length d1 of the first bottom plate member 21. They are mounted on the upper plate member 40 with a distance of 100 to 10/100 (separation length d10). The reason why the lamination position of the second cloth member 52 is intentionally shifted is that it is recessed so as to correspond to the shape of the heel-to-heel portion (true contact portion) of the wearer of the footwear, as shown in the schematic diagram of FIG. is. 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 perspiration of the wearer. Furthermore, since the lower layer is covered, the decorativeness of the insole 1 is enhanced. The material of the second cloth member 52 is appropriate, such as cotton or synthetic fiber.

The bottom plate members 21 and 22, the intermediate member 30, and the upper plate member 40, which have been described in detail so far, are made of a resin material that is excellent in shock absorption, elasticity, shape retention, and the like. These are made of various thermoplastic resins such as polyurethane (PUR), EVA (ethylene vinyl acetate), olefinic elastomers, polystyrene rubber materials, and epoxy resins. These resins are lightweight and durable. Moreover, even if the resins are of the same type, the elasticity, hardness, etc. are appropriately adjusted. Alternatively, instead of these, pulp, polyester resin, or the like may be used.

Furthermore, at least the first bottom plate member 21 and the second bottom plate member 22 are made of different resin materials. Also, the second bottom plate member 22 may be made of a harder material than the first bottom plate member 21 . Other different materials, such as metal, may be used in place of the resin material. The first bottom plate member 21 abuts on 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 smoothing the rotation (upper pelvic rotation). Depending on the running method, it encourages the landing from the vicinity of the lateral arch such as the ball of the foot, and the movement of the fourth toe and the heel-to-heel contact area. From the viewpoint of ensuring the strength of the insole 1 itself, the second bottom plate member 22 is made of a relatively hard resin material compared to the first bottom plate member 21 . For the intermediate member 30, a resin material having a little elasticity is selected from the standpoint of mitigating the shock applied to the real contact portion near the heel of the wearer when walking. The intermediate member 30 is also made of a relatively hard resin material compared to the first bottom plate member 21 .

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

The total length d8 of the intermediate member 30 is, for example, 6 cm, and the widthwise length d9 of the intermediate member 30 is, for example, 5.5 cm. The total length d11 of the upper plate member 40 is, for example, 10 cm, and the widthwise length of the upper plate member 40 is, for example, 6.5 cm. Of course, these numerical values are only examples, and may be changed as appropriate depending on the size of the foot of the wearer of the footwear. In addition, it is adjusted according to the degree of the foot disorder.

The insole 1 of the first embodiment illustrated and described in detail so far 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 laminated in order from below. be. As a simplified structure of the insole 1 of the first embodiment, an insole 1A of the second embodiment is shown as shown in the exploded perspective view of FIG.

In the insole 1A of the second embodiment, the first bottom plate member 2, the intermediate member 3, and the top plate member 4 are laminated in order from below, and the cloth member 14 corresponding to the second cloth member is the upper portion of the top plate member 4. is adhered to. As shown in FIG. 11, the insole 1A of the second embodiment has a structure in which the above-described second bottom plate member and first cloth member are omitted.

The functions, effects, shapes, and dimensions of the first bottom plate member 2, the intermediate member 3, and the top plate member 4 in the insole 1A of the second embodiment are the same as those of the first bottom plate member in the insole 1 of the first embodiment. 21, the intermediate member 30, and the upper plate member 40, the description thereof is omitted.

By increasing the number of parts in the insole 1 of the first embodiment, it is possible to finely adjust the insole according to the condition of the user's foot. On the other hand, the insole 1A of the second embodiment has a reduced total number of parts, so it is suitable for mass production and positioned as a popular insole.

1, 1A Insole 21 First bottom plate member 22 Second bottom plate member 30 Intermediate member 40 Top plate member 211 Front part 212 Rear part 23 Beam part 231 Inner beam part 232 Middle beam part 233 Outer beam part 234 Hole part 31 Front end part 32 rear end portion 51 first cloth member 52 second cloth member 60 footwear

Claims (15)

The rear surface portion abuts on the inner sole portion of the footwear and extends from the rear surface portion positioned on the heel side of the footwear to the front surface portion extending to the intermediate position in the longitudinal direction of the inner sole portion to cover the inner sole portion of the footwear, and the rear surface portion and a first bottom plate member provided with a beam portion between the front surface portion;
Above the bottom plate member and from the rear end portion of the rear surface portion toward the intermediate position side in the longitudinal direction of the inner sole, there is a true contact from the rearmost end of the heel of the wearer of the footwear toward the heel at a predetermined distance. an intermediate member placed directly under the point;
and an upper plate member placed above the intermediate member and covering the intermediate member. extending from a rear surface located on the heel side of the footwear to a front surface extending to an intermediate position in the longitudinal direction of the inner sole to cover the first sole plate member, and between the rear surface and the front surface; 2. The insole according to claim 1, further comprising a second sole plate member provided with beams. 2. The insole according to claim 1, wherein said first sole plate member has three beam portions, an inner beam portion, a middle beam portion, and an outer beam portion, in order from the inner side of said inner bottom portion of said footwear. 3. The insole according to claim 2, wherein said second sole plate member has three beam portions, an inner beam portion, a middle beam portion and an outer beam portion, in order from the inner side of said inner bottom portion of said footwear. The insole according to any one of claims 1 to 4, wherein holes are formed between beams. The insole according to claim 2, wherein the second sole plate member is narrower and harder than the first sole plate member. The insole according to any one of claims 1 to 6, wherein the length of the beam portion of the first bottom plate member is 25/100 to 35/100 of the total length of the first bottom plate member. The insole according to any one of claims 1 to 7, wherein the maximum width of the beam portion of the first bottom plate member is 5/100 to 15/100 of the total length of the first bottom plate member. The intermediate member has a length 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 side in the length direction of the inner bottom portion. 9. The insole according to any one of claims 1 to 8, wherein the insole is placed on the first sole plate member with a space between the . The insole according to any one of claims 1 to 9, wherein a front end portion of the intermediate member of the intermediate member is positioned near a starting point position of the beam portion of the first bottom plate member. The insole according to any one of claims 1 to 10, wherein the intermediate member has a total length of 35/100 to 45/100 of the total length of the first sole plate member. The insole according to any one of claims 1 to 11, wherein the total length of the upper plate member is shorter than the total length of the first bottom plate member. 3. The insole according to claim 2, wherein the second bottom plate member is covered with a first cloth member, and the upper plate member is covered with a second cloth member. The insole according to claim 2, wherein at least the first bottom plate member and the second bottom plate member are made of different resin materials. The insole according to any one of claims 1 to 12, wherein at least the first bottom plate member and the intermediate member are made of different resin materials.

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